JP6986736B2 - Coating method and coating equipment - Google Patents

Description

The present invention relates to a coating method and a coating apparatus, and particularly relates to a coating method and a coating apparatus suitable for simultaneously coating both sides of a substrate to be conveyed.

As a device for applying a coating material to both sides of a thin base material, it is necessary to guide the base material to change the transport direction and apply the coating material to different surfaces before and after the change of the transport direction. Has been proposed (see Patent Document 1).

Japanese Patent No. 5834048

In order to apply the coating material on both sides of a thin substrate with high accuracy, it is important to apply the coated substrate so that it does not flutter or generate minute vibrations. ..

Conventionally, it has been requested to eliminate it.

The present invention has been made in view of these points, and it is possible to apply a coating material with high accuracy without vibrating the conveyed base material, and it is possible to apply a high-quality coating. It is an object of the present invention to provide a construction method and a coating apparatus.

In order to achieve the above-mentioned object, the coating method of the first aspect of the present invention is a single number in the width direction of the thin film-like long base material conveyed in the longitudinal direction with respect to both sides of the base material. Alternatively, in a coating method in which the coating agent is simultaneously applied in the longitudinal direction of the substrate in a plurality of coating regions, a substrate using a gravure roll having a diameter of 10 to 50 mm is used on both sides of the substrate. In addition to applying the coating agent with the opposite surface as a free body, the thickness direction of the base material with respect to the base material in each of the gravure rolls arranged apart from each other in the longitudinal direction of the base material. The coating is applied while controlling the transport state of the base material by adjusting the pressing force acting on the base material, and the thickness of the base material is applied to both sides of the base material on the downstream side of the gravure roll on the downstream side in the transport direction. The base material is sandwiched from both sides by two guide rollers installed facing each other in the vertical direction, and the base material is floated and supported by a gas flowing out from the outer peripheral surface of the guide roller. It is characterized by.

Further, in the coating method of the second aspect of the present invention, in the first aspect, a precursor layer is formed in each coating region of the base material, and the coating agent is a precursor layer. It is characterized by being coated so as to cover.

In the coating apparatus of the first aspect of the present invention, the coating agent is applied in the longitudinal direction of the substrate in a single or a plurality of coating regions in the width direction on both sides of a long substrate conveyed in the longitudinal direction. In a coating device that performs work at the same time, the opposite surfaces of the base material are freely arranged using gravure rolls having a diameter of 10 to 50 mm, which are arranged apart from each other in the longitudinal direction of the base material on both sides of the base material. The coating means for applying the coating agent to the body and the pressing force acting on the base material in the thickness direction of the base material in each gravure roll are adjusted to control the transport state of the base material. The pressing force adjusting means and the gas flowing out from the outer peripheral surface to the outside at a position facing both sides of the base material downstream from the gravure roll on the downstream side in the transport direction in the thickness direction of the base material. It is characterized by having two guide rollers installed so as to sandwich the base material from both sides so that the material is floated from both sides and transported while being supported.

Further, in the coating apparatus of the second aspect of the present invention, in the first aspect, a precursor layer is formed in each coating region of the base material, and the coating agent is a precursor layer. It is characterized by being coated so as to cover.

When subjected to coating to a substrate according to the first coating process by the first coating unit, nipping the though base material was pressed in the thickness direction a substrate being conveyed by two gravure roll It is possible to apply the coating material while transporting it as it is, and the base material with the coating material coated on both sides is arranged so as to sandwich the base material at the position downstream from the microgravure roll. Since it can be transported while being supported by floating from both sides by the two guide rollers, it is possible to apply the coating material accurately without vibrating the transferred base material, and high quality coating is possible. Work can be done.

Further, when the base material is coated by the fifth coating apparatus according to the second coating method, the coating material can be applied on the precursor previously formed on the base material.

According to the coating method and coating apparatus according to the present invention, it is possible to apply the coating material with high accuracy without vibrating the conveyed base material, and it is possible to apply high quality coating. It has excellent effects such as being able to provide a construction method and a coating device.

Front view showing one embodiment of the present invention Explanatory drawing showing the relationship between the gravure roll, the base material, and the coating material when coating a plurality of coating areas divided in the width direction of the base material. (A) to (d) are front views showing other examples of guide rollers capable of outflowing gas.

Hereinafter, the coating apparatus of the present invention will be described with reference to the embodiments shown in FIGS. 1 to 3.

In FIG. 1, the configuration including the drying furnace 1 is shown in a skeleton manner.

FIG. 1 shows the overall configuration of the coating apparatus 1 of the present embodiment. The thin, long base material 2 taken out from the original fabric (not shown) is conveyed in the direction of the arrow by being wound by a winding roll (not shown). The base material 2 is separated in the longitudinal direction (transportation direction) from both sides of the base material 2 which is vertically conveyed by the two guide rollers 6 and 7 arranged above and below the plurality of guide rollers 3 to 7 in the middle. The coating material is formed so as to be coated by the upstream coating unit 10 and the downstream coating unit 20 arranged at the above-mentioned positions. In each of the coating units 10 and 20, the coating materials 12 and 22 which are formed in the same manner and are stored in the coating material containers 11 and 21 are wound up by the gravure rolls 13 and 23 having a diameter of 10 to 50 mm. The coating materials 12 and 22 weighed in a predetermined amount by the doctor blades 14 and 24 are formed so as to be coated on both surfaces of the base material 2 to which the coating materials 12 and 22 are conveyed to a predetermined thickness. The opposite side of the base material 2 of each of the gravure rolls 13 and 23 is in a free state. As shown in FIG. 2, each of the gravure rolls 13 and 23 is engraved with gravure when the two precursors 2a and 2b are pre-coated on both sides of the substrate 2 with the two precursors 2a and 2b separated in the width direction. It is preferable to form the gravure engraving portions 13a and 23a separated in the axial direction so that the coating materials 12 and 22 can be applied by separating them in the width direction of 2 of the base material. Each of the coating units 10 and 20 is formed so that the pressing force in the thickness direction of the gravure rolls 13 and 23 with respect to the base material 2 can be adjusted by, for example, electromagnetic actuators 15 and 25 as pressing pressure adjusting means. The guide roller 7 arranged on the downstream side of the downstream side coating unit 20 also acts as a roller for changing the transport direction of the base material 2, and has a gas (for example, air, inertness) from the outer peripheral surface to the outside. It is formed so that the base material 2 can be floated by the gas flowing out from the outer peripheral surface and the transport direction can be changed while supporting the base material 2). The guide roller 7 is formed by forming a porous body or a punching metal into a cylindrical shape, and gas is supplied from a gas supply means (not shown) to just float the base material 2 and coat it before drying. The material 22 is formed so as to allow gas to flow out with a pressure that does not scatter.

Next, the operation of the present embodiment having the above-described configuration will be described.

Before the start of operation, the coating units 10 and 20 are moved by the electromagnetic actuators 15 and 25 so as to press the base material 2 in the thickness direction to adjust the pressing force. Specifically, in FIG. 1, the gravure rolls 13 and 23 of both coating units 10 and 20 are pushed in the thickness direction of the base material 2 to convey the base material 2 in a loose zigzag shape.

While transporting the base material 2 at a predetermined speed, the coating material 12 is applied to one side of the base material 2 (the right side in FIG. 1) to a predetermined thickness by the gravure roll 13 of the upstream unit 10. Subsequently, the coating material 12 is coated on one side of the base material 2 (the right side in FIG. 1) to a predetermined thickness by the gravure roll 23 of the upstream unit 20. At that time, the base material 2 conveyed by the two gravure rolls 13 and 23 is pressed in the opposite directions in the thickness direction, and the coating materials 12 and 22 are applied while being conveyed as if the base material 2 is niped. Since it can be applied, the coating materials 12 and 22 can be applied accurately without vibrating the conveyed base material 2, and high-quality coating can be applied.

Further, as shown in FIG. 2, even if two precursors 2a and 2b are formed with respect to the base material 2 in the width direction, the precursors between the adjacent precursors 2a and 2b are formed by the pressing force. The coating materials 12 and 22 can be applied accurately without the bodies 2a and 2b entraining air in the inner portion. In FIG. 2, the thicknesses of the base material 2, the precursors 2a and 2b, and the coating materials 12 and 22 are exaggerated.

Then, in the portion of the guide roller 7, the surface on which the coating material 22 before drying is coated can be floated by the guide roller 7 and supported by the gas flowing out from the outer circumference, and the transport direction can be changed. At the same time, the base material 2 conveyed by the guide roller 7 and the two gravure rolls 13 and 23 can be conveyed without vibrating, and the coating material can be applied accurately, resulting in high-quality coating. Can be applied.

The present invention is not limited to the above-described embodiment, and various modifications can be made as needed.

For example, in the above embodiment, the two coating units 10 and 20 are arranged in a portion where the base material 2 is vertically conveyed, but are arranged in a portion where the base material 2 is conveyed horizontally or a portion where the base material 2 is conveyed diagonally. You may.

The guide roller 7 for discharging gas may be formed by one roller as in the above embodiment, or may be conveyed by a guide roller for discharging a plurality of gases as shown in FIGS. 3 (a) to 3 (d). Changing the route The route may be changed according to the purpose. In FIG. 3D, the vibration of the base material 2 can be further suppressed by sandwiching the base material 2 from both sides by the guide rollers 7 that allow gas to flow out. In this case, both guide rollers 7 and 7 may be arranged so as to face each other.

1 Coating equipment 2 Base material 2a Precursor 3 to 7 Guide roller 10 Upstream coating unit 12, 22 Coating material 13, 23 Gravure roll 15, 25 Electromagnetic actuator

Claims (4)

The coating agent is applied in the longitudinal direction of the base material in a single or multiple coating regions in the width direction of the base material on both sides of the thin film-like long base material conveyed in the longitudinal direction. In the coating method applied at the same time
On each of both sides of the base material, a gravure roll having a diameter of 10 to 50 mm is used to make the opposite side of the base material a free body, and the coating agent is applied, and the base material is separated in the longitudinal direction. In each of the gravure rolls arranged in the gravure roll, the pressing force acting on the base material in the thickness direction of the base material is adjusted to control the transport state of the base material, and coating is performed .
The base material is sandwiched from both sides by two guide rollers installed on both sides of the base material so as to face each other in the thickness direction of the base material on the downstream side of the gravure roll on the downstream side in the transport direction. A coating method characterized in that the base material is floated by a gas flowing out from the outer peripheral surface of a guide roller and conveyed while being supported. The coating method according to claim 1, wherein a precursor layer is formed in each coating region of the base material, and the coating agent is coated so as to cover each precursor layer. .. In a coating device that simultaneously applies a coating agent in the longitudinal direction of the substrate in a single or multiple coating areas in the width direction on both sides of a long substrate conveyed in the longitudinal direction.
The coating agent is applied to both sides of the base material so as to be spaced apart from each other in the longitudinal direction of the base material, and the opposite side of the base material is made free using a gravure roll having a diameter of 10 to 50 mm. The coating method to be constructed and
In each of the gravure rolls, a pressing force adjusting means for controlling the conveying state of the base material by adjusting the pressing force acting on the base material in the thickness direction of the base material ,
At a position facing both sides of the base material downstream of the gravure roll on the downstream side in the transport direction in the thickness direction of the base material, the base material is levitated from both sides by a gas flowing out from the outer peripheral surface. A coating device comprising two guide rollers installed so as to sandwich the base material from both sides so as to be conveyed while bearing. The coating apparatus according to claim 3, wherein a precursor layer is formed in each coating region of the base material, and the coating agent is coated so as to cover each precursor layer. ..

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