JPH0199664A - Coating solution applicator in coating machine - Google Patents

Abstract

PURPOSE:To keep the clearance between a backup roll and a nozzle constant by operating a air cylinder, and pressing the nozzle toward the backup roll. CONSTITUTION:The applicator is composed of the coating soln. discharge nozzle 10 and the backup roll 3 arranged above and in parallel with the nozzle 10. Both ends of the nozzle 10 are supported by a rotary arm 30 to adjust the clearance between the nozzle 10 and the backup roll 3. An air cylinder holding member 50 is provided between both rotary arms 30, and the bend adjusting cylinder 40 is fixed tote holding member 50 so that the lower surface of the nozzle can be pressed by the piston rod 42. Namely, the air cylinder 40 is operated to press the nozzle 10 toward the roll 3 and to adjust the clearance between the roll 3 and the nozzle 10 at the position of the air cylinder to a desired value, and the clearance between the roll 3 and the nozzle 10 can be kept constant.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a coating liquid application device in a coating machine, and more specifically, a backup roller is disposed above a continuously running base material such as a film. At the same time, a nozzle for discharging the coating liquid is arranged below the base material parallel to the backup roller and with a predetermined gap, and the coating liquid pumped by the pump is delivered to the coating provided on the upper surface of the nozzle. The present invention relates to an apparatus for discharging a coating liquid from a coating liquid discharge port and applying the coating liquid to the surface of a substrate.

[Prior Art] Various types of coating liquid application devices for coating machines are known, but when the coating liquid is applied to a substrate, air gets mixed into the coating liquid. Since a smooth coating surface cannot be obtained, recently, an apparatus for applying a coating liquid using the above-mentioned method has been proposed.

As shown in FIG. 3, such a coating and liquid application device consists of a nozzle 10 for discharging the coating liquid and a backup roll 3 arranged in parallel above the nozzle 10.
Both ends of the roller 0 are supported by a rotating arm 3°, and by rotating this rotating arm 30, the gap between the backup roller 3 and the nozzle IO is adjusted, and the film thickness of the coating liquid is determined by the size of this gap. There is something that has been done.

[Problems to be Solved by the Invention] In such a coating liquid applicator, the gap between the backup roller 3 and the nozzle IO is usually set to about 20 to 200 μm, and this gap is required for coating the base material. Precision is required to keep the amount constant.

However, by rotating the rotating arm 30, the backup roller 3 and the nozzle 1 are moved at both ends of the nozzle 10.
0 is adjusted, but the nozzle 10 for discharging the coating liquid
is caused by its own weight and reaction force from the coating liquid it discharges, etc.
The center portion may sag downward and the gap may no longer be constant. For example, if the thickness of the base material is 30μ and the desired coating amount is 10μ, the gap between the backup roller 3 and the nozzle 10 needs to be 40μ;
If the center part of 0 is bent and the gap at the center becomes 45μ, the amount of coating becomes 15μ, which means that 50μ more will be applied.

In view of the above, an object of the present invention is to provide a coating liquid application device for a coating machine that can maintain a constant gap between a backup roller and a nozzle.

[Means for Solving the Problems] The coating liquid applicator in the coating machine according to the present invention consists of a nozzle for discharging the coating liquid and a backup roll arranged in parallel above the nozzle. is supported by a rotating arm to adjust the gap between the nozzle and the backup roll, and an air cylinder holding member is installed between both rotating arms, and the air cylinder holding member is An air cylinder for bend adjustment is attached so that its piston rod presses against the bottom surface of the nozzle.

[Function] In the coating liquid application device of the coating machine according to the present invention, by operating the rotating arm, at both ends of the nozzle,
Set the gap between the backup roller and the nozzle to the desired value, then operate the air cylinder for gap adjustment so that the rod presses the nozzle toward the backup roller, and adjust the gap at the air cylinder mounting position. Set the gap between the roller and nozzle to a desired value. Also,
Even during the application of the coating liquid, the coating amount of the base material is kept constant at n1, and if the coating amount is not constant in the width direction, the air cylinder is operated to adjust the gap between the two.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

Reference numerals 5 and 5 denote frames of the coating liquid application device 1 in the coating machine according to the present invention, which are provided oppositely on both sides of the device 1, and at the top thereof, back-up frames extending in the left and right width directions are provided. The roll 3 is attached to the roll support member 7
It is rotatably supported through.

A pair of rotating arms 30 are provided inside each frame 5.
．． 30 are arranged, and these rotating arms 30 are rotatably supported by the frame 5 via a rotating shaft (not shown) arranged below the frame 5.

Support shafts 32 are provided inwardly at the upper part of the rotary arm 30, and these support shafts 32 pass through holes in a vertically long rectangular side plate 34 arranged inside the rotary arm 30. .

By doing so, even if the rotary arm 30 rotates, the length direction of the side plate 34 is always in the vertical direction.

Below the backup roll 3, a nozzle 10 for discharging the coating liquid having approximately the same width as the roll 3 is arranged parallel to the roll 3. It has a long coating liquid reservoir 12.

A vibrator 18 for feeding the coating liquid B is attached to the front side of the central part of the coating liquid reservoir 12.
is pumped through this pipe 18 to the coating liquid reservoir 12 by a pump (not shown).

A coating liquid discharge port 14 extending in the width direction is provided on the upper surface of the nozzle 10.
This coating liquid discharge port 14 is connected to a coating liquid reservoir 12 via a coating liquid passageway 16 at its lower part.
The coating liquid B that has been pumped into the coating liquid reservoir 12 is applied to the substrate A from this coating liquid discharge port 14 . In this case, the nozzle 10 is held by the tip of the support shaft 32 at both ends thereof, and rotates in the same direction in conjunction with the rotation of the rotary arm 30. Therefore, by rotating the rotary arm 30, Coating liquid discharge port 14
The gap between the roller and the lower surface of the backup roll 3 can be adjusted.

An air cylinder holding member 50 in the shape of a rectangular tube is disposed below the nozzle 10 and parallel to the nozzle 10.

This holding member 50 is fixed to the inner surface of the side plate 34 via end plates 51 arranged at both ends thereof.
The air cylinder holding member 50 is installed between both rotating arms 30. Inside the center of the air cylinder holding member 50 in the width direction, a double rod type air cylinder 40 is disposed vertically.

This air cylinder 40 has its cylinder tube 46
The upper end is fixed to the air cylinder holding member 5°, and the upper end 43 of the piston rod 42 is screwed to the lower surface of the nozzle 10.

A scale holding member 7o is disposed inside and below the air cylinder holding member 50 in parallel with the holding member 50, and both ends of the scale holding member 7o pass through holes 52 formed in the end plate 51 of the air cylinder holding member 50. and is fixed to the inner surface of the side plate 34. Thereby, the scale holding member 70 is supported by the side plate 34 and by extension the rotating arm 3o separately from the air cylinder holding member 5o.

The scale holding member 70 has a notch 72 at its center.
Magnescale 6° (trade name), which is a magnetic displacement measurement scale, is arranged inside this notch 72, and Magnescale 6° is attached to this scale holding member via a support plate 74. It is fixed on the top surface of 7o. The top of the magnescale 6o is in contact with the lower surface of the lower end 44 of the piston rod 42 of the air cylinder 40, and vertical displacement of the piston rod 42 can be detected.

The operation of this embodiment will be explained below.

First, the rotating arm 30 is rotated to connect the coating liquid discharge port 14 and the backup roller 3 at both ends of the nozzle 10.
Set the gap between the
At the same time, the base material A is caused to run between the backup roller 3 and the nozzle IO. After doing this, the amount of displacement of the nozzle 10 is detected by the Magnescale 60, and the air cylinder 40 is operated so that the amount of displacement becomes 0, and the upper end 43 of the piston rod 42 is
The lower surface of the nozzle 10 is pressed toward the backup roller 3. In this way, the nozzle IO is made horizontal in the width direction and the gap between the backup roller 3 and the nozzle IO is maintained constant.

Also, operate the air cylinder 40 to bend the center part of the nozzle 10 upward in advance, and then apply the coating liquid B.
is discharged from the coating liquid discharge port 14, and the base material A is run between the backup roller 3 and the nozzle 10.

In this case, the center portion of the nozzle 1o is bent downward due to the reaction force of the coating liquid B, so that the nozzle 10 becomes horizontal.

Furthermore, the coating amount of the base material A is measured even during the coating of the coating liquid B, and if the coating amount is not constant in the width direction,
The air cylinder 40 is operated to adjust the gap between the backup roller 3 and the nozzle 10.

In the above embodiment, the air cylinder 40 is disposed at one location below the central portion of the nozzle 1o, but the present invention is not limited to this, and a plurality of air cylinders 40 may be disposed.

Furthermore, if the Magnescale 6o is arranged below the air cylinder 40 as in the above embodiment, the Magnescale 60
Although it is convenient because the amount of displacement of the air cylinder 40 can be detected by, the Magnescale 60 is omitted,
The coating amount of the base material B may be set as p1, and the air pressure of the air cylinder 40 may be adjusted based on this value.

[Effects of the Invention] In the coating liquid application device of the coating machine according to the present invention, by operating the air cylinder and pressing the nozzle toward the backup roller, the connection between the backup roller and the nozzle at the air cylinder mounting position is achieved. Since the gap can be adjusted to a desired value, the gap between the backup roller and the nozzle can be maintained constant.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a coating liquid application device in a coating machine that is an embodiment of the present invention, and FIG.
Fig. 3 is an enlarged cross-sectional view taken along the line (2), with the internal mechanisms of the air cylinder and Magnescale omitted; Fig. 3 is a front view of a coating liquid application device in a conventional coating machine; Explanation of symbols A...Base material B...Coating liquid 1...Coating liquid application device 3 in the coating machine...
... Backup roll 10 ... Nozzle 30 ... Rotating arm 40 ... Air cylinder 42 ... Piston rod 50 ... Air cylinder holding 2 other members;・
-Uni!・1j

Claims (1)

[Claims] 1. It consists of a nozzle for discharging the coating liquid and a backup roll arranged in parallel above the nozzle, and both ends of the nozzle are supported by rotating arms so that the gap between the nozzle and the backup roll can be adjusted. In the coating liquid application device of the coating machine, an air cylinder holding member is installed between both rotating arms, and the air cylinder for bend adjustment is mounted on this air cylinder holding member, and its piston rod presses the bottom surface of the nozzle. A coating liquid application device for a coating machine, characterized in that it is installed as follows.