JPH078048Y2 - Cleaning equipment for coating equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cleaning device for a coating device for cleaning a coating device equipped with a color changing valve mechanism and a coating gun with a cleaning fluid such as thinner. .

[Conventional technology]

Conventionally, for example, as shown in Japanese Utility Model Application Laid-Open No. 58-166851, in a coating apparatus having a color changing valve mechanism that selects and supplies a required color from a plurality of colors of coating material, after completion of coating work, To gradually clean the paint supply pipe by alternately supplying cleaning thinner and air a plurality of times in order to remove the paint remaining in the paint supply pipe connecting the color change valve mechanism and the coating gun. Was being conducted.

[Problems to be solved by the device]

In the above conventional device, the thinner is supplied from the thinner supply source through the thinner valve into the color change valve mechanism and the paint supply pipe, and the paint remaining in the paint supply pipe is extruded and washed, and then all of the thinner is supplied. However, there is a problem that a large amount of cleaning thinner is consumed in order to completely clean the paint supply pipe.

The present invention has been made in order to solve the above-mentioned problems, and it is a method for cleaning a coating apparatus capable of effectively cleaning the paint supply pipe during color change while suppressing the consumption of cleaning fluid such as thinner. The purpose is to provide a device.

[Means for Solving the Problems]

The present invention is directed to a color changing valve mechanism having a plurality of paint valves respectively communicating with a plurality of paint sources, and a coating gun for spraying the paint supplied from the color changing valve mechanism through a paint supply pipe onto an object to be coated. A cleaning device of a coating device for cleaning the inside of the paint supply pipe by alternately supplying a cleaning fluid and air to a coating device provided with, and communicating with the color change valve mechanism through a communication pipe. A cleaning fluid source, a recovery section having a recovery tube and a tank for recovering the cleaning fluid supplied from the cleaning fluid source to the paint supply tube through the communication tube and the color changing valve mechanism, and the recovery section A cleaning fluid re-supply unit having a pump and a cleaning fluid re-supply pipe for supplying the cleaning fluid collected in the tank of the cleaning fluid to the color change valve mechanism in the initial stage of the cleaning process; Gun for supplying the cleaning fluid from the A cleaning pipe is provided, and a coating position at which the paint supply pipe and the coating gun communicate with each other, a fluid recovery position at which the paint supply pipe and the recovery pipe communicate with each other, and the gun cleaning pipe. It is provided with a switching valve that switches between three positions, a gun cleaning position that communicates with the paint gun.

[Action]

According to the present invention having the above-mentioned configuration, in the initial stage of the cleaning process, the used cleaning fluid stored in the tank of the recovery unit is pumped with the switching valve provided in the coating material supply pipe set to the coating material supply position. By supplying to the color change valve mechanism by
The cleaning fluid is supplied from the color change valve mechanism to the coating gun through the paint supply pipe, and preliminary cleaning of the color change valve mechanism, the paint supply pipe, the coating gun and the like is performed.

Then, with the switching valve set to the fluid recovery position, by supplying the unused cleaning fluid from the cleaning fluid source to the color change valve mechanism through the communication pipe, The color change valve mechanism and the paint supply pipe are subjected to finish cleaning, and the cleaning fluid is recovered in the tank through the recovery pipe. When the switching valve is set to the gun cleaning position, the unused cleaning fluid is supplied from the cleaning fluid source to the gun cleaning pipe to supply the unused cleaning fluid to the coating gun. Finish cleaning of the gun will be performed.

〔Example〕

FIG. 1 shows a schematic configuration diagram of a cleaning apparatus for a coating apparatus according to an embodiment of the present invention. The coating apparatus 1 includes a color changing valve mechanism 4 including a manifold 3 provided with a plurality of paint valves 2 and a coating gun 6 communicating with the color changing valve mechanism 4 via a paint supply pipe 5. . Each of the paint valves 2 is in communication with a paint source (not shown) via a communication pipe 9 having a cock 7 and a regulator 8.

In the manifold 3 of the color changing valve mechanism 4, an air valve 11 communicating with an air source 10 and a fluid valve communicating with a cleaning fluid source 15 via a communication pipe 14 having a cock 12 and a regulator 13.
16 and are provided. A three-position switching valve 17 is provided in the paint supply pipe 5 arranged between the color switching valve mechanism 4 and the coating gun 6. The three-position switching valve 17 connects the paint supply pipe 5 with the coating gun 6 when it is set at the central coating position, and connects it to the cleaning fluid source 15 when it is set at the right gun cleaning position. The gun cleaning pipe 18 communicated with the coating gun 6 is communicated with the coating gun 6, and the paint supply pipe 5 is communicated with the recovery pipe 19 when set to the left fluid recovery position.

The recovery pipe 19 is connected to a tank 20 for recovering and containing a cleaning fluid such as thinner supplied at the final stage of the cleaning process described later, and this tank 20 includes a pump 21 and a cleaning fluid resupply pipe 22. It is connected to the communication pipe 14 through the above. The recovery pipe 19 and the tank 20 constitute a cleaning fluid recovery unit 23, and the pump 21 and the cleaning fluid re-supply pipe 22 allow the cleaning fluid in the tank 20 to flow in the initial stage of the cleaning process. A re-supply unit 24 for the cleaning fluid supplied to the fluid valve 16 is configured.

In the above-mentioned configuration, when the coating object conveyed by the conveyer or the like is sequentially color-changed and coated, each paint of the color-changing valve mechanism 4 is set with the three-position switching valve 17 set to the neutral coating position. Of the valves 2, the valve corresponding to the color to be used first is opened, and the paint of a specific color is supplied to the manifold 3 via the communication pipe 9 and the paint valve 2. The paint supplied into the manifold 3 is supplied to the coating gun 6 via the paint supply pipe 5 and the three-position switching valve 17, and is supplied from the air source 10 to the coating gun 6 via the air supply pipe 25. Is sprayed onto the object to be coated with the air.

When the previous color coating operation is completed and the process shifts to the next color coating process, first, the previous color coating valve 2 is closed, and then the fluid valve 16 is opened and the cleaning fluid resupply unit is opened. The pump 21 of 24 is operated to supply the cleaning fluid contained in the tank 20 to the communication pipe 14 via the cleaning fluid resupply pipe 22 and the check valve 26. The cleaning fluid supplied to the communication pipe 14 is supplied to the manifold 3 of the color change valve mechanism 4 via the cock 12, the regulator 13, and the fluid valve 16, and the paint supply pipe 5 and the three-position changeover valve 17 are connected. It is supplied to the coating gun 6 via the. As a result, the previous color paint remaining in the manifold 3, the paint supply pipe 5, and the coating gun 6 is extruded by the cleaning fluid, and the initial stage of the cleaning process is executed. Then, after the supply of the cleaning fluid is stopped, the air valve 11 is opened to supply the air from the air source 10 to the manifold 3 of the color change valve mechanism 4, the paint supply pipe 5, and the like. If necessary, the cleaning fluid in the tank 20 and the air from the air source 10 are alternately supplied a plurality of times to preliminarily clean the paint supply pipe 5 and the like.

When the above pre-cleaning is completed, with the three-position switching valve 17 set to the fluid recovery position on the left side, an unused cleaning fluid is checked from the cleaning fluid source 15 in place of the cleaning fluid in the tank 20. After supplying the manifold 3 and the paint supply pipe 5 to the manifold 3 and the paint supply pipe 5 through the communication pipe 27 and the like, the air is supplied from the air source 10 into the manifold 3 through the air valve 11 to clean the manifold 3 and the paint supply pipe 5. Do. Then, if necessary, the cleaning fluid and air source 10 for the cleaning fluid source 15
By alternately supplying the air of 2 times, the finish cleaning in the final stage of the cleaning process is executed. The cleaning fluid used for this finishing cleaning passes through the recovery pipe 19 and the tank 20.
It is collected and housed inside.

When the cleaning process of the fluid supply pipe 5 and the like is completed, the three-position switching valve 17 is switched to the right gun cleaning position and the fluid valve 16
In the closed state, the unused cleaning fluid is supplied from the cleaning fluid source 15 to the coating gun 6 through the gun cleaning pipe 18 and the three-position switching valve 17 to clean the coating gun 6. Then, when the cleaning of the coating gun 6 is completed, the three-position switching valve 17 is switched to the neutral position, and the valve corresponding to the next color paint of each paint valve 2 is opened to start the next color paint. To do.

As described above, the recovery unit 23 for recovering the cleaning fluid such as thinner supplied from the cleaning fluid source 15 to the manifold 3 and the paint supply pipe 5 is provided, and the used cleaning liquid recovered in the recovery unit 23 is used. Re-supply unit 24 for the cleaning fluid that supplies the fluid to the paint supply pipe 5 and the like in the initial stage of the cleaning process.
With the provision of the above, the paint supply pipe 5 can be effectively cleaned at the time of color change while suppressing the consumption of the cleaning fluid.

That is, it is not necessary to completely clean the paint supply pipe 5,
Even if a cleaning fluid mixed with the previous color paint is used, the cleaning fluid used at the previous color change is reused for preliminary cleaning at the initial stage of the cleaning process. The consumption amount of the working fluid can be reduced. Then, in the final stage of the cleaning process, an unused cleaning fluid is supplied from the cleaning fluid source 15 to perform normal cleaning, thereby performing finish cleaning for completely cleaning the interior of the paint supply pipe 5. You can

Further, in the above embodiment, since the cleaning fluid used in the final stage of the cleaning process is collected and reused, the paint supply pipe 5 can be reused during the preliminary cleaning.
There is an advantage that it is possible to prevent a plurality of paints from being mixed inside and to effectively carry out preliminary cleaning.

[Effect of device]

As described above, according to the present invention, the cleaning fluid source communicates with the color change valve mechanism via the communication pipe, and the cleaning fluid source supplies the paint supply pipe through the communication pipe and the color change valve mechanism. A recovery unit having a recovery pipe and a tank for recovering the cleaning fluid, and a pump and a re-supply pipe for supplying the cleaning fluid recovered in the tank of the recovery unit to the color change valve mechanism in the initial stage of the cleaning process. The cleaning fluid re-supplying unit and the gun cleaning pipe for supplying the cleaning fluid in the cleaning fluid source to the coating gun are provided, and the coating material supply pipe is connected to the coating gun. It is easy to install because there is a switching valve that switches between three positions: the coating position, the fluid recovery position that connects the paint supply pipe and the recovery pipe, and the gun cleaning position that connects the gun cleaning pipe and the coating gun. Inside the tank And prewashed with reuse the contained spent cleaning fluid, unused cleaning fluid contained in the cleaning fluid source can be performed and the finish washing using. Therefore, there is an advantage that the color change valve mechanism, the paint supply pipe, the coating gun, etc. can be effectively cleaned while suppressing the consumption of the cleaning fluid such as thinner.

[Brief description of drawings]

The drawings are schematic diagrams showing an embodiment of a cleaning apparatus for a coating apparatus according to the present invention. 1 ... Painting device, 2 ... Paint valve, 3 ... Color change valve mechanism, 5
…… Paint supply pipe, 7 …… Painting gun, 14 …… Communication pipe, 15…
… Fluid source for cleaning, 17 …… Switching valve, 18… Gun cleaning pipe, 21
...... Pump, 22 ...... Re-supply pipe, 23 ...... Recovery section, 24 ...... Cleaning fluid re-supply section

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A color change valve mechanism comprising a plurality of paint valves communicating with a plurality of paint sources, and a coating for spraying the paint supplied from the color change valve mechanism through a paint supply pipe onto an object to be coated. A cleaning device of a coating device for supplying a cleaning fluid and air to a coating device equipped with a gun alternately a plurality of times to clean the interior of the paint supply pipe, wherein the color change valve mechanism is connected to the color change valve mechanism via a communication pipe. A cleaning fluid source communicating with the recovery fluid, a recovery section having a recovery tube and a tank for recovering the cleaning fluid supplied from the cleaning fluid source to the paint supply tube through the communication tube and the color changing valve mechanism, and the recovery section. And a cleaning fluid resupply unit having a pump and a cleaning fluid resupply pipe for supplying the cleaning fluid recovered in the tank of the cleaning unit to the color change valve mechanism in the initial stage of the cleaning process, and the cleaning fluid. The gas that supplies the cleaning fluid in the source to the painting gun. A cleaning pipe is provided, a coating position where the paint supply pipe and the coating gun communicate with the paint supply pipe, a fluid recovery position where the paint supply pipe communicates with the recovery pipe, and the gun cleaning pipe. A coating device cleaning device, which is provided with a switching valve for switching between three positions, a gun cleaning position in which a paint gun and a coating gun communicate with each other.