JPH05200342A - Coater - Google Patents

Abstract

PURPOSE:To provide a coater applicable to both the cases where a coating material is irradiated with a radiation with a coating surface in noncontact with a roll to harden it and where a coating material is irradiated with a radiation from the rear of a substrate with a coating surface in contact with a roll to harden it. CONSTITUTION:A coating material 10 with which a coating surface 16 of a substrate 6 draw out of a roll 4 is coated is hardened by a radiation and the heat generated by hardening is absorbed by a roll 12. Rollers 15 are arranged between the roll 4 and the roll 12 to guide the substrate to the roll 12. Rollers 19 are arranged between the roll 12 and a roll 5 to guide the substrate to the roll 5. The roll 12 is rotatable in both forward and backward directions. The rollers 15 guide the substrate coming into contact with the rear of the substrate, the reverse side of the coating surface, at least between a coater and the roll 12. The rollers 19 consists of those for guiding the substrate to the roll 5 in forward rotation of the roll 12 and those for guiding the substrate to the roll 5 in backward rotation of the roll 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating machine used for manufacturing decorative sheets, magnetic tapes, various functional films, etc. used for surfaces of furniture, articles, interior materials for buildings, etc.
In particular, the present invention relates to a coating machine that uses an ionizing radiation curable resin that is cured by ionizing radiation such as ultraviolet rays and electron beams as a coating agent.

[0002]

2. Description of the Related Art Conventionally, in a coating machine, as shown in FIG. 3, a coating surface 51 of a web-shaped base material 50 is coated with an ionizing radiation curable resin coating material, and the coating surface 51 is in a non-contact state. There is known a method in which ionizing radiation is applied to an ionizing radiation curable resin coating material to cure it. Reference numerals 52 and 53 are guide rollers for the web-shaped substrate 50. When the web-shaped substrate 1 is a material that is thermally deformed by the irradiation of ionizing radiation, the cooling roll 54 is web-shaped as shown in FIG. 4 in order to absorb the heat generated by the irradiation of ionizing radiation. While the back surface of the base material 50 opposite to the coating surface 51 is in contact, the ionizing radiation is applied to the ionizing radiation curable resin coating material to cure it. Further, as shown in FIG. 5, the web-shaped base material 50 is wound so that the coating surface 51 contacts the cooling roll 54, and the ionizing radiation is irradiated from the back surface of the web-shaped base material 50 to cure the ionizing radiation-curable resin. It is also known to cure the paint. In addition,
In FIG. 5, 55 is a contact roller.

[0003]

However, the coating surface 51 of the web-shaped substrate 50 is coated with the ionizing radiation curable resin coating material, and the back surface opposite to the coating surface 51 is the cooling roll 5.
4, the web-shaped base material 50 is wound so as to be in contact with the coating material 4 and the ionizing radiation is applied to the ionizing radiation curable resin coating material to cure the coating material. The web-shaped base material 5 so that the 51 contacts.
A coating machine that winds 0 and irradiates ionizing radiation from the back surface of the web-shaped substrate 50 to cure the ionizing radiation-curable resin coating has a dedicated structure.

Therefore, the coating surface 51 of the web-shaped substrate 50 is coated with the ionizing radiation-curable resin coating material, and the back surface on the opposite side of the coating surface 51 is brought into contact with the cooling roll 54 to form the web-shaped substrate 50. When it is required to wind and irradiate the ionizing radiation to the ionizing radiation-curable resin coating to cure it, the web-shaped substrate 50 is wound so that the coating surface 51 contacts the cooling roll 54, In the case where it is required to irradiate the ionizing radiation from the back surface of the web-shaped substrate 50 to cure the ionizing radiation-curable resin coating, there is a disadvantage that a coating machine dedicated to it must be prepared.

The present invention has been made in view of the above circumstances. An object of the present invention is to wind a web-shaped base material on a cooling roll so that the back surface on the side opposite to the coated surface is in contact with the cooling roll. When irradiating ionizing radiation to an ionizing radiation-curable resin coating to cure it, the web-shaped substrate is wound so that the coating surface contacts the cooling roll, and the ionizing radiation is applied from the back surface of the web-shaped substrate. An object of the present invention is to provide a coating machine that can be applied to both cases of irradiating and curing an ionizing radiation curable resin coating.

[0006]

In order to achieve the above object, a coating machine according to the present invention has an unwinding roll around which a web-shaped substrate is wound, and the above-mentioned web drawn out from the unwinding roll. A coating device for applying an ionizing radiation-curable resin coating material to the coated surface of the substrate, and an ionizing radiation irradiation device for curing the ionizing radiation-curable resin coating material applied to the web-shaped substrate, A cooling roll for facing the ionizing radiation irradiation device, winding the web-shaped substrate, and absorbing heat generated by curing of the ionizing radiation-curable resin coating material applied to the wound portion, A winding roll for winding the web-shaped substrate, and an upstream guide roller that is arranged between the unwinding roll and the cooling roll to guide the web-shaped substrate toward the cooling roll, A downstream guide roller that is arranged between the cooling roll and the winding roll and guides the web-shaped substrate toward the winding roll, and the cooling roll is capable of rotating in the forward and reverse directions. The upstream guide roller guides the web-shaped substrate while contacting the back surface on the opposite side to the coating surface between at least the coating device and the cooling roll, and the downstream guide roller of the cooling roll. It is composed of a forward rotation roller that guides the web-shaped substrate toward the winding roll during normal rotation, and a reverse rotation roller that guides the web-shaped substrate toward the winding roll during reverse rotation of the cooling roll. It is characterized by

[0007]

According to the present invention, the web-shaped substrate is wound on the cooling roll with one coating machine so that the back surface on the side opposite to the coating surface is in contact with the cooling roll, and the ionizing radiation is cured by the ionizing radiation curable resin. When the coating material is irradiated to cure it, and when the web-shaped base material is wound so that the coating surface contacts the cooling roll, the ionizing radiation is irradiated from the back surface of the web-shaped base material to cure the ionizing radiation. It is possible to perform both the work of curing the resin.

[0008]

Embodiments of the coating machine according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a frame of a coating machine. The frame 1 is provided with brackets 2 and 3. A winding roll 4 is rotatably provided on the bracket 2, and a winding roll 5 is rotatably provided on the bracket 3. The unwinding roll 4 has a web-shaped substrate 6
Is wound. Although the unwinding roll 4 is a uniaxial type in this embodiment, it may be a biaxial turret type in consideration of productivity. A coating device 7 is provided below the frame 1. As the coating device 7, a gravure coater, a gravure offset coater, a roll coater, a reverse coater, a knife coater, or the like is used. The coating device 7 is a gravure coater here, and is roughly composed of a container 8 and a coating roller 9. A solution of the ionizing radiation curable coating material 10 is stored in the container 8. An ionizing radiation irradiation device 11 and a cooling roll 12 are provided above the coating device 7. The cooling roll 12 is rotatably provided on a bracket 13, and the cooling roll 12 is surrounded by a shielding container 14 that shields ionizing radiation. An upstream guide roller 15 is provided between the unwinding roll 4 and the cooling roll 12. The web-shaped substrate 6 is drawn out from the unwinding roll 4 so that the coated surface 16 faces downward, and is guided to the coating device 7. Then, the coating surface 16 of the web-shaped substrate 6 is coated with the ionizing radiation curable coating material 10.

The web-shaped substrate 6 is raised after the coating surface 16 is coated with the ionizing radiation curable resin coating material 10 and guided toward the cooling roll 12. Coating device 7
The upstream guide rollers 15 provided between the cooling roller 12 and the cooling roller 12 are arranged in a bow shape. When the ionizing radiation curable resin coating material 10 is dissolved in a solvent having high volatility, it is desirable to provide a hot air drying device at the rising portion of the web-shaped substrate 6. Contact rollers 17 and 18 are provided on both sides of the cooling roll 12 in the rotation direction.
Is provided. The web-shaped substrate 6 is guided while the back surface on the side opposite to the coating surface 16 coated with the ionizing radiation curable resin coating material 10 is in contact with the upstream guide rollers 15 and 15B.

The web-shaped substrate 6 coated with the ionizing radiation-curable resin coating material 10 is conveyed toward the downstream guide roller 19 while being in contact with the cooling roll 12. The downstream guide roller 19 guides the web-shaped substrate 6 toward the take-up roll 5 when the cooling roll 12 is normally rotated, and the web-shaped substrate 6 is taken up when the cooling roll 12 is rotated in reverse. It is composed of a reverse guide roller 19B for guiding toward.

As shown in FIG. 1, the web-shaped substrate 6 has a coating surface 16 on the cooling roll 12 when the cooling roll 12 is normally rotated.
Is conveyed so that the coated surface 16 faces the ionizing irradiation line device 11. Then, the web-shaped substrate 6 is pressed against the outer peripheral surface of the cooling roll 12 by the contact roller 17 and peeled off by the contact roller 18. In addition, the web-shaped substrate 6 is
As shown in FIG. 2, the back surface on the side opposite to the coating surface 16 is in contact with the cooling roll 12 and the coating surface 16 is the ionizing irradiation device 11.
It is transported so as to face. And contact roller 1
It is peeled off by 7.

As the ionizing radiation irradiation device 11, for example, an electron beam irradiation device or an ultraviolet irradiation device is used. The electron beam irradiation device has, for example, a width of 1300 mm and an acceleration voltage of 2
50KV, current value 150mA, irradiation capacity 300Mrad
/ M · min, the ultraviolet irradiation device has a width of 1400 mm, a high pressure mercury lamp (metal halide lamp 5K
W x 3 lights) is used.

When the material of the web-shaped substrate 6 is an opaque substance such as paper, it must be an electron beam irradiation device, but the material of the web-shaped substrate 6 is a transparent film and an ionizing radiation curable resin coating. When 10 is also transparent, an inexpensive ultraviolet irradiation device can be used.

The web-shaped substrate 6 is irradiated with ionizing radiation when passing through the cooling roll 12, and the ionizing radiation-curable resin coating material 10 is cured by the ionizing radiation.

As shown in FIG. 1, when the coating surface 16 is brought into contact with the chill roll 12 and conveyed, the chill roll 12 is used.
Since the surface condition of the outer peripheral surface of the cooling roll 12 is transferred to the coating surface 16, when the surface of the cooling roll 12 has a mirror finish, the coating surface 16
A product having a mirror surface state is obtained, and when the outer peripheral surface of the cooling roll 12 is a shaping roll having a satin or embossed pattern, a product having a surface state corresponding to the coated surface 16 is obtained. On the other hand, for example, when irregular irregularities are formed on the coating surface 16 by using a special ink, the back surface of the coating surface 16 is brought into contact with the cooling roll 12 and conveyed, as shown in FIG. In this case, it is general to use a mirror surface roll as the cooling roll 12.

In this embodiment, various known devices such as the unwinding tension adjusting device, the meandering preventing device, the splicing device and the accumulator are not shown because they are not directly related to the invention.

Further, in this embodiment, the unwinding roll 4 is provided at a position spaced apart from the coating device 7, but may be installed adjacent to the coating device 7, or It may be installed above the working device.

[0019]

The coating machine according to the present invention irradiates the ionizing radiation onto the ionizing radiation-curable resin coating material by winding the web-like base material so that the cooling roll comes into contact with the back surface opposite to the coating surface. To cure it, and to wind the web-shaped substrate so that the coating surface contacts the cooling roll and irradiate ionizing radiation from the back side of the web-shaped substrate to cure the ionizing radiation-curable resin coating. It can be applied to both.

[Brief description of drawings]

FIG. 1 is a diagram showing a conveyance state of a web-shaped substrate when a cooling roll of a coating machine according to the present invention is normally rotated.

FIG. 2 is a diagram showing a conveyance state of a web-shaped substrate when the cooling roll of the coating machine according to the present invention is reversed.

FIG. 3 is a partial view showing a state in which an ionizing radiation curable resin coating material applied to a web-shaped substrate is cured by an ionizing radiation irradiation device without using a cooling roll of a conventional coating machine.

[Fig. 4] Irradiation of ionizing radiation-curable resin coating material applied to a web-shaped substrate with the back surface of the web-shaped substrate opposite to the coated surface being in contact with the cooling roll of a conventional coating machine It is a partial view showing the state where it is made to harden with a device.

FIG. 5 shows a state in which an ionizing radiation-curable resin coating material applied to a web-shaped base material is cured by an ionizing radiation irradiation device in a state where the coating surface of the web-shaped base material is in contact with a cooling roll of a conventional coating machine. FIG.

[Explanation of symbols]

 4 Unwinding roll 5 Winding roll 6 Web-shaped substrate 7 Coating device 11 Ionizing radiation irradiation device 12 Cooling roll 14 Shielding container 15 Upstream guide roller 16 Coating surface 19 Downstream guide roller 19A Forward rotation guide roller 19B Reverse rotation guide roller

Claims (4)

[Claims] 1. An unwinding roll around which a web-shaped base material is wound, and a coating device for applying an ionizing radiation curable resin coating material to the coating surface of the web-shaped base material drawn out from the unwinding roll. An ionizing radiation irradiation device for curing the ionizing radiation curable resin coating material applied to the web-shaped substrate, and the web-shaped substrate wound around the ionizing radiation irradiation device and facing the ionizing radiation irradiation device and A cooling roll for absorbing heat generated by the curing of the ionizing radiation curable resin coating applied to the winding portion, a winding roll for winding the web-shaped substrate, and the unwinding roll from the unwinding roll. An upstream guide roller that is arranged between cooling rolls and guides the web-shaped substrate toward the cooling roll, and a web that is arranged between the cooling roll and the winding roll. A downstream guide roller that guides the base material toward the winding roll, the cooling roll is capable of forward and reverse rotation, and the upstream guide roller is at least between the coating device and the cooling roll. Guides the web-shaped base material while contacting the back surface on the side opposite to the coating surface, and the downstream guide roller guides the web-shaped base material toward the take-up roll during forward rotation of the cooling roll. And a reverse rotation roller that guides the web-shaped substrate toward the take-up roll when the cooling roll reversely rotates. 2. The coating machine according to claim 1, wherein the ionizing radiation irradiation device is an electron beam irradiation device, and the cooling roll is stored in a shielding container that shields X-rays. 3. The coating machine according to claim 1, wherein the ionizing radiation irradiation device is an ultraviolet irradiation device, and the cooling roll is housed in a shielding container that shields ultraviolet rays. 4. The coating machine according to claim 1, wherein the cooling roll is a shaping roll having an embossed outer peripheral surface.