JPH0631224A - Gravure coating apparatus and gravure printing press - Google Patents

Abstract

PURPOSE:To efficiently perform the cleaning work of a gravure plate cylinder during the coating work or printing work to a raw fabric. CONSTITUTION:A high pressure jet device 30 injecting a coating solution or ink toward a gravure plate cylinder 11 is provided on the lateral side of the gravure plate cylinder 11 so as to be prositioned on the downstream side of the contact part with a raw fabric 15. The coating solution in a coating solution pan or the ink in an ink pan is sent to the high pressure jet device 30 and injected toward the gravure plate cylinder 11 from the high pressure jet device 30 to discharge the residual solution in a cell.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravure coating apparatus and a gravure printing machine.

[0002]

2. Description of the Related Art Conventionally, a gravure plate cylinder having cells formed on its surface and an impression cylinder for pressing the original fabric between the gravure plate cylinder as a coating device for applying a coating liquid to the original fabric. A gravure coating device having and is known. A coating liquid pan and a supply roll for supplying the coating liquid to the gravure plate cylinder are provided below the plate cylinder.

In such a gravure coating apparatus, the coating liquid in the coating liquid pan is supplied to the gravure plate cylinder by the supply roll during the coating operation. Then, the excess coating liquid is scraped off by a doctor, and the coating liquid supplied into the cells of the gravure plate cylinder is applied to the original fabric pressed between the coating liquid and the impression cylinder.

In such a coating apparatus, the solid content produced by the chemical reaction of the pigment, the curing agent, etc. in the coating liquid often adheres to the inside of the cell, and the coating amount of the coating liquid on the raw fabric is large. It may change or the coated surface may not be uniform. Therefore, the coating work is stopped after a certain period of operation, and the surface of the gravure plate cylinder is brushed to remove the residual liquid and solid matter in the cell.

In the case of a gravure printing machine having a gravure plate cylinder and an impression cylinder, the above-mentioned phenomenon may occur, and like the case of the gravure coating apparatus, a printing operation is performed similarly for a long time. Then, the surface of the gravure plate cylinder was brushed to remove the residual liquid and solids in the cell.

[0006]

As described above, in the gravure coating device or the gravure printing machine, when the residual liquid or solid matter is accumulated in the cells due to the coating work for a long time or the printing work, the coating is performed. I stopped working or printing and brushed the surface of the gravure cylinder. However, this brushing work is a manual work, and since the coating work or the printing work is stopped,
ineffective.

The present invention has been made in view of the above points, and provides a gravure coating apparatus and a gravure printing machine capable of producing a high-quality coating material or a printed material and efficiently operating for a long time. It is intended to be provided.

[0008]

The present invention is directed to a gravure plate cylinder having cells formed on the surface thereof, an impression cylinder for pressing a coating material between the gravure plate cylinder, and the gravure plate cylinder. A coating apparatus that includes a coating liquid pan disposed below and a supply roll that contacts the coating liquid in the coating liquid pan and supplies the coating liquid to the gravure plate cylinder, and coats the coating liquid on a raw material. In, in the side of the gravure plate cylinder, on the downstream side of the contact portion with the original fabric, a high-pressure spraying device for spraying the coating liquid toward the gravure plate cylinder and discharging the residual liquid in the cell is provided, A gravure coating device characterized in that the high-pressure jetting device and the coating liquid pan are connected to each other, and a gravure plate cylinder having cells formed on the surface thereof, and a printing master plate between the gravure plate cylinder and the gravure plate cylinder. An impression cylinder that presses against the gravure plate cylinder. In a gravure printing machine that is provided with an ink pan and a supply roll that comes into contact with the ink in the ink pan and supplies the ink to the gravure plate cylinder, a gravure printing machine that performs gravure printing on an original fabric is provided on the side of the gravure plate cylinder. A high-pressure jet device that jets ink toward the gravure plate cylinder and discharges the residual liquid in the cell is provided on the downstream side of the contact portion with the counter, and the high-pressure jet device and the ink pan are connected. A gravure printing machine characterized by.

[0009]

According to the present invention, the coating liquid in the coating liquid pan or the ink in the ink pan is jetted onto the surface of the gravure plate cylinder by the high-pressure jetting device located on the downstream side due to the contact portion with the original fabric. This makes it possible to prevent the solid content from adhering to the inside of the cells of the gravure plate cylinder, and to discharge the adhered solid content and the like.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing an embodiment of the present invention.

1 and 2, the gravure coating apparatus 10 includes a gravure plate cylinder 11 having cells 11a formed on the surface and a gravure plate cylinder 11 arranged above the gravure plate cylinder 11. An impression cylinder 12 for pressing a resin coating material 15 is provided. Further, an expander roll 13 for adjusting the tension of the raw fabric 15 is arranged on the upstream side of the impression cylinder 12, and an angle adjusting roll 14 for adjusting the angle of the raw fabric 15 is arranged on the downstream side of the impression cylinder 12. ing.

Below the gravure plate cylinder 11, a coating liquid pan 16 containing a coating liquid 25 is arranged. Further, in the coating liquid pan 16, there is provided a supply roll 19 which is partially immersed in the coating liquid 25 and supplies the coating liquid 25 to the gravure plate cylinder 11.

Further, as shown in FIG. 1, the gravure plate cylinder 1
A doctor 17 for scraping off an excessive portion of the coating liquid supplied onto the surface of the gravure plate cylinder 11 is provided on the upper side of 1 and upstream of the contact portion with the original 15.

The tank 2 is provided below the coating liquid pan 16.
0 is connected, and a pipe 26 is connected to the tank 20 via a circulation pump 21. The tip 26 a of the pipe 26 opens above the coating liquid 25 in the coating liquid pan 16. Also. The side of the gravure plate cylinder 11 and the original 15
A high-pressure injection device 30 for injecting the coating liquid toward the gravure plate cylinder 11 is disposed on the downstream side of a contact portion with the high-pressure injection device 30. The high-pressure injection device 30 is connected to the tank 20 via a high-pressure pump 22 by a pipe 69. Has been done. This high-pressure injection device 30
Has the same length as the gravure plate cylinder 11, and discharges the residual liquid remaining in the cells 11a of the gravure plate cylinder 11 by injecting the coating liquid at a high pressure over the entire length in the width direction of the gravure plate cylinder 11. is there.

A cleaning brush 28 is arranged above the high-pressure jetting device 30 so as to be freely contactable to and detachable from the gravure plate cylinder 11. Further, a drum 27 for replenishing the coating liquid is connected to the tank 20.

Next, the operation of this embodiment having such a configuration will be described.

First, the raw fabric 15 is the expander roll 13,
It is conveyed through the cylinder 12 and the angle adjusting roll 14 in order. During this time, the coating liquid is supplied to the surface of the gravure plate cylinder 11 by the supply roll 19 which is partially immersed in the coating liquid 25 in the coating liquid pan 16. Excessive amount of the coating liquid supplied to the surface of the gravure plate cylinder 11 is scraped off by the doctor 17, and the scraped coating liquid is guided by the straightening plate 18 and returned to the coating liquid pan 16. On the other hand, the coating liquid remaining on the surface of the gravure plate cylinder 11 enters the cells 11a of the gravure plate cylinder 11 by the doctor 17 and is applied to the surface of the raw material 15 pressed between the gravure plate cylinder 11 and the impression cylinder 12. Is applied.

During such a coating operation, the coating liquid in the tank 20 is sent to the head 51 of the high-pressure jet device 30 by the high-pressure pump 22. Then, this coating liquid is jetted from the head 51 toward the gravure plate cylinder 11, and the residual liquid remaining in the cells 11 a of the gravure plate cylinder 11 is discharged.
In addition, the cleaning brush 28 may be attached to the gravure plate cylinder 11 if necessary.
The liquid remaining in the cell 11a may be removed by bringing the liquid into contact with.

The original fabric 15 having the surface coated with the coating liquid 25 is then sent to a heating and drying device (not shown), and the original fabric 15 is heated and dried to produce the original fabric 1.
A coating film is formed on the surface of 5.

As described above, according to this embodiment,
Since the coating liquid 25 is applied to the original fabric 15 by the gravure plate cylinder 11 having the cells 11a formed on its surface, the coating liquid that has entered the cells 11a can be applied to the surface of the original fabric 11 in a thick film state with high accuracy. it can. Further, while the coating liquid is applied to the surface of the raw fabric 11 (during the coating operation), the high-pressure jetting device 30
Since the residual liquid remaining in the cells 11a of the gravure plate cylinder 11 is discharged by the above, the gravure plate cylinder 11 can be efficiently cleaned without being stopped.

Although the high-pressure jetting device 30 is provided on the side of the gravure plate cylinder 11 of the gravure coating device in the above embodiment, the invention is not limited to this, and the side of the gravure plate cylinder of the gravure printing machine is not limited to this. A high-pressure injection device may be provided in the. In this case, a printing stock is printed by the gravure plate cylinder instead of the coating stock, and ink is used instead of the coating liquid.

[0022]

As described above, according to the present invention,
The high-pressure jetting device located on the downstream side of the contact area with the original fabric allows the residual liquid remaining in the cells of the gravure plate cylinder to be discharged, so that the gravure plate can be used during coating or printing on the original fabric. The body can be cleaned efficiently.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a gravure coating apparatus according to the present invention.

FIG. 2 is a perspective view showing a gravure plate cylinder.

[Explanation of symbols]

 10 Gravure coating device 11 Gravure plate cylinder 11a Cell 12 Impression cylinder 15 Raw material 16 Coating liquid pan 19 Supply roll 20 Tank 22 High pressure pump 30 High pressure injection device

Claims (2)

[Claims] 1. A gravure plate cylinder having cells formed on its surface,
An impression cylinder that presses the coating stock between the gravure plate cylinder, a coating liquid pan disposed below the gravure plate cylinder, and a coating liquid in contact with the coating liquid in the coating liquid pan. In the coating apparatus, which comprises a supply roll for supplying the gravure plate cylinder with a coating liquid, the gravure plate is lateral to the gravure plate cylinder and is downstream of the contact portion with the original plate. A gravure coating apparatus comprising: a high-pressure spraying device for spraying the coating liquid toward the barrel and discharging the residual liquid in the cells, and connecting the high-pressure spraying device and the coating liquid pan. 2. A gravure plate cylinder having cells formed on its surface,
An impression cylinder that presses the printing stock between the gravure plate cylinder, an ink pan arranged below the gravure plate cylinder, and ink in the ink pan to contact and supply the ink to the gravure plate cylinder. In a gravure printing machine, which is equipped with a supply roll for performing gravure printing on an original fabric, is a side of the gravure plate cylinder and is downstream of a contact portion with the original fabric, and ejects ink toward the gravure plate cylinder. A gravure printing machine, characterized in that a high-pressure jetting device for discharging the residual liquid in the cell is also provided, and the high-pressure jetting device and the ink pan are connected.