JPS5858149B2 - Color change device for powder coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color changing device for an electrostatic powder coating apparatus, and more particularly to a color changing device that automatically extracts a large number of colors.

Conventionally, as a means for automatically taking out powder paints having a large number of colors, which has been generally used, for example, hoses corresponding to the number of colored powder paints are arranged in a disk shape and selected appropriately. In the past, it was difficult to increase the size of equipment.

The present invention eliminates the above-mentioned deficiencies by arranging quick joints in a matrix, each having a switching valve that allows the hose on the spray gun side to be freely attached and detached.

Hereinafter, the present invention will be explained with reference to drawings of embodiments.

Separators 1 are led from main hoppers (not shown) according to the number of colors of the colored powder coating, and a booth site hopper 2 is attached to each sehalator 1, and a booth site hopper 2 is installed at the tip of each booth side hopper 2. Switching valves 4 are arranged in a grid pattern through injector cut valves 3, and 5 groups of color change valves provided at positions opposite to the switching valves 4 are arranged in a matrix arrangement in a vertical and horizontal direction.

This color change valve 5 is, for example, a vertically arranged positioning bin A.

B, C, D, E and horizontally arranged positioning bins a and b.

Selection is possible by combining C, d, and e.

That is, 25 colors in 5 rows and 5 stages can be used.

Reference numeral 6 denotes a transfer head that self-propelled and slides vertically and horizontally on the surface of the color change valve 5 arranged in a matrix, and a spray gun 8 is connected to the transfer head 6 via a hose 7.

In the figure, 9 indicates system control, 10 indicates switching valve control, 11 indicates cleaning control, and 12 indicates color change command.

Next, to explain this operation, first, by pressing the paint color selection push button of the color change command 12 appropriately, the back of the color change valve 5 is transferred to the transfer head 6 connected to the appropriate color change valve 5. Cleaning air flows in from the cleaning air path 4a of the switching valve 4 to clean the inside of the hose 7 and spray gun 8.

Next, the injector cut valve 3 is turned on, and the powder paint in the booth side hopper 2 fed out from the main hopper is sucked and guided to the switching valve 4.
In this case, when the spray gun 8 is OFF, the switching valve 4 has not yet been linked to the color change valve 5 side, so the switching valve 4 is connected to the front stage of the booth side hopper 2 via a branched circulation path 13. It is returned to the first part of the separator and circulated.

After this, the positioning pins AB and AB corresponding to the commanded colors protrude, and the transfer head 6 moves horizontally and vertically by the drive of the air cylinder and stops at the desired positioning pins. (Lock) The transfer head 6 and color change valve 5 are connected.

Next, when the trigger of the spray gun 8 is turned ON, the switching valve 4 is activated, and the booth side hopper 2
The circulation of the powder paint that has flowed out and circulated to the separator 1 section is switched, the switching valve 4 and the color change valve 5 communicate with each other, and the powder paint is supplied to the spray gun 8 via the transfer head 6 and is sprayed. Become something.

Next, the spraying process is completed and the trigger of the ugly spray gun 8 is turned off.
If it becomes FF, the switching valve 4 is switched in the opposite direction to the above, and the powder paint from the spray gun 8 side is directed to the circulation path 13, and a small amount of the powder paint from the separator 1 is sent to the booth side hopper 2, which has the minimum required powder capacity. It will be a return to the department.

Thereafter, if the paint color selection button of the color change command 12 for another colored paint is pressed, the above steps are repeated in sequence, and then the transfer head 6 moves to each positioning pin AB... and AB...
The transfer head 6 that stops at a predetermined location and communicates with the spray gun 8 is brought into contact with the color change valve 5, and the powder paint is supplied to the spray gun 8.

As described above, the present invention arranges the switching valves corresponding to the booth side hoppers according to the number of colors of the colored paint and the color change valves integrated therein in a grid pattern in a matrix arrangement, and the surface of the color change valves is connected to the spray gun. Since the transfer head on the side can be moved vertically and horizontally, it can be arranged compactly even with a large number of colors. Therefore, it can be installed next to the painting booth, and the distance from the spray gun can be maintained as much as possible, and residual paint inside the hose can be prevented. Since only a small amount is required and the spray is stabilized, a small installation area can be maintained.

For example, if 25 colors are arranged in 5 rows and 5 stages as shown in the figure, the selection movement time can be reduced by combining horizontal movement and vertical movement.

In addition, color change on the line can be done in a short time and within the time it takes for the object to be coated to move, so it has the advantage of being able to perform effective coating.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a system diagram, and FIG. 2 is a plan view showing the main parts of the color change valve section. 1... Separator, 2... Booth side hopper, 3... Injector cut valve, 4... Switching valve, 5... Color change Valve, 6...Transfer head, 7...Hose, 8...Spray gun.

Claims (1)

[Claims] 1. A side hopper branched from the main hopper and a circulation path including the side hopper are provided with a desired number of switching valves that control the supply of powder coating to the spray gun and communication with the circulation path. Depending on the selection of the switching valve, In electrostatic powder coating equipment that sprays specified colors, switching valves are arranged in a grid pattern,
Select the desired position of the switching valve by moving the movable joint vertically and horizontally, which connects and disconnects the connection port of the switching valve to connect and disconnect it.
A color changing device for a powder coating device, characterized in that a side hopper side and a spray gun side connected to a movable joint are connected in a sliding manner.