JP3659815B2 - Paint applicator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paint coating apparatus that applies a transparent paint such as silicon or varnish to continuous paper, and more particularly, to a paint coating apparatus that applies a transparent paint by a nozzle.
[0002]
[Prior art]
Conventionally, in order to apply a transparent paint such as silicon or varnish to continuous paper, the transparent paint is usually supplied to the application roller through a plurality of rollers as in a printing machine, and the continuous paper surface is applied by the application roller. Transparent paint is applied. For adjustment when the application amount is large or small, the amount of ink supplied from the ink fountain is adjusted to maintain a fixed amount.
[0003]
[Problems to be solved by the invention]
As in conventional printers, paint application devices that use multiple rollers, including application rollers, are affected by environmental conditions such as the rotational speed, temperature, and humidity of each roller. There is a disadvantage that the control of the supply amount, that is, the control of the coating amount of the transparent paint is complicated and difficult.
[0004]
On the other hand, in a paint coating apparatus using a nozzle, since the paint is directly supplied to the nozzle, the control of the coating amount is relatively easy, and there is no problem when the coating amount is large. When applied to a coating apparatus that applies a transparent paint, there are disadvantages in that coating unevenness occurs and inferior to a printing press in terms of adhesion. For example, when a transparent paint is applied to protect the magnetic stripe, there is a possibility that reading accuracy may be adversely affected if there is a difficulty in application unevenness or adhesion.
[0005]
The present invention eliminates such inconveniences, makes it easy to control the amount of coating using a nozzle, realizes a stable coating operation by eliminating coating unevenness, and improves the adhesion of transparent coatings. An object is to provide an apparatus.
[0006]
[Means for Solving the Problems]
In order to achieve this object, a coating material application apparatus according to claim 1 of the present invention includes a sheet transfer means for transferring a continuous sheet on which a transparent paint is applied, and a transfer path for continuous sheets transferred by the sheet transfer means. Nozzle is arranged corresponding to the above, and the coating material applying means for applying the transparent coating material supplied from the pump to the continuous paper surface by the nozzle, and the transparent coating material applied to the continuous paper surface following this coating material application means Ri Na includes a printing pressure applying means for applying a printing pressure at roller, the printing pressure applying means, when a plurality of pairs spaced apart pair of upper and lower rollers in the continuous paper transport direction both rollers of the pairs Are characterized by different perimeters .
[0007]
In order to achieve the above object, the paint application apparatus according to claim 2 of the present invention is such that the plurality of pairs of rollers according to claim 1 has the peripheral length of the upstream roller being the peripheral length of the downstream roller. It is characterized by being longer .
[0008]
Further, in order to achieve the above object, in the paint coating apparatus according to claim 3 of the present invention, the plurality of pairs of rollers according to claim 2 are formed of a material having elasticity such as rubber. It is characterized by.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a schematic side view showing a paint coating apparatus, FIG. 2 is a schematic explanatory view showing a supply system of a transparent paint, and FIG. 3 is a schematic showing a part of continuous paper to be applied. It is a top view.
[0010]
First, a continuous paper on which a transparent paint such as varnish is applied will be described with reference to FIG. The continuous paper 1 is provided with a coating layer 2 formed by coating a coated material in a strip shape in parallel at equal intervals on one side. These coating layers 2 extend in the longitudinal direction of the continuous paper 1, and in order to protect these coating layers 2, varnish is applied in a band shape so as to cover the portions of the respective coating layers 2.
[0011]
Next, the paint application device will be described. As shown in FIG. 1, the coating material application apparatus 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 transfer path of the continuous paper 1 transferred by these transfer rollers 12 and 13. The nozzle block 14 is provided with five nozzle holes 15a (only one is shown) at positions corresponding to the coating layers 2 of the continuous paper 1 respectively. Each nozzle hole 15a is provided with a discharge port 15b, and the nozzle 15 is constituted by the nozzle hole 15a and the discharge port 15b.
[0012]
Each of these nozzle holes 15a communicates with one of the five paint supply ports 16 (only one is shown) provided in the nozzle block 14 so as to correspond to each nozzle 15 via each paint supply port 16. As shown in FIG. 2, varnish is supplied from a paint tank 17 by a pump 18. Each nozzle 15 is opposed to an idle roller 19 that guides the continuous paper 1. Varnish is discharged from the discharge port 15 b of the nozzle 15 to the transported continuous paper 1, and the varnish is applied to the coating layer 2 portion of the continuous paper 1. The nozzle 15, the pump 18, and the idle roller 19 constitute a paint application unit.
[0013]
Following this paint application means, two pairs of upper and lower rollers 20a, 20b, 21a, 21b are spaced apart in the transport direction of the continuous paper 1 in order to bring the applied varnish onto the coating layer 2 portion of the continuous paper 1. It is arranged. These rollers 20a, 20b, 21a and 21b constitute a printing pressure applying means. The circumferential lengths of the rollers 20a and 20b are formed longer than the circumferential lengths of the rollers 21a and 21b.
[0014]
The rollers 20a, 20b, 21a, and 21b can adjust the vertical distance between each pair of rollers 20a, 20b, 21a, and 21b according to the paper thickness and the amount of varnish applied. Each roller 20a, 20b, 21a, 21b is preferably formed of a material having elasticity such as rubber.
[0015]
Subsequently, a varnish application operation by the above-described coating material application apparatus 11 will be described. The continuous paper 1 on which the coating layer 2 is formed by an appropriate coating material coating apparatus (not shown) is transferred leftward in FIG. 1 by the transfer rollers 12 and 13. When the continuous paper 1 reaches the nozzle block 14, the varnish in the paint tank 17 is supplied by the pump 18, and the varnish is discharged from each discharge port 15 b of the nozzle 15. Thus, a predetermined amount of varnish is continuously applied to each coating layer 2 portion of the continuous paper 1. The discharge amount of the varnish is set by controlling the operation of the pump 18.
[0016]
When the continuous paper 1 is further transferred, printing pressure is applied twice by the two pairs of upper and lower rollers 20a, 20b, 21a, and 21b, and the varnish reliably adheres to the application portion. At this time, the pair of upper and lower rollers 20a, 20b and the pair of upper and lower rollers 21a, 21b have different circumferential lengths, so that the operation of the pump 18 becomes unstable and uneven supply occurs, and the pair of upper and lower rollers 20a, 20b in the previous stage Even if there is an unnecessarily large amount of varnish for a certain portion of the peripheral surface and uneven coating occurs, the pair of upper and lower rollers 20a and 20b in the subsequent stage have different rotation cycles, so that they are not affected by uneven coating. Thus, stable application and fixing operations can be continued.
[0017]
In this way, the varnish is continuously applied to each coating layer 2 portion of the continuous paper 1, and the continuous paper 1 that is in close contact with the varnish is further transported and taken up by an appropriate winding device (not shown). It will be.
[0018]
In addition, this invention is not limited to embodiment mentioned above, The structure of the nozzle 15 is not restricted to what is provided in the nozzle block 14. FIG. Further, the rollers 20a, 20b, 21a, and 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 composed of a plurality of pairs of upper and lower rollers having the same peripheral length, or may be composed of only a pair of upper and lower rollers. Of course, the transparent paint is not limited to varnish.
[0019]
【The invention's effect】
Thus, according to the paint coating apparatus of the first aspect of the present invention, the application is performed by the nozzle , and a plurality of pairs of upper and lower pairs of rollers are provided as the printing pressure application means at intervals in the paper transport direction. The printing pressure is applied multiple times to achieve close contact, facilitating control of the coating amount, reducing coating unevenness, performing stable coating operation, improving paint adhesion , and supplying pumps Even if unevenness occurs, the circumferential lengths of a plurality of pairs of rollers serving as printing pressure application means are different, so the rotation cycle of the front roller and the rear roller are different, and the coating unevenness cycle of the front roller is different. There is an effect that an extremely stable coating operation can be performed without the influence of the influence of the roller of the subsequent stage and the occurrence of uneven coating .
[0020]
Further, according to the paint coating apparatus of the invention of claim 2 of the present application, the plurality of pairs of rollers have the peripheral length of the upstream roller longer than the peripheral length of the downstream roller. the effects of the reduction of uneven coating, stability of the coating operation, an effect that can be further improved in all respects improvement in adhesion, of.
[0021]
Further, according to the paint coating apparatus of the invention of claim 3 of the present application, since the plurality of pairs of rollers are formed of a material having elasticity such as rubber, the effect of the invention of claim 2 can be applied. There is an effect that it can be further improved in all of the points of unevenness reduction, stability of coating operation, and improvement of adhesion .
[Brief description of the drawings]
FIG. 1 is a schematic side view of a paint coating apparatus.
FIG. 2 is a schematic explanatory diagram showing a transparent paint supply system.
FIG. 3 is a schematic plan view showing a part of continuous paper to be coated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Continuous paper 2 Coating layer 11 Paint coating apparatus 12, 13 Transfer roller 14 Nozzle block 15 Nozzle 17 Paint tank 18 Pump 20a, 20b, 21a, 21b Roller

Claims (3)

A paper transfer means for transferring continuous paper to which the transparent paint is applied, and a nozzle corresponding to a transfer path of the continuous paper transferred by the paper transfer means, and the transparent paint supplied from the pump is supplied to the continuous paper by the nozzle. a paint application means for applying to the surface, Ri Na comprises a printing pressure applying means for applying a printing pressure by a roller in order to adhere the transparent paint applied to the paper for continuous Following this paint application means, the printing pressure applied The means includes a plurality of pairs of upper and lower rollers arranged at intervals in the continuous paper transport direction, and the plurality of pairs of rollers have different circumferential lengths . The paint application apparatus according to claim 1 , wherein the plurality of pairs of rollers have a peripheral length of the upstream roller longer than a peripheral length of the downstream roller . 3. The paint application apparatus according to claim 2 , wherein the plurality of pairs of rollers are formed of a material having elasticity such as rubber .

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