JP3252278B2 - Double-side coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided coating apparatus for forming a resin coating film on both sides of a web from left and right resin sump dams defined by a downwardly running web and having substantially equal internal pressures. , Foil, punching plate,
It is used when a coating film is formed on both sides of a net-like sheet material or the like.

[0002]

2. Description of the Related Art As this type of double-side coating apparatus, for example, the one shown in FIGS. 1 and 2 is known.
In the apparatus shown in FIG. 1, rubber rolls 3, 3 rotating in the same direction as the web 1 are arranged in parallel from both sides of the web 1 so as to press them, and the web 1 passed through a resin reservoir 4 provided at the upper part.
Resins 2 and 2 are adhered to both surfaces of the
This is a coating apparatus that forms an applied film by squeezing out excess resin liquid by guiding it between the three. The thickness of the coating film is designed by the pressing force of the rubber rollers 3 and 3. However, in the case of the rubber roller, it is difficult to finish the surface of the coating to a mirror surface.
If the pressure of the roller is strong, fine streaks due to the roughness of the accuracy are likely to be generated on the surface of the resin film, and if the pressure is weak, the web 1 sways between the rollers and the film thickness is increased. Is unstable.

The apparatus shown in FIG. 2 is a coating apparatus in which cleaning doctors 6 are arranged on both sides of the web 1 instead of the rubber roller 3. However, it is very difficult to finish the doctor's edge with uniform accuracy over the entire length, and it is difficult to secure a uniform coating on the left and right because thin edges must be installed face-to-face. Becomes Fine irregularities may be generated due to the shaking of the web 1, and depending on the shape of the tip of the doctor 6, the resin liquid may adhere to the back side of the doctor and damage the coating film, which may cause the formation of streaks. is there.

[0004]

The present invention relates to a double-side coating apparatus for forming a resin coating film on both surfaces of a web from left and right resin dams which are defined by a downwardly running web and have substantially equal internal pressures, without causing the web to fluctuate. An object of the present invention is to make it possible to form a coating film on a substrate.

[0005]

[Technical Means] Technical means for solving this technical problem include (a) a web guiding slit having a web guiding slit.
Position adjustment in the right angle direction and placed inside the resin dam
A guide member that, (b) a stepped portion formed in the longitudinal direction at the bottom sides of the resin dam are opposed consists was a pipe doctor blade arrangement, a slit and a doctor gap of (c) the guide member in the vertical direction closely arranged, Guy the thickness of (d) a resin film fed to both sides of the web which has passed through the slit
It is determined by the de member and a doctor, Ru der. The second technical means is a pie in the above technical means.
Positioning of the doctor in the vertical and horizontal directions is possible.
That is, it was arranged in a function .

[0006] The web passing through the resin dam is opposed to the web .
The vehicle travels in the dam guided by the slit of the guide member arranged so as to be capable of adjusting the position in the right angle direction . Pipe-type doctors are arranged on both sides of the lower part of the resin dam, and the steps formed in the longitudinal direction on the doctor are opposed to each other,
The web will pass through the gap in this step. The guide member is arranged with its slit close to the doctor gap.
To have been allowed to location, c the moment the E blanking has passed through the slit of the guide member, a resin solution having an equal pressure almost to the web through the gap between the guide member and a doctor are supplied into a film from the right and left, Immediately after, the opposing doctor's stage
To adjust the film thickness by passing between the
A coating film can be formed without causing fluctuation . What
In the second technical means, it is arranged below the guide member.
Place the placed pipe-type doctor vertically and horizontally.
The structure that can be moved to the
The thickness can be adjusted .

[0007]

According to the present invention , the coating film can be formed without causing fluctuation in the web.
Formation can result, a coating film formed on the surface of the window E blanking there is an advantage of stably. Further, there is an advantage that a glossy coating film can be formed at the same time, and a mirror-finish coating with a film thickness on one side of 10 to 500 μm (but immediately after coating) is also possible.

[0008]

FIG. 1 shows a fixed pipe type doctor 13 between resin dams 14 and 14 which are disposed to face left and right.
It is a front schematic diagram of the double-sided coating device in which 13 was arranged. A step 16 is provided on the rear side of the resin dam 14, and a resin reservoir 17 is provided between the resin dam 14 and the opening of the resin supply slit 15. The step 16 and the resin supply slit 15 are formed to have a width suitable for the width of the web 1. When a supply device (not shown) is operated according to a detection signal of the liquid level gauge 21, the resin liquid 2 supplied from the resin supply slit 15 is formed. Once this resin reservoir 17
After that, it is supplied in layers to the dam 14 over the step portion 16. By configuring the resin dam 14 in this manner, the internal pressure of the resin in the dam 14 can be made uniform, and the occurrence of turbulence in the dam can be suppressed.

The doctor 13 is disposed below the bottom surface on the tip side of the dam 14 and is in close contact with the bottom wall of the dam 14. The doctors 13 are arranged in parallel with a slight gap therebetween, and a step 1 formed on the surface of each doctor 13 is formed.
The web 1 runs downward while the webs 2 and 12 are opposed to each other. The upper opening of the dam 14 is closed by a lid 22 and a side wall 23 to prevent a change in viscosity due to evaporation of a solvent or the like of the resin liquid 2 and to prevent dust and dirt from entering the dam 14. To prevent impurities from entering the coating.

A web guide 25 for guiding the traveling of the web 1 in the dam 14 is disposed above the opposing portions of the resin dams 14, that is, above the gap between the doctors 13. Runs in a slit 26 formed in the center in the vertical direction. The slit 26 is slightly narrower at the lower end portion than at the upper end portion, and the leading end thereof is brought closer between the doctors 13. The web guide 25 is provided with a screw rod 2 penetrating the left and right side walls 23, 23.
The slit width is adjusted by rotating the screw rod 27 by engaging with the tips of 7, 7 so that the running of the web 1 of different thickness is enabled. The thickness of the coating film can be adjusted by moving the dam and the doctor 13 integrated therewith in the vertical and horizontal directions.

FIG. 4 is a schematic front view of a coating apparatus showing an example of a dam moving apparatus. In this apparatus example, a bent portion of an L-shaped arm 31 is fixed to the doctor 13, a base end 32 of the arm 31 is pivotally supported on a base frame 30 of the coating apparatus, and a tip end is provided with a taper cotter 34 via a roll 33. On top. A spring 36 is hung between the arm 31 and the lower part of the base frame 30, and the roll 33 is urged downward, that is, toward the taper cotter 34 side. The taper cotter 34 is engaged with a screw rod 35 attached to a support fixed to the base frame 30,
By rotating the screw bar 35, the taper cotter 34 advances and retreats (in the drawing, left and right direction). Taper cotter 3
As the roll 4 moves forward, the roll 33 moves slightly upward, so that the doctors 13 and 13 swing about the base end 32 of the arm as a fulcrum to reduce the doctor interval and at the same time reduce the distance to the web guide 25. Become. Conversely, when the taper cotter 34 is retracted, the roll 33 moves slightly downward, the distance between the doctors 13 and 13 increases, and the distance from the web guide 25 increases.

In the apparatus shown in FIG. 4, the doctor 13 is
Although the position is adjusted by the operation of 5, the position of the doctor support may be adjusted by using separate driving devices in the vertical and horizontal directions.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a conventional double-side coating apparatus.

FIG. 2 is a schematic view of another conventional double-side coating apparatus.

FIG. 3 is a schematic sectional view of a double-side coating apparatus according to the present invention.

FIG. 4 is a schematic cross-sectional view of a double-sided coating device equipped with a doctor position adjusting device.

[Explanation of symbols]

1 web, 2 resin, 13 pipe doctor, 14
Resin dam, 21 liquid level gauge, 25 web guide, 26
slit,

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B05C 3/12-3/18 B05C 9/04 B05C 11 / 02,11 / 04 B05D 7/04

Claims (2)

(57) [Claims] 1. A double side coating device to form a resin coating film approximately equal the left and right resin dam on both sides of the web to internal pressure is bounded by a running web downward, web guiding
With slits for adjusting the position in the direction perpendicular to the web
It consists of a guide member arranged inside the resin dam by making it possible, and a pipe type doctor arranged with a step formed in the longitudinal direction on both sides of the lower part of the resin dam and facing each other. closely arranged, the double side coating device which is adapted to determine the thickness of the resin film fed to both sides of the web which has passed through the slit by the guide member and a doctor. 2. The pipe-type doctor is moved vertically and horizontally.
2. The vehicle according to claim 1, wherein the position adjustment is possible.
Surface coating equipment.