JP2000070820A - Paint application equipment - Google Patents

Abstract

(57) [Summary] [Problem] To facilitate the control of the amount of application of a transparent paint such as a varnish by using a nozzle, to realize a stable application work without coating unevenness, and to adhere the transparent paint. Also improves the performance. SOLUTION: Continuous paper 1 to which a transparent paint is applied is transferred by transfer rollers 12 and 13, and a nozzle 15 is arranged corresponding to a transfer path of the continuous paper 1 so that the transparent paint supplied from a pump is supplied by the nozzle 15. Two pairs of upper and lower rollers 20a, 20b, 21a, and 2 having different circumferential lengths are applied to one surface of continuous paper.
The printing pressure is applied in 1b to apply the transparent paint evenly to the continuous paper 1 and to make sure it is in close contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint applying apparatus for applying a transparent paint such as silicon or varnish to continuous paper.
In particular, the present invention relates to a paint application device that applies a transparent paint using a nozzle.

[0002]

2. Description of the Related Art Conventionally, in order to apply a transparent paint such as silicon or varnish to continuous paper, usually, a transparent paint is supplied to a coating roller through a plurality of rollers as in a printing machine, The transparent paint is applied to the continuous paper surface. In addition, when the application amount is large or small, the amount of ink supplied from the ink fountain is adjusted to maintain a constant amount.

[0003]

In a paint coating apparatus using a plurality of rollers such as a coating roller as in a conventional printing machine, the influence of environmental conditions such as the rotation speed of each roller, temperature, humidity, etc. Therefore, there is an inconvenience that control of the supply amount of the transparent paint to the application roller, that is, control of the application amount of the transparent paint, is complicated and difficult.

On the other hand, in a paint application device using a nozzle,
Since the paint is supplied directly to the nozzles, it is relatively easy to control the amount of application, and there is no problem if the amount of application is large, but it was applied to an application device that applies transparent paint such as silicon or varnish to continuous paper. In such a case, there was a problem that coating unevenness occurred and the adhesion was inferior to that of a printing machine. For example, when a transparent paint is applied to protect the magnetic stripe, if there is a problem in application unevenness or adhesion, there is a possibility that reading accuracy may be adversely affected.

The present invention eliminates such inconveniences, facilitates control of the amount of coating using a nozzle, realizes a stable coating operation without coating unevenness, and improves the adhesion of a transparent coating. And a paint application device.

[0006]

In order to achieve this object, a paint applying apparatus according to the first aspect of the present invention comprises a sheet transferring means for transferring a continuous sheet to which a transparent paint is applied, and the sheet transferring means. A nozzle corresponding to the transfer path of the continuous paper transported by the nozzle, and applying a transparent paint supplied from a pump to the surface of the continuous paper by the nozzle; And a printing pressure applying means for applying a printing pressure by a roller in order to bring the transparent paint applied to the surface into close contact.

According to another aspect of the present invention, there is provided a paint applying apparatus, wherein a plurality of upper and lower pairs of rollers are spaced apart in a continuous paper transport direction as the printing pressure applying means. It is characterized by being arranged and configured.

Further, in order to achieve the above object, a paint coating apparatus according to a third aspect of the present invention is characterized in that the plurality of pairs of rollers have different circumferential lengths.

[0009]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a schematic side view showing a paint application apparatus, FIG. 2 is a schematic explanatory view showing a transparent paint supply system, and FIG. 3 is a schematic view showing a part of continuous paper to be applied. It is a top view.

First, a continuous paper to which a transparent paint, for example, a varnish is applied, will be described with reference to FIG. The continuous paper 1 is provided with a coating layer 2 formed by applying a coating material in a belt shape in parallel at equal intervals on one surface side. These coating layers 2 extend in the longitudinal direction of the continuous paper 1. In order to protect the coating layers 2, a varnish is applied in a strip shape so as to cover the respective coating layers 2.

Next, the paint application device will be described.
As shown in FIG. 1, the paint application device 11 includes transfer rollers 12 and 13 as sheet transfer means for transferring the continuous sheet 1. A nozzle block 14 is arranged so as to cross the continuous path of the continuous paper 1 transported by the transport rollers 12 and 13 so as to cross the transport path. The nozzle block 14 is provided with five nozzle holes 15a (only one is shown) at positions corresponding to the respective coating layers 2 of the continuous paper 1. Each nozzle hole 15a has a discharge port 1
5b, the nozzle hole 15a and the discharge port 15b constitute the nozzle 15.

Each of the nozzle holes 15a communicates with one of five paint supply ports 16 (only one is shown) provided in the nozzle block 14 so as to correspond to each of the nozzle holes 15a. As shown in FIG. 2,
A varnish is supplied from the paint tank 17 by a pump 18. In addition, each nozzle 15 faces an idler roller 19 that guides the continuous paper 1. The varnish is discharged from the discharge port 15b of the nozzle 15 to the transferred continuous paper 1, and the varnish is applied to the coating layer 2 portion of the continuous paper 1. By these nozzle 15, pump 18, and idler roller 19,
It constitutes a paint application means.

Following this coating means, the upper and lower pairs of rollers 20a, 20b, 21a, 21b are moved in the direction of transport of the continuous paper 1 in order to bring the varnish applied to the coating layer 2 of the continuous paper 1 into close contact. They are arranged at intervals. These rollers 20a, 20b, 21a and 21b constitute a printing pressure applying means. The circumference of each of the rollers 20a and 20b is longer than the circumference of each of the rollers 21a and 21b.

The rollers 20a, 20b, 2
1a, 21b are rollers 20a, 20b, 21 of each pair.
The vertical spacing between a and 21b can be adjusted according to the paper thickness and the amount of varnish applied. Further, each roller 20a, 20b, 21
Preferably, a and 21b are formed of an elastic material such as rubber.

Next, the operation of applying varnish by the above-described coating apparatus 11 will be described. The continuous paper 1 on which the coating layer 2 is formed by a suitable coating material coating device (not shown) is transported by transport rollers 12 and 13 in the upper left direction in FIG. When the continuous paper 1 reaches the nozzle block 14, the varnish in the paint tank 17 is supplied by the pump 18,
The varnish is discharged from each discharge port 15b of the nozzle 15. As a result, a predetermined amount of varnish is continuously applied to each coating layer 2 portion of the continuous paper 1. The varnish discharge amount is
The operation of the pump 18 is controlled and set.

When the continuous paper 1 is further transported, the printing pressure is applied twice by two pairs of upper and lower rollers 20a, 20b, 21a and 21b, and the varnish surely adheres to the coated portion. At this time, since the pair of upper and lower rollers 20a and 20b and the pair of upper and lower rollers 21a and 21b have different circumferential lengths,
Even if the operation of the pump 18 becomes unstable and supply unevenness occurs, and even if there is more varnish than necessary in a certain portion of the peripheral surface of the pair of upper and lower rollers 20a and 20b in the previous stage, application unevenness occurs, Since the upper and lower pair of rollers 20a and 20b have different rotation cycles, stable application and fixing operations can be continued without being affected by application unevenness.

In this way, the varnish is continuously applied to each coating layer 2 portion of the continuous paper 1 so that the continuous paper 1
Is further transferred to a suitable winding device (not shown)
It is something that is wound up.

The present invention is not limited to the embodiment described above, and the configuration of the nozzle 15 is not limited to that provided in the nozzle block 14. Further, the rollers 20a, 20b, 21a, 21b constituting the printing pressure applying means are not limited to two pairs of rollers having different circumferential lengths, and may be composed of three or more pairs of rollers. Alternatively, it may be constituted by a plurality of pairs of upper and lower rollers having the same circumference, or may be constituted only by a pair of upper and lower rollers. Still further, it goes without saying that the transparent paint is not limited to the varnish.

[0019]

As described above, according to the paint coating apparatus of the first aspect of the present invention, the coating is performed by the nozzle and the printing pressure is applied by the roller to achieve the close contact. To reduce coating unevenness,
This has the effect of performing a stable application operation and improving the adhesion of the paint.

Further, according to the paint applying apparatus of the second aspect of the present invention, by providing a plurality of pairs of rollers as printing pressure applying means, the effect of the first aspect of the present invention can be achieved by reducing uneven coating and applying the coating. It is possible to further improve operation stability and adhesion in all aspects.

Further, according to the paint applying apparatus of the third aspect of the present invention, in addition to the effect of the first aspect, even if supply unevenness of the pump occurs, a plurality of pairs of rollers as a printing pressure applying means. Since the circumference of the roller is different, the rotation period of the preceding roller and that of the subsequent roller are different, and the subsequent roller is not affected by the application unevenness period of the preceding roller, and the occurrence of the application unevenness is eliminated. Thus, an effect that an extremely stable coating operation can be performed is achieved.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a paint application device.

FIG. 2 is a schematic explanatory diagram showing a supply system of a transparent paint.

FIG. 3 is a schematic plan view showing a part of continuous paper to be applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous paper 2 Coating layer 11 Paint application device 12, 13 Transfer roller 14 Nozzle block 15 Nozzle 17 Paint tank 18 Pump 20a, 20b, 21a, 21b Roller

Claims (3)

[Claims] 1. A paper transfer means for transferring continuous paper to which a transparent paint is applied, and a nozzle arranged corresponding to a transfer path of the continuous paper transferred by the paper transfer means, the transparent paint supplied from a pump being provided. A coating means for applying a coating pressure to the continuous paper surface with the nozzle, and a printing pressure applying means for applying a printing pressure with a roller to adhere the transparent coating material applied to the continuous paper surface following the coating means. A paint application device characterized by the above-mentioned. 2. The coating apparatus according to claim 1, wherein the printing pressure applying means comprises a plurality of upper and lower pairs of rollers arranged at intervals in a continuous paper transport direction. 3. The coating apparatus according to claim 2, wherein the plurality of pairs of rollers have different circumferential lengths.