JPH06226154A - Coating apparatus - Google Patents

Abstract

PURPOSE:To obtain various coating color states by using the min. number of coating materials without mixing the coating materials beforehand. CONSTITUTION:A white intercoat coating material supplied to a quantitative control device 7 through a coating material supply pipe 5 and a black intercoat coating material supplied to a quantitative control device 8 through a coating material supply pipe 6 are respectively controlled to indicated amts. by a controller 9 to be supplied to a bell-shaped coater 14. By the use ratio of both coating materials achromatic color coating of various brightnesses is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for applying a paint to an object to be coated, and more particularly to a coating apparatus suitable for use as an intermediate coating for automobiles.

[0002]

2. Description of the Related Art Conventionally, in the coating of automobiles, it has been devised that an intermediate coating is carried out before the top coating is carried out so that the finish of the top coating is good.
In recent years, in order to improve the appearance of a vehicle body, the types of paints used for top coating have become rich and the quality thereof has been improved. As a result of the emphasis on high saturation and transparency, there is a problem that the intermediate coating material as a base is easily seen through.

On the other hand, it is known that the above problems are less likely to occur when the difference in brightness between the top coating and the intermediate coating is small. Therefore, generally, five types (or several colors of these) are individually prepared as the intermediate coating material, and a coating material suitable for the brightness of the top coating material is selected and used each time. Specifically, the following five achromatic colors having different lightness, that is, black (lightness N = 1),
Dark gray (lightness N = 2), gray (lightness N = 3),
Light gray (brightness N = 4), white (brightness N = 5)
The intermediate coating paint is sent individually to the color change valve using the intermediate coating supply pipe, and the color change valve is installed so that the one with the smallest brightness difference from the top coating material is supplied to the coating gun. It was switched. However, according to this method, a large amount of intermediate coating material and piping equipment must be prepared, which is disadvantageous in that the cost is high and the management is difficult. On the other hand, a method has been proposed in which two kinds of a white type intermediate coating material and a black type intermediate coating material are prepared, and both the coating materials are mixed according to the brightness of the top coating material (Japanese Patent Publication No. 4-53595).

[0004]

According to this method, the number of intermediate coating paint pipes can be reduced, but since a mixing device for mixing both paints is required, it is necessary to change the brightness of the top coating paint every time. It is necessary to clean the mixing device, and if the cleaning is not performed sufficiently, there is a possibility that color mixing of the paint may occur.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coating apparatus which uses a minimum number of coating materials and finishes various coating color states without mixing them in advance. I am trying.

[0006]

In order to solve the above problems, in the invention described in claim 1, a coating gun for spraying the supplied paint while stirring by a rotating operation, and a plurality of paints are provided. A plurality of paint supply paths for supplying to each of the coating guns, a control means for setting a use ratio of each of the paints, and outputting a use amount control signal corresponding to the use ratio, and an intermediary of each of the paint supply paths. And a plurality of paint-specific adjusting means for supplying the paint to the coating gun based on the use amount control signal corresponding to the paint.

Further, in the invention according to claim 2,
In the invention according to claim 1, each of the paint supply paths is
It is characterized in that white and black paints are supplied to the painting gun. Further, in the invention according to claim 3, in the invention according to claim 1, each of the paint supply paths is
It is characterized in that red, yellow, blue, and white primary color paints are supplied to the coating gun.

[0008]

The plurality of paints supplied to each paint-by-paint preparation means through the plurality of paint supply paths are based on the use amount control signal corresponding to the use ratio of each paint set by the control means.
It is supplied to each coating gun by each paint-based preparation means. Therefore, various paint colors can be obtained depending on the usage ratio of each paint. According to the second aspect of the present invention, the paints of white and black are supplied to the coating gun, and the paint color is finished with various brightness depending on the usage ratio of each paint. Further, claim 3
In the invention described in (3), the primary color paints of red, yellow, blue, and white are supplied to the coating gun, and the coating colors of all colors are finished depending on the usage ratio of each coating material.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

§1. First Embodiment A: Structure of Embodiment FIG. 1 is a diagram showing the structure of a coating apparatus in the same embodiment of the present invention. In the figure, 1 is a white-based intermediate coating paint storage tank, and 2 is a black-based intermediate coating paint storage tank. The tanks 1 and 2 store a white intermediate coating material A and a black intermediate coating material B, which have the same base material and are mixed with carbon black (black pigment) at different ratios. Then, the white intermediate coating material A is discharged by the discharge pump 3 to the coating material supply pipe 5 at a predetermined pressure, while the black intermediate coating material B is discharged by the discharge pump 4 to the coating material supply pipe 6 at a predetermined pressure.

Next, 7 and 8 are quantitative preparation devices, and the white-based intermediate coating material A and the black-based intermediate coating material B are supplied through the coating material supply pipes 5 and 6, respectively. Reference numeral 9 is a controller, which reads the vehicle body information of the vehicle 16 to be coated by the reading device 1.
5 is input, the use ratios of the white type intermediate coating material A and the black type intermediate coating material B for the intermediate coating are set based on the same information. Then, the controller controls the quantitative preparation devices 7 and 8 to supply designated amounts of the paints A and B to the paint supply pipes 12 and 13, respectively. Further, paint return pipes 10 and 11 are provided, and unnecessary parts of the paints A and B are returned to the white-based intermediate coating paint storage tank 1 and the black-based intermediate coating paint storage tank 2, respectively.

The paint supply pipes 12 and 13 are connected to a bell type coater 14. FIG. 2 shows a bell-type coating device 14.
It is a figure explaining the structure of. In the figure, the paint supply pipe 1
2 is connected to the paint supply nozzle 17 inside the gun body 14b of the bell-type coater 14. The nozzle 17 has an injection port located inside the bell cup 14 a of the bell-type coating device 14. Further, another paint supply nozzle 18 is provided at a position symmetrical to the nozzle 17 with respect to the shaft 20, and is similarly connected to the paint supply pipe 13 inside the gun body 14b. Further, 19 is an air supply port, and when the bell cup 14a is rotated to eject the paint, high-pressure air is ejected in the same direction as the paint, thereby improving the coating efficiency.

B: Operation of Embodiment With the above configuration, the white-based intermediate coating material A is controlled by the controller 9 based on the vehicle body information of the vehicle 16 to be coated.
Then, the black intermediate coating material B is supplied to the bell-type coating device 14 at a predetermined ratio so that the specified color is obtained when mixed. When the bell cup 14a rotates, the paint supply nozzle 1
The white intermediate coating material A ejected from 7 and the black intermediate coating material B ejected from the coating material supply nozzle 18 are ejected while being agitated and mixed. Further, since the high-pressure air flows in the same direction, the paint is vigorously ejected, and the vehicle body of the painting target vehicle 16 is painted in the designated color.

Next, when the vehicle to be coated is changed and new vehicle body information is input to the controller 9 by the reading device 15, the controller 9 newly updates the usage ratio of both paints A and B corresponding to the designated color for the vehicle. The control signal is output to the quantitative preparation devices 7 and 8. Then, the bell type painter 14 paints the vehicle body with a new designated color.

That is, according to this method, it is possible to prepare two kinds of paints and their piping equipment, but it is not necessary to prepare a mixer before the coater, and
Since no cleaning operation is required, the equipment cost can be reduced and the management is very easy.

§2. Second Embodiment A: Structure of Embodiment FIG. 3 is a diagram showing the structure of a coating apparatus in the same embodiment of the present invention. In the figure, 21 is a red primary color paint storage tank, 22 is a yellow primary color paint storage tank, 23 is a blue primary color paint storage tank, and 24 is a white primary color paint storage tank.
In this embodiment, four types of paint storage tanks and their related equipment are provided in place of the paint storage tanks 1 and 2 in the first embodiment, and the basic configuration and operation are the same as in the first embodiment. Is.

That is, the above-mentioned primary color paints are discharged to the paint supply pipes 29, 30, 31, 32 at a predetermined pressure by the corresponding discharge pumps 25, 26, 27, 28, and the corresponding quantitative preparation devices 33 are provided. , 34, 35, 36.

Reference numeral 9'denotes a controller, and when the vehicle body information of the vehicle 16 to be coated is input by the reading device 15, the use ratio of each paint is set based on the information. Then, each of the above quantitative preparation devices is controlled by the controller 9 ', and each paint is supplied to the paint supply pipes 41, 42, 43, 44 in a designated amount. In addition, the paint return pipe 3
7, 38, 39, 40 are provided, and the unnecessary part of each paint is returned to each storage tank.

The paint supply pipes 41, 42, 43, 4
4 is connected to a bell-type coater 14 '. The structure of the bell type coater 14 'is the same as that of the four paint supply nozzles connected to each paint supply pipe at equal intervals.
It is no different from the bell-type coater 14 shown in FIG.

B: Operation of the Embodiment With the above-described configuration, as in the first embodiment, the red, yellow, blue, and white primary color paints are supplied to the bell-type applicator 14 ′ at a predetermined ratio. Then, when the bell cup rotates, the paints ejected from the nozzles are ejected while being stirred and mixed.
That is, according to this method, it is possible to paint the vehicle body in all colors by preparing paints of three primary colors (red, yellow, blue) and four primary colors of white and piping equipment therefor. Further, as in the first embodiment, it is not necessary to prepare a mixer before the coating device, so that the facility cost can be suppressed and the management becomes easy.

The construction of each of the embodiments described above can be applied to various coating operations such as intermediate coating and top coating. Further, the number of paint supply nozzles provided inside the bell-type coater may be set to an appropriate number according to the specifications of painting.

[0022]

As described above, according to the present invention, by providing the minimum number of paints and the supply equipment for the paints, it is possible to finish the painting work in various paint color states without mixing them in advance. Is possible.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a coating apparatus according to a first embodiment of the present invention.

FIG. 2 is an internal configuration diagram of a bell-type coating device according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a coating apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

5, 6, 12, 13, 29, 30, 31, 32, 41,
42, 43, 44 ... Paint supply pipe (paint supply passage) 7, 8, 33, 34, 35, 36 ... Quantitative preparation device (paint-specific preparation means) 9, 9 '... Controller (control means) 14, 14' ... Bell type painter (painting gun)

Claims (3)

[Claims] 1. A coating gun for spraying the supplied coating material while agitating the rotating coating material, a plurality of coating material supply paths for supplying a plurality of coating materials to the coating gun, and a usage ratio of each coating material. A control means for outputting a usage amount control signal corresponding to the usage ratio, and a coating means which is inserted in each of the paint supply paths and supplies the coating material to the coating gun based on the usage amount control signal corresponding to the coating material. And a plurality of paint-specific adjusting means for controlling the coating apparatus. 2. The paint supply passages supply paints of white and black colors to the coating gun, respectively.
The described coating equipment. 3. The coating apparatus according to claim 1, wherein each of the coating material supply paths supplies each of the primary color coating materials of red, yellow, blue and white to the coating gun.