JPS6056552B2 - Roll coater type coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating apparatus for metal strips, and particularly to a roll coater type coating apparatus.

In recent years, as coated strips have become more versatile, the need for coating equipment that can handle the production of a wide variety of products has increased.

In other words, it is necessary to repaint the coater during continuous production, and the key point is how quickly and efficiently this can be done. The present invention is equipped with two sets of coating devices, which are used alternately to quickly and efficiently change the coating.

Although detailed description will be given below, a conventional roll coater will be explained first, and then the present invention will be explained. Conventionally, this type of roll coater type painting device has a pickup roll that is semi-immersed in a paint pan and is driven to rotate, and an applicator roll that is connected to and driven to rotate by the pickup roll. The applicator roll is wound between bridle rolls and pressed against the surface of the metal strip that is continuously transferred, and the paint picked up from the pan by the pick-up roll is transferred from the applicator roll to the surface of the metal strip. It is now being painted. Hereinafter, the pickup roll and the applicator roll will be collectively referred to as the coating roll. A DC motor is used to drive the coating roll, but the location where the roll is installed is filled with solvent vapor, and there is a risk of explosion if sparks occur in the brush section, so the motor is not used directly from the roll section. They are located separately (either in a separate room or separated by a bulkhead), and the rolls are driven to rotate via a long universal joint.

In addition, when changing the paint, the coating roll must be washed once, but this cleaning requires removing the roll from contact with the strip surface, stopping the transfer of the strip, and manually cleaning the roll at that location. The line had to be stopped for a long time, making the process extremely inefficient.

Now, to explain the present invention along with the illustrated embodiment, reference numeral 1 is the center of the coating line, and the coater is a bridle roll 2 disposed along the coating line.
・A coating device 4 that applies paint to the strip 3 that is wound and transported between the rolls 2; An opener 5 that processes the strip after coating; and a cleaning device that cleans the coating roll at the moving position of the coating device. It is composed of a washing device 6.

The coating device 4 has a paint pan 7, a coating roll 8, a roll opening adjustment device 9, and an AC motor 10 for driving the rotation of the roll, which are connected to the coating line 1.
The vehicle is mounted on a truck 13 that traverses on a traveling base 12 constructed perpendicularly to the vehicle.

In addition, 11 is a universal joint. Moreover, this trolley 13 and the coating device 4 mounted on the trolley are 2
A set is provided, which can be switched and moved onto the painting line 1.

The cleaning device 6 is provided above the traveling base 12 of the truck, and is configured to wash the coating roll when the truck 13 moves outside the coating line. is formed so as to cover the entire surface of the roll, and is suspended from a support frame 17 via a cylinder 16 so as to be movable up and down.

Reference numeral 18 denotes a cleaning liquid storage tank, which is communicated with the spray gun 14 via a solenoid valve and a conduit. Reference numeral 19 indicates a drain duct disposed at the cleaning position, and 20 indicates a drain recovery tank.

Since the present invention is configured as described above, the operation is as follows. When changing the intermediate paint, first create a gap between the metal strip surface and the coating roll (the coating roll device passes through the joints of the metal strip, so the contact with the strip surface can be quickly released). drive the trolley 13 to transfer the coating device 4 currently being painted from the coating line 1 to the cleaning position, and in turn move the waiting coating device 4 to the coating line 1 to remove the coating roll. Place it in contact with the strip surface and repaint with new paint.

For the coating device that has been transferred to the washing position, when the cart reaches the washing position, the washing head 15 is lowered by the downward movement of the cylinder 16 and covers the coating roll 8, and then the high-pressure spray gun 14 is applied from above. The coating roll 8 is automatically cleaned by spraying a cleaning solution.

The drained liquid that has washed the coating roll is collected from the paint pan 7 through a duct 19 into a drained liquid recovery tank 20. The coating device 4 that has been cleaned in this manner is then placed on standby for the next paint change.

During this time, during the coating operation, the rotational speed of the AC motor 10 is controlled with the same precision as the DC motor, particularly by a variable speed drive controlled by an inverter, and during cleaning, the coating roll is controlled to slowly rotate.

As described above, according to the present invention, the cleaned coating equipment is always kept on standby for the next operation and is switched to use, so it is possible to quickly respond to paint changes, and An AC motor was used to drive the rolls, but since AC motors do not have brushes and do not produce sparks, there is no risk of explosion. Therefore, they can be installed on a trolley without being separated from the rolls. Since it is movable, it is possible to wash the coating roll while rotating it, and it has become possible to wash it automatically and efficiently.

In the above embodiment, the coating device is mounted on a cart and made movable, but it can also be supported by a rotating arm and made to swing to make it movable.

Further, the washing device can also be configured to be movable so that it can be used for each washing position.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view. 1... Center of painting line, 3... Painting strip, 4... Coating device, 6...
Washing device, 10... AC motor, 13... Trolley.

Claims (1)

[Claims] 1. A coating device using an AC motor for rotationally driving a coating roll is configured to be movable including a paint pan, and two sets of the coating device are provided so that they can be installed alternately on a painting line. Roll coater type painting equipment.