JPS6154253A - Device for coating liquid - Google Patents

Abstract

PURPOSE:To coat uniformly without providing an agitator by providing ruggedness for agitating liquid on the surface of a coating roller when a liquid paint is coated on a body to be coated by transferring the paint onto a transfer roller through the coating roller. CONSTITUTION:A coating roll 1 is immersed in a liquid paint 5 in a paint vessel 4, and the paint 5 is transferred onto a transfer roll 2 by rotating the coating roll 1. The paint 5 is coated on a body 3 to be coated by the transfer roll 2. In this device, a spiral groove is formed on the surface of the coating roll 1 to provide continuous spiral ruggedness 1a. Consequently, since the paint 5 is agitated by the rotation of the painting roll 1 and simultaneously the paint 5 is transferred to the transfer roll 2, the paint 5 is always kept at a fixed concn., and the body 3 to be coated is coated in specified film thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a liquid coating device, and particularly to a liquid coating device that immerses a coating roller in a liquid and applies the liquid adhering to the surface of the roller to an object to be coated.

[Prior Art] Conventionally, this type of device has been known as a device that supplies ink to the printing roller of a printing machine, or a device that transfers paint to an object to be coated in a painting device, etc. In many cases, the coating roller is immersed in a paint tank, and the liquid adhering to the coating roller is applied via a transfer roller or directly onto the object to be coated.

In conventional devices of this kind, a device for stirring the liquid (such as paint) is used in a liquid tank to prevent the liquid (such as paint) from forming precipitates or coagulating, resulting in uneven application. Many devices are installed inside the
Therefore, a means for driving the stirring device is required, which has the drawback of making the device complicated and expensive.

Further, there is a problem in that uniform application cannot be expected with an apparatus not provided with such a stirring device.

[Purpose] The present invention has been made in view of the above conventional problems, and
It is an object of the present invention to provide a liquid coating device capable of uniformly coating a liquid while stirring the liquid with a simple and inexpensive configuration.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 shows an embodiment of a liquid coating device according to the present invention.

The embodiment shown in FIG. 1 shows an apparatus for applying paint to the surface of a cylindrical object 3 to be coated.

What is indicated by the symbol 4 in Fig. 1 is the paint tank.
A liquid paint 5 is contained in this paint tank.

An applicator roller 1 is immersed in the paint 5 in the paint tank 4, and a transfer roller 2 is rotatably supported so as to be in contact with the applicator roller 1. Further, a cylindrical object 3 to be coated is in contact with the transfer roller 2 so as to be rotatable.

The application roller 1 is formed as shown in FIG. As shown in FIG. 2, continuous spiral grooves 1a are formed on the surface of the application roller 1 by forming spiral grooves. The application roller 1 may be integrally formed from resin or the like, or may be formed by coating a metal shaft with an elastic material such as rubber.

In the above configuration, when the coating roller 1 is rotated by a drive means (not shown), the unevenness 1a on the surface of the coating roller 1 moves the coating material 5 in the coating tank 4 along the spiral shape, and agitates the coating material 5. At the same time, the paint adhering to the surface of the application roller 1 is transferred to the transfer roller 2, and further adhered to the object to be coated 3 via the transfer roller.

Since the paint 5 in the paint tank 4 is stirred by the application roller 1, its concentration is always maintained constant, and the paint can be applied to the object 3 to be coated with a constant film thickness via the transfer roller 2. .

According to such an embodiment, the paint 5 in the paint tank 4 can be stirred by the application roller 1 without providing a separate stirring device, and the construction becomes very simple and inexpensive.

In the above embodiment, a configuration was shown in which the paint is applied to a cylindrical object to be coated 3, but according to the configuration shown in FIG. It is possible to do so.

FIG. 3 shows an apparatus for applying paint to a long sheet body wound around a take-up reroller.

In FIG. 3, the same members as in FIG. 1 are designated by the same reference numerals, and detailed explanations thereof will be omitted.

In FIG. 3, the reference numeral 3' indicates a transfer roller having the same structure as the transfer roller 2, or a printing roller having letters or the like formed on its surface. A platen roller 8 whose surface is coated with a D layer made of an elastic material such as rubber is disposed at a position facing the roller 3' and pressed against the roller 3' by a predetermined pressure contact force. A sheet body 9 is passing between rollers 8. The sheet body 9 is wound around left and right take-up rerollers 6 and 7, and the sheet body 9 is conveyed by rotationally driving either of these take-up rerollers 6 (7). Also, appropriate tension is applied to the sheet body 9 by right and left pinch rollers 10, 10 so that the sheet body 9 passes straight between the roller 3' and the platen mee 98.

In the above configuration, when the coating roller 1 is rotated while conveying the sheet body 9, the coating roller 1 agitates the coating material 5 and supplies the coating material to the roller 3' via the transfer roller 2. The applied paint is sequentially and uniformly applied to the surface of the sheet body 9 so as to have a constant film thickness.

Of course, in this case as well, the paint 5 is constantly stirred by the stirring function of the coating roller 1, making it possible to apply the paint evenly.

In FIG. 3, paint is supplied to roller 3' via transfer roller 2, but pinch rollers 10 and 10 are provided at the positions shown by broken lines in the figure, and pinch rollers 10 and 10 are provided between transfer roller 2 and roller 3'. If the sheet material 9 is configured to pass through, the number of rollers can be reduced by one, and the same coating operation can be performed.

Although the configuration for applying paint to a cylindrical or sheet-like object has been exemplified above, the technology of the present invention is not limited to paint application equipment, but can be applied to various liquid application equipment such as chemicals and inks. It can be widely used.

[Effects] As is clear from the above description, according to the present invention, the application roller is immersed in the liquid, and by rotating this roller, the liquid is transferred to the surface of the application roller, and this liquid is transferred directly or indirectly. In a liquid application device that makes contact with an object to be coated and deposits the liquid, a structure is adopted in which the surface of the coating cola is provided with unevenness for stirring the liquid, so that application can be performed while stirring the liquid with a simple and inexpensive structure. Accordingly, it is possible to provide an excellent liquid coating device that can uniformly apply liquid to an object to be coated.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the configuration of a paint coating device employing the present invention, Fig. 2 is a side view showing the configuration of the coating roller in Fig. 1, and Fig. 3 is a different paint application method according to the present invention. FIG. 2 is an explanatory diagram showing one embodiment of the device. 1... Application roller 2... Transfer roller 3...
Object to be coated 4...Paint tank 5...Paint
8...Platen roller 9...Sheet body Fig. 1 Fig. 3

Claims (1)

[Claims] In a liquid coating device in which a coating roller is immersed in a liquid, rotated to transfer the liquid onto the surface of the coating roller, and then directly or indirectly contacts and coats the object to be coated, a liquid stirring device is provided on the surface of the coating roller. A liquid coating device characterized by having unevenness.