JPH04210272A - Method for continuously coating plate - Google Patents

Abstract

PURPOSE:To form a uniform film by supplying a dummy plate to a conveyor line whenever a plate is supplied to the line and supplying the plate when the preceding dummy plate passes the position of a coating means. CONSTITUTION:A coating soln. is continuously supplied from a coating head 6 on a group of plates 11-1n continuously supplied on a conveyor line and serially traveling on the line. Dummy plates 21-2n are supplied to the line whenever the plates 11-1n are supplied to the line, and the plates 11-1n are supplied to the line when the preceding dummy plates 21-2n pass the position of the coating head 6. Consequently, the coating soln. is uniformly applied on the plate surface without being disturbed by the shock produced when the plate is supplied, and a high-quality plate coated with a uniform film is stably obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a continuous coating method for a group of plate-like bodies that continuously travel on a line.

[Conventional technology]

Glass that selectively transmits light in a certain desired wavelength range, that is, an optical filter, is widely used in optical equipment such as cameras, televisions, lasers, display equipment, and the like. This optical filter is manufactured by adding a colorant to a glass raw material to cause light absorption, or by laminating a dielectric film with a high refractive index and a dielectric film with a low refractive index on a glass substrate. In addition, for example, in the case of glass plates used for displays (displays) on LCD televisions, computers, etc., attempts have been made to apply a special coating to the glass surface layer to increase the contrast in order to make the displays easier to see. There is.

In this way, for example, plate-shaped bodies such as glass, which have been subjected to coating film treatment, are used in various legal fields depending on the purpose.

In order to obtain the above-mentioned surface coating material, a coating film treatment is performed using a continuous coating device as shown in FIG. 4, for example. The continuous coating device feeds the plate-like body 13 to be coated by a plate-like body to be coated 13 to be fed to rollers 12.1 by a plate-like body to be coated supplying means 11 driven by a cylinder or the like (not shown).
2... Continuously supplied to the top and continuously traveling in series on the line, using coating means such as the coating head 14,
The coating liquid is continuously applied to the surfaces of the plate-like groups 13, 13, . . . to be coated which travel in a band shape. The coated plate 13 that has been subjected to the coating film treatment is then discharged out of the line by a coated plate discharge means 16.

[Problem to be solved by the invention]

When coating a plate-like object such as glass, as mentioned above, apply the coating continuously so that the leading end of the next glass plate is in close contact with the rear end of the preceding glass plate on the feed roller. However, due to the impact when connecting to the rear end of the preceding glass plate, uneven coating A occurs at the coating section as shown in Figure 5. was.

This coating unevenness A is caused by concavities in the thin film portion formed when the glass plate-like body 13, which is continuously traveling at a constant speed, is suddenly pushed out in the direction of travel after receiving the impact during the supply, and the subsequent Due to the reaction, an excessively thick white part is continuously formed in the advancing part.

Conventionally, in order to suppress this coating unevenness A, by controlling the supply extrusion speed of the plate-shaped object to be coated,
Although attempts were made to alleviate the impact during connection, this countermeasure method could not completely eliminate the impact during connection, and uneven coating A still occurred on the surface of the plate-like object to be coated.

Therefore, an object of the present invention is to provide a continuous coating method that can eliminate coating unevenness that occurs on the surface of a plate to be coated due to impact when the plate is supplied, and can obtain a coated plate of good quality with a uniform coating film. Our goal is to provide the following.

[Means to solve the problem]

The above problem is for a group of plate-shaped bodies that are continuously supplied onto a conveyance line and continuously run in a series belt shape on this conveyance line.
In a continuous coating method in which a coating liquid is continuously applied by a coating means, a dummy plate-like body is supplied to the conveyance line every time a plate-like body is supplied to the conveyance line, and the line supply of these plate-like bodies is carried out using a preceding dummy plate. This problem can be solved by performing the process when the plate-shaped body passes through the coating means installation position.

[Effect]

In the present invention, when supplying the plate-shaped body to the conveyance line, the line is supplied together with the dummy plate-shaped body,
Dummy plate-like bodies are interposed at predetermined intervals between a group of plate-like bodies that continuously run in a series band shape on the line. The application of the coating liquid is performed continuously on the group of plate-like bodies including the dummy plate-like body, but in the present invention, the line supply of the plate-like body together with the dummy plate-like body is performed on the preceding dummy plate-like body. This is done when the body passes through the application means placement position. Therefore, it is possible to limit coating unevenness at the application section caused by impact during supply of the plate-shaped body to the dummy plate-shaped body.
The plate-shaped body produced as a product can be a coated plate-shaped body of high quality with a uniform film thickness without coating unevenness.

[Specific structure of the invention]

The present invention will be explained in detail below based on the embodiment shown in FIG.

FIG. 1 shows a continuous coating line diagram of a plate-shaped body according to the present invention.

For example, when continuously coating a plate-like object such as a glass plate, the continuous coating line continuously supplies the glass plate-like object 1 onto feed rollers 5.5 constituting a conveyance means,
The coating liquid is continuously applied from the coating head 6 to the glass plate-like bodies 1, (1), .

The glass plate 1 is fed onto the feed roller 5.5 by a supply arm 3 that can move forward and backward in the horizontal direction in the drawing by adjusting the expansion and contraction of the cylinder 4. The advancement length of the feed arm 3 is adjusted so that the tip of the supplied glass plate 1° comes into close contact with the rear end of the glass plate body 1o-1, and the impact at the time of feeding is adjusted as much as possible. Adjustments to the delivery speed are made.

In the coating method of the present invention, when the glass plate-like body 1 is supplied, the dummy plate-like body 2o is attached to the glass plate-like body 1.
, and are supplied on the line.

The dummy plate-like body 2 may be made of the same material as the glass plate-like body 1, or may be made of a different material. However, from the viewpoint of coating, it is desirable that the thickness be at least the same.

On the other hand, the coating head 6 has a pocket 6a for supplying the coating liquid inside thereof and a slit 6b communicating from the pocket 6a to the discharge port, and the coating liquid is fed into the pocket 6a by a pressure feeding means (not shown). The coating liquid is applied onto the glass plate 1 through the slit 6b. Note that the application means is not limited to the application means such as the application head 6, and may be, for example, application means such as applicator application.

Thereafter, the glass plate-shaped body 1 on which the coating film 7 has been formed on the surface layer by the coating head 6 is discharged out of the line by the discharge arm 8 at the end portion of the feed roller group 5.5.

By the way, when supplying the plate-like body 1 and the dummy plate-like body 2o onto the conveyance line, in order to supply the plate-like body 1 and the dummy plate-like body 2o when the preceding dummy plate-like body 2 passes the coating means 6 arrangement position, the main In the continuous coating line of the invention, the glass plate j is placed in the Y section of the feed rollers 5.5, . A supply timing detection means 9 is provided to measure the supply timing of the dummy plate-shaped body 2 and the dummy plate-like body 2. The supply timing detecting means 9 has a light emitting element 9a such as a light emitting diode and a light receiving element 9b thereof facing each other with the glass plate 1 in between, and the glass plate 1 which has been coated, The next glass plate-shaped body 1. is generated when the glass is discharged out of the line by the discharge arm 8. +1 is sensed and the signal is sent to the controller 10.

The controller IO controls the cylinder 4 based on the line feed speed known in advance and the data on the position of the dummy plate 2 between the glass plates 1 and 1 from the supply timing detection means 9.
The driving timing of the dummy plate-shaped body 2 is
When the 6th position is reached, the glass plate-shaped body 1° and the dummy plate-shaped body 2. , the connection is made.

In this embodiment, the supply timing detecting means 9 is provided to ensure the supply timing, but the line feed speed and the supply cycle time of the glass plate 1 are adjusted to ensure that the supply timing is constant. If the timing is set when the dummy plate-shaped body 2 comes to the coating sluice 86 position, there is no particular need to provide the supply timing detection means 9.

Further, the dummy plate-like body 2 does not necessarily include each coated plate-like body 1.
1... (For example, as shown in FIG. It is sufficient to intervene.

As shown in FIG. 2, the glass plate-like body 1 obtained by such a continuous plate-like coating apparatus has a coating unevenness A that is limited to the dummy plate-like bodies 2 placed side by side, so that the portion used as a product is That is, the glass plate portion 1 becomes the glass plate 1 having a uniform film thickness without coating unevenness A.

〔Effect of the invention〕

As explained in detail above, according to the present invention, it is possible to eliminate coating unevenness due to impact during supply of a plate-shaped body, and to stably obtain a high-quality coated plate-shaped body on which a uniform coating film is formed.

[Brief explanation of the drawing]

FIG. 1 is a continuous coating line diagram of a plate-shaped body according to the present invention, FIG. 2 is a diagram of a coating situation by the continuous coating line of FIG. 1, and FIG. 3 is a diagram showing a modification of the intervening pattern of dummy plate-shaped bodies. FIG. 4 is a diagram of a conventional continuous coating line for a plate-shaped object, and FIG. 4 is a diagram of a coating situation using the continuous coating line of FIG. 1...Glass plate-shaped body, 2...-dummy plate-shaped body, 3...
... Supply arm, 4... Cylinder, 5... Feed roller, 6... Application head, 7... Paint film, 8...
Discharge arm, 9... Supply timing detection means, 10.
...Controller, A...Uneven coating

Claims (1)

[Claims] (1) In a continuous coating method in which a coating liquid is continuously applied by a coating means to a group of plate-like bodies that are continuously supplied onto a conveyance line and continuously run in a series strip on this conveyance line, a plate-like body A dummy plate-like body is supplied to the conveyance line every time the conveyance line is supplied, and the line supply of these plate-like bodies is performed when the preceding dummy plate-like body passes through the coating means arrangement position. A method for continuously applying a plate-like material.