JPH0123574Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a coating roll device such as a coating roll coater.

Generally, a paint roll coater has a doctor roll and an applicator roll installed side by side, and paint is collected between them.
This is applied in a layered manner onto the outer circumferential surface of the coating roll by rotating it and transferred to the object to be coated. A coating roll coater with such a structure applies a layer of paint to the outer circumferential surface of the coating roll and applies transfer coating to the object to be coated, as described above. A coating film is formed on the surface of the coating (due to evaporation of volatile matter from the coating on the coating roll, etc.).
Due to the effect of the resulting coating film, there is a difference between the amount of coating during the first rotation and the amount of coating during the second rotation, resulting in a problem of uneven coating.
Particularly, when a highly viscous and highly volatile paint is used as a paint, the occurrence of uneven coating becomes significant.If the paint is a colored one, this uneven coating becomes a color unevenness. Since it appears over time, there was a strong desire for its elimination.

In order to solve this problem, the coating roll device shown in Japanese Utility Model Publication No. 52-52063 scrapes off the paint adhering to the coating roll with the edge of a knife that is placed upright against the coating roll circumference. . However, this device has problems in that the scraped paint adheres to the object to be coated, a lot of paint is wasted, and the cutting edge is often damaged. Not only that, stirring of the liquid is necessary to keep the liquid in the paint pool in an appropriate state, but in the above device, the liquid is stirred inside the paint pool, which is made up of a narrow weir using part of the circumference of the two rolls. There is a stirring device. However, attaching a complicated agitation device to a narrow paint reservoir is difficult to install and is not desirable from the viewpoint of maintenance.

This idea was developed in view of the above circumstances, and includes a doctor roll and a coating roll that rotates in the opposite direction to the doctor roll. The coating roll device is adapted to apply the paint onto an object to be coated by transfer coating, and is equipped with a doctor knife whose tip comes into contact with the peripheral surface of the coating roll, wherein the doctor knife is connected to the coating roll. A coating roll device characterized in that the cutting edge is brought into contact with the circumferential surface of the coating roll in a lying state by directing its tip in the rotating direction of the coating roll in the paint accumulated between the coating roll and the coating roll. This is the summary.

In other words, in this coating roll device, the coating film (high viscosity portion) generated on the outer circumferential surface of the coating roll can be scraped off into the paint using a doctor knife and mixed and dispersed into the paint. There is almost no difference between the state and the state after the second rotation, so it is possible to effectively prevent the occurrence of uneven coating during the first rotation and subsequent rotations.

Furthermore, the above-mentioned conventional problems can be solved as described below.

The blade edge of the doctor knife is in contact with the paint roll in the paint, and the paint film is scraped in the paint, so the scraped paint film is returned directly to the paint pool, reducing paint waste. There is no paint film scattering.

Since the tip of the doctor knife is immersed in the paint, effective movement of the liquid in the paint pool occurs as the paint roll rotates, and the liquid is agitated even without a special stirring device.

Since the cutting edge of the doctor knife is in contact with the blade in a flat state, there is little impact from the coating roll, and there is extremely little vibration or damage to the doctor knife.

In this way, the coating roll device of this invention has
It has many practical benefits.

Next, this invention will be explained in detail based on examples.

FIG. 1 is a block diagram of an embodiment of this invention.
That is, this coating roll device has a doctor roll 1 and a coating roll 2 that rotate in opposite directions arranged side by side, and the paint 3 is stored between the rolls 1 and 2.
A metal doctor knife 4 is provided in the paint 3 so that its tip comes into contact with the outer peripheral surface of the coating roll 2. Moreover, as shown in FIG. 1, the tip of the doctor knife is oriented in the direction of rotation of the coating roll 2, so that the cutting edge is brought into contact with the circumferential surface of the coating roll 2 in a laid-down state. Reference numeral 5 indicates a feed roll, and 6 indicates an object to be coated that is sent between the coating roll 2 and the feed roll 5 in the direction of arrow A.

In this configuration, the paint 3 accumulated between the rolls 1 and 2 adheres to the outer peripheral surface of the applicator roll 2, and due to its rotation, it is pressed against the surface of the object to be painted 6 that is being fed in the direction of arrow A, resulting in a coating film. become In this case, since the doctor knife 4 is provided in the paint 3 with its tip in contact with the outer peripheral surface of the coating roll 2, a coating film ( The high viscosity portion) is scraped off in the paint 3 and becomes mixed and dispersed in the paint 3. Therefore, the condition of the outer circumferential surface of the application roll 2 remains almost unchanged between the first rotation and the second and subsequent rotations. Therefore, uneven coating hardly occurs during the first rotation and during subsequent rotations.

In the above embodiment, the doctor knife 4 is made of metal, but it may be made of plastic or the like. Also, its shape is
It is preferable that the tip part is set as thin as possible.

As mentioned above, the coating roll device of this invention is
By having an extremely simple structure in which the tip of the doctor knife is brought into contact with the paint roll while lying flat in the paint solution, it not only effectively eliminates uneven paint film, wasted paint, and paint scattering, but also has a separate In any case, the liquid in the paint pool can be stirred without the need for a stirring mechanism, and vibration and damage to the doctor knife can be suppressed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of this invention. 1...Doctor roll, 2...Applying roll, 3
...Paint, 4...Doctor knife, 5...Feed roll, 6...Object to be painted.

Claims (1)

[Scope of utility model registration request] It is equipped with a doctor roll and an applicator roll that rotates in the opposite direction, and the paint is collected between the doctor roll and the applicator roll, and as the applicator roll rotates, the paint is transferred onto the object to be coated. and a doctor knife whose tip contacts the circumferential surface of the applicator roll, wherein the doctor knife applies the tip of the doctor knife in the paint accumulated between the doctor roll and the applicator roll. A coating roll device characterized in that the blade edge is brought into contact with the circumferential surface of the coating roll in a lying state by being oriented in the rotational direction of the roll.