JPH10151385A - Paint supply method and coating equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A variety of paints can be fed to a painting gun by a single paint pump, which can reduce equipment costs and can be mounted on a painting robot, and switch painting colors. In this case, a paint feeding method and a coating device capable of reducing waste of the paint and the cleaning liquid are provided. SOLUTION: A paint selected by a first color change valve mechanism 3 connected to paint supply devices S1 to S6 is supplied to a second color change valve mechanism 4 by one paint pump 7, and a second color change valve mechanism 4 is provided. The paint provided for each color in the coating gun 5 via the paint outflow valves 4a to 4f provided for each color in the color change valve mechanism 4 and the paint discharge pipes 9a to 9f respectively connected to the paint outflow valves 4a to 4f. Discharge is performed from the nozzles 6a to 6f.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating technique applied to a coating line in, for example, a manufacturing process of an automobile, and more particularly, to a method of performing coating with different coating colors while switching paints by the same coating apparatus. And a coating apparatus.

[0002]

2. Description of the Related Art In a painting line of a vehicle, the color of the vehicle body is adjusted according to the specification of the vehicle body that is carried into the line.
For example, the color of the paint is automatically switched using a painting apparatus having a structure as shown in FIG.

That is, a coating apparatus 100 shown in the figure has paint valves 101a to 101f connected to paint supply apparatuses S1 to S6 for supplying paint of each color (in the figure, six kinds of A to F), respectively. A paint gun 102 having a color change valve mechanism 101, a paint nozzle 103, and a paint supply pipe 105 connecting the color change valve mechanism 101 and the paint nozzle 103 of the paint gun 102 via a paint pump 104. With
By operating the paint pump 104 and opening any of the paint valves 101a to 101f in accordance with the vehicle color specification, any of the paints A to F is supplied to the paint gun 102 through the paint supply pipe 105. Paint nozzle 103
From the tip of the coating gun 102
06 is rotated at a high speed so that the atomized paint is sprayed on the vehicle body to be coated.

However, the coating apparatus 100 having such a structure is used.
Since the structure before the color change valve mechanism 101 is relatively simple, the paint supply pipe 105 and the paint pump 104 can be easily mounted on a reciprocator or a painting robot. Since each color is common, there is a drawback in that, when the coating color is switched, it takes time to discharge and clean the paint remaining in the portion, and the paint is wasteful and the amount of the cleaning liquid used increases.

Therefore, as shown in FIG. 3, by dividing the paint pump and the paint supply pipe into paint colors A to F, a multi-type coating apparatus 110 which does not need to discharge and wash the paint in the relevant portion. Has been proposed.

That is, the coating apparatus 110 shown in the figure has independent paint nozzles 111a to 111a for each paint color A to F.
11f having a bell type multi-coating gun 111, each of the paint nozzles 111a to 111f and paint supply devices S1 to S
6 through the paint pumps 112a to 112f and the trigger valves 113a to 113f.
14a to 114f, and paint pumps 112a to 112f according to the vehicle color specification.
For example, by operating the paint pump 112a and opening the trigger valve 113a, the paint of color A is discharged from the paint nozzle 111a of the paint gun 111 through the paint supply pipe 114a. By rotating the, the paint is atomized and sprayed on the vehicle body.

[0007] Such a multi-coating apparatus is disclosed, for example, in JP-A-6-134354.

[0008]

However, in the above-described coating apparatus 110, the paint pump 112 uses the paint color A.
To F, that is, a number corresponding to the type of paint is required, which increases the equipment cost, requires a large installation space, and makes it difficult to mount on a painting robot or reciprocator. There is a problem,
Elimination of such problems has been a problem in the conventional multi-type coating apparatus.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional multi-coating apparatus, and can supply many kinds of paints to a coating gun by one paint pump, thereby reducing the cost. It is an object of the present invention to provide a paint supply method and a paint apparatus that can reduce the amount of paint and can be mounted on a painting robot or a reciprocator, and can reduce waste of paint and cleaning liquid when switching paint colors.

[0010]

According to a first aspect of the present invention, there is provided a paint supply method comprising a plurality of paint inlet valves connected to paint supply devices for supplying paints of respective colors. Paint of each color selectively supplied through a valve mechanism is supplied to a second color change valve mechanism by a common paint pump, and a paint outflow valve provided for each color in the second color change valve mechanism; Through a plurality of paint discharge pipes respectively connected to the paint outflow valve, it is characterized in that the paint gun is configured to discharge from a paint nozzle provided for each color, such a paint supply method configuration. This is a means for solving the above-mentioned conventional problem.

According to a second aspect of the present invention, there is provided a coating apparatus comprising: a first color change valve mechanism having a plurality of paint inflow valves respectively connected to a paint supply apparatus for supplying paints of respective colors; A second color change valve mechanism provided with the same number of paint outflow valves as the paint inflow valve provided in the change valve mechanism, and a paint supply for connecting the first and second color change valve mechanisms via a paint pump. The present invention is configured to include a plurality of paint discharge pipes that are respectively connected to a pipe and a paint outflow valve provided in a second color change valve mechanism, and connect a paint nozzle provided for each color to a paint gun. According to a third aspect of the present invention, there is provided a coating apparatus for discharging a paint remaining in a paint supply pipe and a paint pump. Configuration and a lube the second color change valve mechanism, according to claim 4 as well embodiment
In the coating apparatus according to the present invention, the first color change valve mechanism is provided with a cleaning liquid inflow valve connected to a cleaning liquid supply apparatus for supplying a cleaning liquid for the coating. It is characterized in that it is a means for solving the problem.

Further, as another embodiment of the coating apparatus according to the present invention, in the coating apparatus according to the fifth aspect, the first color change valve mechanism has a cleaning liquid inflow connected to a cleaning liquid supply apparatus for supplying a cleaning liquid for paint. A valve, a second color change valve mechanism includes a cleaning liquid outflow valve, and the coating gun further includes a cleaning nozzle.
The cleaning nozzle of the coating gun and the cleaning liquid outflow valve of the second color change valve mechanism are connected via a cleaning liquid supply pipe. Means to solve the above problems.

[0013]

According to the first aspect of the present invention, in the method for feeding paint according to the first aspect, the paint of each color selected by the first color change valve mechanism connected to the paint supply device is supplied to the second paint by a common paint pump. The paint is supplied to the change valve mechanism, and from the paint outflow valve provided for each color to the second color change valve mechanism, the paint is supplied to the paint gun through the paint discharge pipes respectively connected to the paint outflow valve. Since the discharge is performed from the provided paint nozzle, the paint supply pipe connecting the first and second color change valve mechanisms and the paint pump provided in the middle of the paint supply pipe are common. However, on the downstream side from the second color change valve mechanism, it is supplied to the coating gun through a dedicated route for each color. Therefore, when the paint color is switched, it is only necessary to discharge the paint remaining in the paint supply pipe and the paint pump between the first and second color change valve mechanisms, and it is possible to reduce waste of paint and cleaning liquid. 1. Each paint can be fed by a single paint pump, which not only reduces equipment costs, but also eliminates the need for a large installation space, making it easy to install on painting robots and reciprocators. The effect is extremely excellent.

According to a second aspect of the present invention, there is provided a coating apparatus having the above structure, that is, the first and second color change valve mechanisms, and the space between the first and second color change valve mechanisms via a paint pump. Since it is provided with a plurality of paint supply pipes to be connected, and a plurality of paint discharge pipes which respectively connect between paint outlet valves of the second color change valve mechanism and paint nozzles provided for each color in the coating gun. The present invention has a configuration suitable for implementing the paint supply method according to the present invention, eliminates waste of paint and cleaning liquid, reduces equipment costs, and enables installation on a painting robot or the like. An extremely excellent effect that it can be obtained.

In the coating apparatus according to the third aspect of the present invention, since the second color change valve mechanism is provided with a dump valve, the first and second color change valve mechanisms are switched when the coating color is switched. The paint remaining in the paint supply pipe and the paint pump connecting between the color change valve mechanisms can be easily discharged. In the coating apparatus according to the fourth embodiment, the first color change valve is further provided. The mechanism is provided with a cleaning liquid inflow valve connected to the cleaning liquid supply device, so that when the paint color is switched, the inside of the paint supply pipe and the paint pump connecting between the first and second color change valve mechanisms can be easily made. Can be washed.

Further, as another embodiment of the coating apparatus according to the present invention, in the coating apparatus according to claim 5, the first color change valve mechanism includes a cleaning liquid inflow valve.
The second color change valve mechanism has a cleaning liquid outflow valve, and the coating gun has a cleaning nozzle. The cleaning nozzle and the cleaning liquid outflow valve of the second color change valve mechanism are connected by a cleaning liquid supply pipe. Therefore, in addition to the paint supply pipe and the paint pump connecting the first and second color change valve mechanisms, the color change valve mechanism and the coating gun can be easily cleaned, and further, if necessary. A very excellent effect is provided that the inside of each paint discharge pipe connecting between each paint outflow valve of the second color change valve mechanism and each paint nozzle of the painting gun can also be cleaned.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings.

FIG. 1 is a schematic view showing the structure of a coating apparatus according to an embodiment of the present invention.
In this embodiment, six paint inlet valves 3a to 3f connected to pipes 2a to 2f respectively to paint supply devices S1 to S6 for supplying paints of six colors A to F are provided. A first color change valve mechanism 3 provided with six paint outflow valves 4a to 4
f and the dump valve 4 g are connected to the six paint outflow valves 4.
a to 4f, a second color change valve mechanism 4 provided on the downstream side, and six paint nozzles 6a corresponding to paint colors.
6f, the first and second color change valve mechanisms 3 and 4 are connected by a paint supply pipe 8 having a gear pump 7 as a paint pump. The paint outlet valves 4a to 4f of the second color change valve mechanism 4 and the paint nozzles 6a to 6f of the coating gun 5 are connected by six paint discharge pipes 9a to 9f, respectively. The second color change valve mechanism 4
Is connected to a waste tank via a waste pipe (not shown).

Using the coating apparatus 1 having the above structure, for example,
When applying the A color coating, only the paint inflow valve 3a of the first color change valve mechanism 3 is opened, and the gear pump 7 is operated, and only the paint outflow valve 4a of the second color change valve mechanism 4 is operated. By opening the valve, the A-color paint from the paint supply device S1 is supplied to the paint nozzle 6a of the coating gun 5 through the paint discharge pipe 9a, and the A-color paint discharged from the paint nozzle 6a is supplied to the paint gun. Atomization is performed by high-speed rotation of the bell 10 provided at the tip of the nozzle 5 and sprayed on the workpiece.

When the painting of the color A is completed and, for example, the painting is switched to the painting of the color B, the paint inflow valve 3a and the paint outflow valve 4a are closed, and the paint inflow valve 3b and the paint inflow valve 3b of the first color change valve mechanism 3 are closed. By opening the dump valve 4g of the second color change valve mechanism 4, the first and second color change valve mechanisms 3 and 3 are opened.
4 and the paint supply pipe 8 connecting the two, and the A-color paint remaining in the gear pump 7 are discharged to a waste tank via a dump valve 4g and a waste pipe (not shown), and then the dump valve 4g is closed. By opening the paint outflow valve 4b of the second color change valve mechanism 4, the B color paint from the paint supply device S2 is supplied to the paint nozzle 6b of the painting gun 5 via the paint discharge pipe 9b. Similarly, it is atomized by the high-speed rotating bell 10 and sprayed on the object to be coated.

In the same manner, it is possible to switch the coating color and perform coating with another color paint in the same manner.

In the above embodiment, 6 of A to F are used.
An example in which coating is performed by switching the type of paint has been described, but a paint inflow valve, a paint outflow valve, and a paint discharge provided in each of the color change valve mechanisms 3 and 4 according to the type and frequency of coating use of an object to be coated. It goes without saying that the number of paint nozzles provided on the pipe and the paint gun 5 can be increased or decreased.

The first color change valve mechanism 3
It is desirable to provide a cleaning liquid inflow valve connected to the cleaning liquid supply device, so that the paint remaining in the two color change valve mechanisms 3 and 4, the gear pump 7, and the paint supply pipe 8 can be cleaned.

Further, a cleaning liquid inflow valve, a cleaning liquid outflow valve and a cleaning nozzle are additionally provided in the first color change valve mechanism 3, the second color change valve mechanism 4 and the coating gun 5, respectively. It is also desirable, if necessary, to connect the cleaning liquid from the cleaning liquid supply device with the cleaning liquid inflow valve of the first color change valve mechanism 3 and the cleaning liquid of the second color change valve mechanism 4. The color change valve mechanism 3 is ejected from the washing nozzle through an outflow valve and a washing liquid supply pipe.
4. At the same time as the gear pump 7 and the paint supply pipe 8, the bell 10 of the coating gun 5 can be washed, and the intrusion of paint can be completely prevented. Further, the cleaning liquid outflow valve is closed as required, and each of the paint outflow valves 4a to 4f of the second color change valve mechanism 4 is closed.
To open the paint discharge pipes 9a to 9f.
Cleaning can also be performed.

At this time, the cleaning liquid inflow valve is upstream of each of the paint inflow valves 3a to 3f, and the cleaning liquid outflow valve is each of the paint outflow valves 4a to 4f.
It is desirable to dispose each on the downstream side of f.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing the structure of a coating apparatus according to the present invention.

FIG. 2 is a schematic explanatory view showing the structure of a conventional coating apparatus.

FIG. 3 is a schematic explanatory view showing the structure of a conventional multi-coating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coating apparatus 3 1st color change valve mechanism 3a, 3b, 3c, 3d, 3e, 3f Paint inflow valve 4 1st color change valve mechanism 4a, 4b, 4c, 4d, 4e, 4f Paint outflow valve 4g Dump valve 5 paint gun 6a, 6b, 6c, 6d, 6e, 6f paint nozzle 7 gear pump (paint pump) 8 paint feed pipe 9a, 9b, 9c, 9d, 9e, 9f paint discharge pipe S1, S2, S3, S4, S5 , S6 paint supply device

Claims (5)

[Claims] A common paint is selectively supplied through a first color change valve mechanism having a plurality of paint inflow valves respectively connected to a paint supply device for supplying paint of each color. A pump is supplied to the second color change valve mechanism by a pump, and the second color change valve mechanism is provided with a paint outflow valve provided for each color and a plurality of paint discharge pipes connected to the paint outflow valve, respectively. A paint feeding method, wherein a paint gun is discharged from a paint nozzle provided for each color. 2. A first color change valve mechanism having a plurality of paint inflow valves respectively connected to a paint supply device for supplying paints of respective colors, a paint inflow valve provided in the first color change valve mechanism. A second color change valve mechanism having the same number of paint outflow valves, a paint supply pipe connecting between the first and second color change valve mechanisms via a paint pump, and a second color change valve mechanism A coating apparatus, comprising: a plurality of paint discharge pipes respectively connected to a paint outflow valve provided in the paint gun and connecting between paint nozzles provided for each color on a coating gun. 3. A second color change valve mechanism comprising a dump valve for discharging paint remaining in the paint supply pipe and the paint pump.
Coating equipment as described. 4. The coating apparatus according to claim 3, wherein the first color change valve mechanism includes a cleaning liquid inflow valve connected to a cleaning liquid supply device that supplies a cleaning liquid for the paint. 5. A first color change valve mechanism includes a cleaning liquid inflow valve connected to a cleaning liquid supply device for supplying a cleaning liquid for a paint, a second color change valve mechanism includes a cleaning liquid outflow valve, and a coating gun. The cleaning nozzle of the coating gun and the cleaning liquid outflow valve of the second color change valve mechanism are connected to each other through a cleaning liquid supply pipe. Painting equipment.