JP2591432Y2 - Coating equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus for applying paint to a web such as paper.

[0002]

2. Description of the Related Art As shown in FIG . 2 , a coating apparatus (coater) is used.
Is a web 3 of paper or the like guided by guide rolls 1 and 2
And a paint supply unit (applicator) 5 provided in the vicinity of the backup roll 4. The paint is pressure-fed from a pump (not shown) connected to the applicator 5. Running paper 3
After the spraying, the blades 6 provided on the downstream side of the running level the blades. Below these, a color pan 7 for receiving the scraped paint is provided.

[0003]

In recent years, the speed of coating has been increased and the feed speed of the paper 3 has been increased. As a result, the air a carried along with the paper 3 becomes a non-negligible disturbance, which enters between the applicator 5 and the paper 3 and even if the paint is uniformly discharged from the spout of the applicator 5, it does not actually occur. There is a problem that the application becomes uniform, and the stripes are formed or scattered without being applied.

[0004] In view of the above circumstances, the present invention has been devised in order to provide a coating apparatus which does not have an adverse effect of air carried along with running paper.

[0005]

According to the present invention, there is provided a coating apparatus for applying a paint to a surface of a web wound around a roll and traveling by a paint supply unit provided near the roll. the nozzles of the coating material supply unit for spraying the coating material to the web surface is inclined so as to direct the traveling direction of the web are arranged, the blade for scraping off surplus coating material applied to the web is provided downstream thereof Te, the
A pair of rows is located upstream of the paint supply section
Endless sheet and the endless sheet
In order to circulate the sheet at approximately the same speed as the web,
Composed of a roller and a driving means for driving the other roller to rotate.
A removing means is provided, and the one roller is separated from the web.
The other roller is located at the nozzle of the paint supply section.
The roller is formed small enough to approach
The endless sheet wound around the outer periphery of the
Placed in close proximity and lightly touching the web surface
It is what was assumed .

[0006]

With the above construction, the air removing means excludes the air carried by the web and prevents the air from flowing between the paint supply section and the web.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of a coating apparatus according to the present invention. The coating apparatus includes a backup roll 4 for running the paper 3 as a web, an applicator 5 provided near the backup roll 4 and spraying a paint on the surface of the running paper 3 as in the related art. The air removing means 61 which is a feature of the present invention is provided upstream of the applicator 5 in the paper traveling direction A.

The backup roll 4 winds the paper 3 over a predetermined circumferential section, and transports the paper 3 at high speed in cooperation with a guide roll (not shown). The applicator 5 has a liquid reservoir 12 formed therein, a tip portion 15 having a passage 13 communicating therewith formed in a nozzle shape, and is appropriately inclined with respect to the surface of the winding section of the backup roll 4. It is opened in the direction to be. A pump 18 for pumping the paint 17 through a pipe 16 is connected to the liquid reservoir 12.

The air removing means 61 includes a set of rollers 62,
63 and the rollers 62 and 63 are stretched and circulated.
Endless sheet 64. This endless sheet 64
Running paper in the winding section of the backup roll 4
3 is positioned to lightly contact the surface. Another one
The endless sheet 64 is a backup roller for the roller 63.
Drive motor 65 so that it circulates at approximately the same speed as
Are linked.

In addition, a blade 6 for scraping off excess paint 17 is provided at a position at a predetermined distance downstream from the applicator 5.

Next, the operation of this embodiment will be described.

When the paint 17 is applied to the paper 3, the backup roll 4 is rotated to transport the paper 3 at a high speed, and at the same time, the paint 17 is pressure-fed by the pump 18 to discharge the paint 17 from the applicator 5 in a jet form. . At this time, air “a” flows toward the applicator 5 along with the traveling on the front side of the paper 3, but is blocked by the endless sheet 64.
And obliquely downward along the surface as indicated by the arrow in the figure.
It is led to. In other words, invade the application 5 side
Is prevented. The endless sheet 64 is the same as the paper 3
Circulating in the direction and speed,
Even if touched, the effect can be minimized,
It does not interfere with applications. Of the paint 17 sprayed on the paper 3 by the applicator 5, excess paint is scraped off by the blade 6.

As described above, before the applicator 5 ,
A pair of rollers 62, 63, and between these rollers 62, 63
Air removal consisting of the endless sheet 64 that is stretched and circulated
The means 61 is provided to eliminate the air a carried by the paper 3, so that the air a can be prevented from adversely affecting the application by the applicator 5. Is secured.

[0015]

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

The effect of air on paint application can be eliminated and a uniform and normal application in high speed coating is achieved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a coating apparatus according to the present invention.

FIG. 2 is a side view showing a conventional coating apparatus.

[Explanation of symbols]

3 paper (web) 4 backup roll (roll) 5 applicator (paint supply section) 61 air removing means 17 paint a air

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B05C 5/00-5/04 B05C 1/00-3/20

Claims (1)

(57) [Scope of request for utility model registration] 1. A coating apparatus for applying a paint to a surface of a web wound around a roll and running by a paint supply unit provided in the vicinity of the roll, wherein the paint is applied to the web surface relative to the roll. The nozzle of the paint supply unit to be sprayed was inclined and arranged so as to face the traveling direction of the web, and a blade for scraping off excess paint applied to the web was provided downstream of the nozzle, and the blade was arranged with the inclination.
On the upstream side of the paint supply section, between a pair of rollers and these rollers
Endless sheet and the endless sheet
One of the rollers is rotated to circulate at approximately the same speed as
Air removing means comprising a driving means for
One roller is spaced apart from the web and the other roller is
Make sure the roller is close to the paint supply nozzle.
Formed small and wound around the roller
The endless sheet is sufficiently close to the paint supply section and the web
A coating device, wherein the coating device is arranged so as to lightly contact the surface .