JP2009006266A - Water-based paint atomization coating system - Google Patents

Abstract

To provide an aqueous paint atomization coating system capable of reliably preventing the fixation of an aqueous paint in a paint path.
A rotary atomizing head 13 of a coating machine 2 atomizes water-based paint sent from a cartridge 15 via a paint path 17 and sprays it on an automobile body. The mist air nozzle 43 generates mist air A1 containing water that has been atomized into small droplets. The mist air supply valve 40 supplies mist air A1 injected from the mist air nozzle 43 to the manifold 37, and further supplies the mist air A1 to the cleaning liquid supply path 18 in the coating machine 2 via the cleaning liquid supply pipe 35, the connector 31 and the connection port 26. , And merge at a position upstream of the painting path 17. The cleaning process of the coating path 17 is terminated with the ventilation of the mist air A1.
[Selection] Figure 2

Description

  The present invention relates to an aqueous paint atomizing coating system for cleaning a paint residue in a paint path with a fluid.

  2. Description of the Related Art Conventionally, in an automobile body painting line, automobile bodies with different paint colors are mixed and conveyed, so that a painting system is configured so that color-changing painting can be performed according to the automobile body. In the paint system, when changing the color from the previous color paint to the next color paint, color mixing is prevented by washing the paint remaining in the paint machine and in the paint path to the paint machine. Yes. In this cleaning, a method for efficiently cleaning the paint path by alternately supplying cleaning liquid and cleaning air is employed. For example, Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique for improving cleaning efficiency by alternately flowing a pressurized gas and a pressurized solvent into a paint path.

  In recent years, from the viewpoint of environmental protection, regulations on discharged organic solvents and VOC regulations for paints in the painting process have increased. In order to meet these regulations, water-based paints that do not use organic solvents have been developed and used for painting automobile bodies.

  If the cleaning liquid (for example, thinner) remains in the paint path during the color change cleaning, the quality of the coating is deteriorated by mixing the cleaning liquid with the paint. For this reason, in conventional coating systems using solvent-based paints, dry air is generally used as cleaning air in order to reliably remove the cleaning liquid (see, for example, Patent Document 2). The inside of the paint path is dried by the ventilation of the dry air, and the deterioration of the coating quality due to the moisture mixed in the solvent-based paint is prevented. Also, in the coating system using the water-based paint, since the system is constructed using the existing equipment, dry air is used at the time of color change cleaning as in the case of the solvent-based paint.

Incidentally, in a conventional coating system using a water-based paint, a technique for removing a dry water-based paint by supplying a water-based paint for washing and washing water into the paint path is disclosed (for example, Patent Document 3). reference).
JP 2002-1173 A JP-A-4-363171 JP 2005-205348 A

  By the way, in the car body painting line, the car body is sequentially conveyed in a relatively short time, so that a sufficient washing time for color change cannot be ensured, which may result in insufficient washing. In this case, only a small amount of paint remains in the paint path, and the problem of color mixing is relatively unlikely. Further, when the next color paint is supplied immediately after the color change cleaning, the water-based paint is unlikely to be dried and fixed in the paint path. However, when the painting line is stopped for a certain period of time during a lunch break or the like, there is a high possibility that the paint residue in the paint path is dried and fixed by dry air supplied at the time of color change cleaning. After that, when the painting line is operated and the color change coating is resumed, the paint residue fixed in the paint path is mixed in the next color paint as a lump, resulting in a problem that the paint quality is deteriorated.

  In addition, when washing water is used at the time of color change washing as in Patent Document 2, adhesion of paint residue can be prevented. However, if washing water remains in the paint path, the washing water is mixed into the paint and is sufficient. The problem that it becomes impossible to ensure proper coating quality arises.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an aqueous paint atomization coating system that can reliably prevent the aqueous paint from being fixed in the paint path and improve the coating quality. There is.

  In order to solve the above problems, an invention according to claim 1 is an aqueous paint atomizing coating system for cleaning a paint residue in a paint path with a fluid, from the paint color changing device or the detachable paint cartridge. Water-based paint atomizing means for atomizing the water-based paint sent via the water and spraying it on the object to be coated, water-drop-containing air generating means for generating air containing water that has been atomized into small droplets, and the water droplets Water supply means for supplying water to the contained air generating means, air supply means for supplying pressurized air to the water-containing air generating means, and for cleaning paint residues in the paint path, Water droplet-containing air merging means for merging the water droplet-containing air at a position upstream of the water-based paint atomizing means, and a vent for controlling the water droplet-containing air merging means so as to terminate the cleaning process by venting the water droplet-containing air. The aqueous paint atomizing coating system characterized in that a control unit as its gist.

  According to the first aspect of the present invention, the water-based paint sent from the paint color changing device or the detachable paint cartridge through the paint path is atomized by the water-based paint atomizing means and sprayed on the object to be coated. Then, the object is painted. Further, in the water droplet-containing air generating means, air containing water that has been atomized into small droplets using water supplied from the water supply means and pressurized air supplied from the air supply means (water droplet-containing air) Is generated. Then, in order to clean the paint residue in the paint path, the water drop-containing air merging means is controlled by the air flow control means, so that the water droplet-containing air joins the upstream position of the water-based paint atomizing means in the coating path. Then, the cleaning process is completed with the ventilation of the water droplet-containing air. In this way, the interior of the coating path is not dried as in the prior art using dry air, but is maintained in an appropriate moisturizing state. Can do. In addition, the cleaning efficiency can be increased by allowing water droplet-containing air to pass through the paint path.

  According to a second aspect of the present invention, in the first aspect, in order to clean the paint residue in the paint path, pressurized water or a pressurized aqueous cleaning agent is added at a position upstream of the aqueous paint atomizing means in the paint path. A liquid merging means for merging, and the aeration and flow control means is configured to selectively flow the pressurized water or the pressurized aqueous cleaning agent and the aeration of the water containing the water droplets. The gist is to control the means.

  According to the second aspect of the present invention, the water drop-containing air merging means and the liquid merging means are controlled by the aeration liquid passing control means, so that the passage of the pressurized water or the pressurized aqueous cleaning agent and the ventilation of the water drop-containing air is selected. Done. In this way, it is possible to alternately perform the flow of pressurized water or pressurized aqueous cleaning agent and the ventilation of water containing water droplets, and pressurize water or pressurized water in the wall surface portion of the paint path as compared with the case of performing only the flow of liquid. The flow rate of the detergent can be increased. As a result, the paint residue in the paint path can be efficiently cleaned and removed.

  The invention described in claim 3 is that in claim 2, the vent flow control means performs the flow of pressurized water or pressurized aqueous cleaning agent before venting the water containing water droplets at the start of the cleaning step. The gist is to control the water droplet-containing air confluence means and the liquid confluence means.

  According to the third aspect of the present invention, the water droplet-containing air merging means and the liquid merging means are controlled by the vent flow control means, so that the pressurized water or the pressurized water is supplied before the water droplet-containing air is vented at the start of the cleaning process. The cleaning detergent is passed through. If it does in this way, drying in a paint course can be prevented and adhesion of paint residue can be prevented more certainly.

  According to a fourth aspect of the present invention, in the third aspect, the vent flow control means alternately performs the flow of the pressurized aqueous cleaning agent and the vent of the water droplet-containing air, and then passes the pressurized water and the water droplet-containing air. The gist of the present invention is to control the water droplet-containing air merging means and the liquid merging means so as to alternately perform ventilation.

  According to the fourth aspect of the present invention, the paint residue in the paint path can be reliably removed by alternately passing the pressurized aqueous detergent and venting the water containing water droplets. Thereafter, the cleaning agent remaining in the paint path can be reliably washed away by alternately passing the pressurized water and the water containing water droplets. In this case, it is possible to avoid the problem that the coating quality deteriorates due to a change in the coating component due to the cleaning agent remaining in the coating path.

  According to a fifth aspect of the present invention, in any one of the second to fourth aspects, the passage of the pressurized water or the pressurized aqueous cleaning agent is performed on the cleaning fluid recovery means provided at a position separated from the object to be coated. The gist is to alternately perform the aeration of liquid and water droplet-containing air.

  According to the fifth aspect of the present invention, the inside of the paint path is cleaned by the passage of pressurized water or pressurized aqueous cleaning agent and the passage of water containing water droplets, and the drainage or exhaust discharged at that time is the fluid recovery means for cleaning. It is reliably collected at. Therefore, droplets such as water-containing air are not sprayed on the object to be coated, and the coating quality can be maintained well.

  As described in detail above, according to the first to fifth aspects of the present invention, it is possible to reliably prevent the aqueous paint from being fixed in the paint path and to improve the coating quality.

[First Embodiment]

  DESCRIPTION OF EMBODIMENTS A first embodiment embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an aqueous paint atomization coating system in the present embodiment.

  As shown in FIG. 1, an aqueous paint atomization coating system 1 includes an electrostatic coating machine 2, a painting robot 3, a cartridge exchange device 4, a cleaning unit 5, and a control device 6 (ventilation flow control means). For example, it is incorporated into a painting line for painting an automobile body (object to be coated).

  The control device 6 is constituted by a known computer including a CPU, a ROM, a RAM, an input / output port, and the like. The control device 6 is electrically connected to the painting robot 3, the cartridge exchange device 4, the cleaning unit 5, and the like, and controls them by various control signals.

  The coating machine 2 is attached to the tip of the arm 11 of the painting robot 3, and a rotary atomizing head 13 (water-based paint atomizing means) is rotatably provided in front of the machine body 12. A detachable paint cartridge 15 is mounted on the mounting portion 14 provided on the back surface of the machine body 12. The water-based paint in the cartridge 15 is supplied to the rotary atomizing head 13 through a paint path 17 provided inside the machine body 12. Then, when the rotary atomizing head 13 rotates, the water-based paint is atomized and sprayed on the automobile body. Further, a cleaning liquid supply path 18 that supplies cleaning liquid and cleaning air for cleaning the paint path 17 in communication with the upstream end of the paint path 17 is provided inside the machine body 12.

  The painting robot 3 drives the arm 11 in response to a control signal from the control device 6 to change the position and painting direction of the painting machine 2. As a result, the automobile body conveyed on the painting line can be painted.

  The cartridge exchange device 4 is a device for exchanging cartridges with respect to the coating machine 2, and a stocker 21 for accommodating a plurality of cartridges 15 corresponding to the paint color, and taking out and storing the cartridges 15 from the stocker 21. A handling unit 22 is provided inside the frame 23. The stocker 21 and the handling unit 22 of the cartridge exchange device 4 are driven and controlled by the control device 6.

  The stocker 21 is provided with a rotating device 25. When the specified cartridge 15 is taken out, the stocker 21 is rotated by the rotating device 25 by an angle corresponding to the storage position of the cartridge 15. Thereafter, the predetermined cartridge 15 is taken out by the handling unit 22 and mounted on the mounting portion 14 of the coating machine 2.

  Further, the cartridge exchange device 4 is provided with a cleaning unit 5 that is connected to a connection port 26 of the cleaning liquid supply path 18 in the coating machine 2 and supplies cleaning liquid and cleaning air. Further, a recovery hopper 27 (cleaning fluid recovery means) for recovering cleaning waste liquid such as excess paint and cleaning liquid generated when the cartridge 15 is replaced is provided below the cartridge replacement device 4.

  As shown in FIG. 2, the cleaning unit 5 includes a connector 31 for connecting the coating machine, an actuator 32 for connecting the connector 31 to the coating machine 2, and a pressurized aqueous cleaning agent C <b> 1 as a cleaning fluid, A valve device 34 for selectively supplying pressurized water W1 and mist air A1 (water droplet-containing air), and a cleaning liquid supply pipe 35 for connecting the valve device 34 and the connector 31 are provided.

  The actuator 32 is composed of, for example, an air cylinder, and the connector 31 is attached to or detached from the connection port 26 of the coating machine 2 by driving the cylinder rod 36 and moving the connector 31.

  The valve device 34 includes a manifold 37 and a plurality of cleaning valves (specifically, a pressurized water supply valve 38, a cleaning agent supply valve 39, and a mist air supply valve 40) assembled to the manifold 37. In the valve device 34, a supply source 41 (for example, a pressurization pump) that supplies the pressurization water W1 increased to a predetermined water pressure is connected to the pressurization water supply valve 38 (liquid merging means). Further, a supply source 42 (for example, a pressure pump) that supplies the pressurized aqueous cleaning agent C1 that has been increased to a predetermined hydraulic pressure is connected to the cleaning agent supply valve 39 (liquid merging means). Further, a mist air nozzle 43 (water droplet-containing air generating means) that generates mist air A1 (water droplet-containing air) containing water atomized into small droplets is connected to the mist air supply valve 40 (water droplet-containing air confluence means). Has been.

  Each of the cleaning valves 38 to 40 is an air operated type valve that is opened and closed by air pressure. A connection port (not shown) is formed on the side surface of each valve 38 to 40 to supply the operating air from the air supply source. It has come to be. In the present embodiment, the supply / interruption of the operating air is controlled by driving a solenoid valve (not shown) by the control device 6.

  At the time of cleaning the paint path 17, operating air is supplied to any one of the cleaning valves of the valve device 34, thereby opening the valve. As a result, any one of the pressurized aqueous cleaning agent C1, the pressurized water W1, and the mist air A1 passes through the manifold 37, and further passes through the cleaning liquid supply pipe 35, the connector 31, and the connection port 26, and the cleaning liquid supply path 18 in the coating machine 2. And finally joins the paint path 17.

  FIG. 3 shows a specific example of the mist air nozzle 43.

  The mist air nozzle 43 is an atomization device for generating mist air A1 and is fixed to the housing 45 of the valve device 34. The mist air nozzle 43 has a double structure in which a water supply cylinder 48 is accommodated in a cylindrical case 47, and a water supply path 49 is formed inside the water supply cylinder 48. The water supply path 49 is formed so that the flow path area becomes smaller toward the tip end side of the water supply cylinder 48, and the tip end portion communicates with the mist air supply path 50 on the mist air supply valve 40 side. The water supply path 49 is connected to a supply source 52 (water supply means) of water W2 through a water supply pipe 51 connected to the side surface of the case. Further, a valve body 53 for adjusting the amount of water supply is provided in the water supply cylinder 48 on the upstream side of the water supply path 49. This valve body 53 also functions as a paint backflow prevention means for preventing backflow of paint leaking from the coating machine 2 side.

  An air supply path 55 is formed outside the water supply cylinder 48. The air supply path 55 is also formed so that the flow channel area becomes smaller toward the distal end side of the water supply cylinder 48, and the distal end portion communicates with the mist air supply path 50. Further, the air supply path 55 is connected to a supply source 57 (air supply means) of cleaning air A2 (pressurized air) via an air supply pipe 56 connected to the side surface of the case.

  By forming the water supply path 49 and the air supply path 55 in this way, the water W2 and the cleaning air A2 are ejected vigorously toward the mist air supply path 50, and the water W2 is atomized in the flow of the cleaning air A2. The generated mist air A1 is continuously generated.

  Further, an air chamber 59 to which the working air A3 is supplied from the supply source 58 is provided at the rear part in the case 47. By the air pressure acting on the air chamber 59, the proximal end side of the water supply cylinder 48 is pushed against the urging force of the spring 60, and the position of the water supply cylinder 48 in the case 47 is changed. Thereby, the injection quantity of mist air A1 injected from the mist air nozzle 43 is adjusted.

  In the present embodiment, the mist air A1 ejected from the mist air nozzle 43 preferably has a central value of the water droplet diameter in the range of 10 μm to 100 μm. The flow rate of the mist air A1 ejected from the mist air nozzle 43 is preferably in the range of 10 L / min to 2000 L / min. If this mist air A1 is ventilated to the paint path 17 of the coating machine 2, the paint residue in the paint path 17 is efficiently removed by the contained water droplets.

  Next, an operation example of the water-based paint atomization coating system 1 of the present embodiment will be described.

  First, the control device 6 drives the arm 11 by controlling the painting robot 3 to change the position of the painting machine 2 and the painting direction, and paints the automobile body conveyed on the painting line.

  After the painting is completed, the control device 6 drives the arm 11 by controlling the painting robot 3 so that the rotary atomizing head 13 of the painting machine 2 is accommodated in the collection hopper 27. Move. At this time, the control device 6 drives and controls the stocker 21 and the handling unit 22 of the cartridge exchange device 4 to remove the used cartridge 15 from the mounting portion 14 of the coating machine 2 and to coat the unused cartridge 15. Attach to the mounting part 14 of the machine 2. Further, the control device 6 controls the actuator 32 of the cleaning unit 5 to attach the connector 31 to the connection port 26 of the coating machine 2.

  Then, the control device 6 controls the valve device 34 to supply the cleaning agent C 1, the pressurized water W 1 and the mist air A 1 from the cleaning unit 5 to the cleaning liquid supply path 18 in the coating machine 2, and remains in the paint path 17. Clean and remove paint.

  Specifically, as shown in FIG. 4, the cleaning agent supply valve 39 and the mist air supply valve 40 in the valve device 34 are alternately opened, and the passage of the pressurized aqueous cleaning agent C1 and the ventilation of the mist air A1 are performed for a predetermined time. It is performed alternately at intervals of T1 (for example, 0.7 seconds). Thereafter, the pressurized water supply valve 38 and the mist air supply valve 40 in the valve device 34 are alternately opened, and the passage of the pressurized water W1 and the ventilation of the mist air A1 are alternately performed at intervals of a predetermined time T1 (for example, 0.7 seconds). Finally, the mist air A1 is vented for a predetermined time T2 (for example, 1.5 seconds), and the cleaning process is completed.

  After cleaning the paint path 17, the control device 6 drives the arm 11 by controlling the painting robot 3, and after moving the painting machine 2 to a position corresponding to the automobile body conveyed on the painting line, The car body is painted by the painting machine 2.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) In the water-based paint atomization coating system 1 of the present embodiment, the mist air A1 is generated by the mist air nozzle 43, and the cleaning process of the paint path 17 is completed with the ventilation of the mist air A1. If it does in this way, the inside of the painting path | route 17 will not be in the dry state like the prior art using dry air, but it will be maintained in a moderate moisture retention state. Therefore, even when the coating line is stopped for a certain period of time, such as during a lunch break, it is possible to reliably prevent the water-based paint from adhering in the paint path 17. Furthermore, water that affects the coating quality of the water-based paint does not remain in the coating path 17. In addition, by allowing the mist air A1 to pass through the paint path 17, small water droplets are uniformly dispersed throughout the paint path 17, and the cleaning efficiency can be improved.

  (2) In the water-based paint atomization coating system 1 of the present embodiment, the pressurized water W1 or the pressurized aqueous cleaning agent C1 and the mist air A1 are alternately passed through, so that the pressurized water W1 or the pressurized aqueous cleaning agent C1 Compared with the case where only the liquid flow is performed, the flow rate of the pressurized water W1 or the pressurized aqueous cleaning agent C1 in the wall surface portion of the paint path 17 can be increased. As a result, the paint residue in the paint path 17 can be efficiently washed and removed.

  (3) In the aqueous paint atomization coating system 1 of the present embodiment, the pressurized aqueous cleaning agent C1 is passed prior to the ventilation of the mist air A1 at the start of the cleaning process. If it does in this way, drying in paint course 17 can be prevented and adhesion of paint residue can be prevented more certainly.

  (4) In the aqueous paint atomization coating system 1 of the present embodiment, the pressurized aqueous cleaning agent C1 and the mist air A1 are alternately passed, and then the pressurized water W1 and the mist air A1 are alternately passed. By doing so, the cleaning agent C1 remaining in the paint path 17 can be reliably washed away. In this case, it is possible to avoid the problem that the coating component deteriorates due to the cleaning agent C1 and the coating quality deteriorates.

(5) In the water-based paint atomization coating system 1 of the present embodiment, after the painting on the automobile body is finished, the painting robot 3 is driven to paint on the recovery hopper 27 located away from the automobile body. The machine 2 is moved, and the inside of the paint path 17 of the coater 2 is cleaned at that position. In this case, the drainage or exhaust discharged during the cleaning is reliably recovered by the recovery hopper 27. Accordingly, the spray quality such as mist air A1 is not sprayed on the automobile body, and the coating quality can be maintained well.
[Second Embodiment]

  Next, a second embodiment embodying the present invention will be described.

  As shown in FIG. 5, the water-based paint atomization coating system 61 according to the present embodiment is a color change valve device 62 (paint color change) for selectively selecting each color paint and feeding it to the coating machine 2. Device). The color change valve device 62 is provided with a manifold 64 that forms a part of the paint path 63 to the coating machine 2, and a plurality of color change valves 65 on the left and right sides along the longitudinal direction of the manifold 64, and A plurality of cleaning valves (specifically, a pressurized water supply valve 38, a cleaning agent supply valve 39, and a mist air supply valve 40) are mounted.

  Each color changing valve 65 is connected to a paint supply source (paint tank) 66 for supplying paint of each color. Similarly to the first embodiment, the pressurized water supply valve 38 is connected to the pressurized water W1 supply source 41, and the cleaning agent supply valve 39 is connected to the pressurized aqueous cleaning agent C1 supply source 42 to supply the mist air. A mist air nozzle 43 that generates mist air A1 is connected to the valve 40.

  The valves 38 to 40 and 65 of the color change valve device 62 are air operated valves that are opened and closed by air pressure. On the side surfaces of the valves 38 to 40 and 65, connection ports (not shown) are formed. The operating air from the supply source is supplied.

  In the color change valve device 62, supplying the operating air to any one of the color change valves 65 opens the valve 65, and supplies the paint to the coating machine 2 through the manifold 64 and the paint path 63. The car body is painted in

  After the coating is completed, as in the first embodiment, the cleaning valves 38 to 40 are selectively opened (see FIG. 4), and the flow of the pressurized aqueous cleaning agent C1 and the ventilation of the mist air A1 are alternately performed. Then, the pressurized water W1 and the mist air A1 are alternately passed. As a result, the paint remaining in the paint path 63 is washed and removed.

  Even when the water-based paint atomization coating system 61 is configured as described above, the same operational effects as those of the first embodiment can be obtained.

  In addition, you may change each embodiment of this invention as follows.

  In each of the above embodiments, the mist air nozzle 43 mixes the cleaning air A2 and the water W2 to generate the mist air A1, but generates mist air containing the cleaning agent C1 in addition to the water W2. It may be configured.

  In each of the above-described embodiments, the coating machine 2 having the rotary atomizing head 13 (rotary atomizing head type coating means) is used as the water-based paint atomizing means. You may use the coating machine which has.

  In each of the above embodiments, the water-based paint atomization coating system 1 and 61 for painting the automobile body is embodied, but the painting system for painting automobile parts such as bumpers and other parts is applied. It may be embodied.

  Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the embodiments described above are listed below.

  (1) The aqueous paint atomizing coating system according to any one of claims 1 to 5, wherein the aqueous paint atomizing means is a rotary atomizing head type painting means or an air jet type painting means.

  (2) The water-based paint mist according to any one of claims 1 to 5, wherein the water droplet-containing air generating means is provided with a backflow preventing means on the upstream side of the water supply path. Paint system.

  (3) In Claim 5, the water-based paint atomizing means includes means for moving the water-based paint atomizing means onto the cleaning fluid recovery means in a state where spraying of the water-based paint is stopped. A characteristic water-based paint atomization coating system.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows the water-based paint atomization coating system of 1st Embodiment which actualized this invention. The schematic block diagram which shows a washing | cleaning unit. Sectional drawing which shows a mist air nozzle. The time chart for demonstrating operation | movement of a water-based paint atomization coating system. The schematic block diagram which shows the water-based paint atomization coating system of 2nd Embodiment which actualized this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,61 ... Water-based paint atomization coating system 6 ... Control apparatus as ventilation | gas_flowing liquid control means 13 ... Rotary atomization head as water-based paint atomization means 15 ... Detachable paint cartridge 17 ... Paint path | route 27 ... Fluid recovery for washing | cleaning Recovery hopper as means 38 ... Pressurized water supply valve as liquid merging means 39 ... Cleaner supply valve as liquid merging means 40 ... Mist air supply valve as water drop containing air merging means 43 ... Mist air nozzle 52 as water drop containing air generating means 52 ... Supply source as water supply means 57 ... Supply source as air supply means 62 ... Color change valve device as paint color changing device A1 ... Mist air as water droplet-containing air A2 ... Cleaning air as pressurized air C1 ... Pressurized water Cleaning agent W1 ... Pressurized water W2 ... Water

Claims (5)

An aqueous paint atomizing coating system for cleaning paint residue in a paint path with a fluid,
An aqueous paint atomizing means for atomizing the aqueous paint sent from the paint color changing device or the detachable paint cartridge via the paint path and spraying it on the object;
Water droplet-containing air generating means for generating air containing water atomized into small droplets;
Water supply means for supplying water to the water droplet-containing air generating means;
Air supply means for supplying pressurized air to the water droplet-containing air generating means;
Water droplet-containing air merging means for merging water droplet-containing air at an upstream position of the water-based paint atomizing means in the coating path in order to wash the paint residue in the paint path;
An aqueous paint atomizing coating system, comprising: a vent flow control means for controlling the water drop-containing air merging means so as to terminate the cleaning step by venting the water-drop containing air. In order to clean the paint residue in the paint path, the apparatus includes liquid merging means for merging pressurized water or a pressurized aqueous cleaning agent at a position upstream of the water-based paint atomizing means in the coating path.
The vent flow control means controls the water drop-containing air merge means and the liquid merge means so as to selectively perform the flow of pressurized water or pressurized aqueous cleaning agent and the ventilation of water droplet-containing air. The water-based paint atomization coating system according to claim 1.   The aeration liquid passing control means controls the water drop containing air merging means and the liquid merging means so that pressurized water or a pressurized aqueous cleaning agent is allowed to flow before the water droplet containing air is vented at the start of the cleaning process. The water-based paint atomization coating system according to claim 2.   The aeration and flow control means performs the flow of the pressurized aqueous cleaning agent and the aeration of the water containing the water droplets alternately, and then performs the flow of the pressurized water and the aeration of the water containing the water droplets alternately. The water-based paint atomizing coating system according to claim 3, wherein the means and the liquid merging means are controlled.   5. The flow of pressurized water or a pressurized aqueous cleaning agent and the aeration of water containing water droplets are alternately performed on a cleaning fluid recovery means provided at a position separated from the object to be coated. The water-based paint atomization coating system according to any one of the above.

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