WO2018025292A1

WO2018025292A1 - Automatic washing device for anilox roll and washing method thereof

Info

Publication number: WO2018025292A1
Application number: PCT/JP2016/003588
Authority: WO
Inventors: 正幸杉浦; 聰池上
Original assignee: ナカンテクノ株式会社
Priority date: 2016-08-03
Filing date: 2016-08-03
Publication date: 2018-02-08
Also published as: JP6086339B1; WO2018025292A8; TWI653152B; JPWO2018025292A1; KR20180116113A; CN108136768A; TW201815594A; CN108136768B

Abstract

Provided is an automatic washing device which enables thorough washing of an anilox roll that has been used in a printing job. A printing plate 3 is installed on a plate cylinder 2. The plate cylinder 2 transfers printing liquid via the printing plate 3 onto a substrate 15 placed on a printing platen 14. An anilox roll 1 rotates in synchronization with the plate cylinder 2 so as to apply the printing liquid to the printing plate 3. A coating part 4 forms a liquid trap 5 by coming into slide-contact with the anilox roll 1 during printing and during washing out of the printing liquid using a washing liquid, applies a coat of the printing liquid, washes out the printing liquid after printing, and then is separated from the anilox roll 1. A liquid supply part 6 supplies the printing liquid to the liquid trap 5 during printing, and supplies the washing liquid to the liquid trap 5 during the washing after the printing. Following the washing of the anilox roll 1, a pure water supply part 8 supplies purified water to the surface of the rotating anilox roll 1 so as to rinse away the washing liquid. A casing 7a which serves as a drying part 7 is disposed adjacent to the anilox roll 1, and has a high-pressure air ejection port 7b and a suction port 7k that are provided in a surface opposite to the anilox roll 1.

Description

Anilox roll automatic cleaning device and cleaning method

The present invention automatically cleans the surface of an anilox roll after printing in flexographic printing in which an alignment film is printed with high positional accuracy on a fine circuit pattern formed on a substrate, which is a substrate, using a printing plate. The present invention relates to an automatic cleaning apparatus and a cleaning method thereof.

For alignment film printing on a fine circuit pattern on a substrate, a printing liquid (for example, polyimide liquid) is applied to an anilox roll in a uniform and predetermined thickness, and the printing cylinder rotates while contacting the anilox roll. The plate cylinder is rotated and moved on the substrate placed on the surface plate of the printing apparatus, and the printing liquid transferred to the printing plate is matched with the fine circuit pattern of the substrate. Alignment film printing is executed by transferring the film onto the top.

When printing is completed, it is necessary to clean and remove the printing liquid from the anilox roll, but the cleaning liquid (for example, the cleaning liquid (for example, , N-methyl-2-pyrrolidone solution) and rotating the anilox roll to wash, so that the printing liquid on the surface as well as the printing liquid in the micro holes formed on the surface of the anilox roll are washed away. .
When the cleaning liquid is an N-methyl-2-pyrrolidone liquid, it is a volatile organic solvent, but has a boiling point of 204 ° C., and the residue remains on the anilox roll (particularly, infinitely formed microholes on the surface). For this reason, at present, the operator manually wipes the cleaning liquid using a wiper containing alcohol while rotating the anilox roll.

Anilox rolls have innumerable minute holes on the surface as described above, and even though they are hard chrome plated or ceramic, they are very fragile, so they are very sensitive to wiping work. Attention is required. Further, the work needs to be performed while rotating the anilox roll as described above, and there is a possibility that the operator may be caught in the anilox roll, which is very dangerous.

Therefore, an apparatus as described in Patent Document 1 has been proposed as an anilox roll automatic cleaning apparatus. However, this automatic cleaning device is for automatic cleaning during printing, not for automatic cleaning after printing.
This conventional apparatus includes a cleaning liquid injection nozzle that injects a cleaning liquid that is a volatile organic solvent on the anilox roll surface, a blower unit that injects a pressurized gas to the anilox roll after the cleaning liquid is supplied, and An anilox roll cleaning device comprising a cleaning liquid recovery unit that receives the cleaning liquid supplied to the surface of the anilox roll is provided.

In the automatic cleaning of the anilox roll, first, in the cleaning area, the anilox roll to which the printing liquid adheres is rotated, the cleaning liquid is sprayed from the cleaning liquid spray nozzle toward the surface, and the printing liquid is washed off. Along with the cleaning liquid or after the cleaning liquid is jetted, pressurized gas is jetted onto the anilox roll by a gas jet nozzle. The cleaning liquid in the surface of the anilox roll and the minute holes (cells) is blown off by this pressurized gas, and the cleaning operation is completed.
The washed-off printing liquid is sprayed, and then the blown-off cleaning liquid is recovered by the cleaning liquid recovery unit. These cleaning liquid jet nozzle, gas jet nozzle and cleaning liquid recovery unit are housed in a case provided close to the anilox roll so that the printing liquid and cleaning liquid are not scattered as much as possible.

Japanese Patent No. 5482382

However, even if a case is provided, if cleaning liquid or compressed air is spouted toward the anilox roll inside the case, the inside of the case will be at a higher pressure than the outside of the case, and the cleaning liquid spouts from between the anilox roll and the case. In addition, it is inevitable that the surroundings will be soiled and the organic solvent from the printing liquid and cleaning liquid will also leak to the surroundings and deteriorate the working environment. Furthermore, the cleaning liquid mixed with the printing liquid blown off from the anilox roll may fly in the case and re-adhere to the anilox roll. May remain in the microholes of the anilox roll, and the cleaning liquid residue may be mixed with the printing liquid when printing the next lot.

The present invention has been made in view of such problems, and the purpose of the present invention is to reliably clean the anilox roll after the completion of the printing operation, and the cleaning liquid does not leak to the outside, and the surroundings and the surface are cleaned. It is an object of the present invention to provide an anilox roll automatic cleaning device and an automatic cleaning method for the anilox roll which do not contaminate the anilox roll.

In order to solve the above-mentioned problem, the automatic cleaning apparatus for anilox roll according to claim 1,
A printing plate 3 is installed, and a printing cylinder 2 for transferring a printing liquid applied to the printing plate 3 through the printing plate 3 to a substrate 15 installed on a surface plate 14;
An anilox roll 1 that rotates in synchronization with the plate cylinder 2 and applies the printing liquid to the printing plate 3;
When the printing liquid is applied to the anilox roll 1 at the time of printing, and the printing liquid applied by the cleaning liquid is washed after the printing is finished, the liquid pool 5 is formed between the anilox roll 1 and the anilox roll 1 by sliding contact with the anilox roll 1. After washing, a coating part 4 that is separated from the anilox roll 1;
A liquid supply unit 6 for supplying printing liquid to the liquid reservoir 5 during printing and supplying the cleaning liquid to the liquid reservoir 5 when cleaning the anilox roll 1 after printing;
After cleaning the anilox roll 1 with the cleaning liquid, pure water is supplied to the surface of the rotating anilox roll 1 and the cleaning liquid is washed off;
A high-pressure air jet 7b that is disposed in the vicinity of the anilox roll 1 and is provided on the opposite surface facing the anilox roll 1, and is provided adjacent to the jet 7b, and is blown off by the high-pressure air and the high-pressure air. And a drying unit 7 having a casing 7a provided with a suction port 7k for sucking the purified water.

Claim 2 (FIG. 2 (a)) is the automatic cleaning device for anilox roll 1 according to claim 1,
A gas-liquid separator 12;
A decompression pipe 11 connecting the decompression space 7m of the casing 7a in which the suction port 7k is formed and the inlet 12a of the gas-liquid separator 12;
A pressurizing pipe 10 connecting the pressurizing space 7c of the casing 7a provided with the spout 7b and the outlet 12b of the gas-liquid separator 12,
A compressor 17 installed in the pressurizing pipe 10 and supplying high-pressure air to the pressurizing space 7c is further provided.

Claim 3 is another example (FIG. 2 (b)) of the exhaust treatment that does not use the gas-liquid separator 12.
In the automatic washing apparatus of the anilox roll 1 according to claim 1,
A decompression pipe 11 connecting the decompression space 7m of the casing 7a in which the suction port 7k is formed and the factory exhaust pipe;
An exhaust blower 19 installed in the decompression pipe 11 or the factory exhaust pipe;
The pressurized space 7c of the casing 7a provided with the jet nozzle 7b is connected to the factory high-pressure piping, or the compressor 17 is installed, and the pressurized piping 10 for supplying high-pressure air to the pressurized space 7c is further provided. It is characterized by that.

Claim 4 is the automatic cleaning apparatus for anilox roll 1 according to any one of claims 1 to 3,
A high-frequency vibration generator 13 that applies high-frequency vibration to the high-pressure jet air is further provided at the jet outlet 7b of the casing 7a.

Claim 5 is an automatic cleaning method using the automatic cleaning device for anilox roll 1 according to claim 1,
The printing liquid in the liquid reservoir 5 provided between the anilox roll 1 and the coating part 4 provided at the position facing the anilox roll 1 is applied to the printing plate 3 installed in the plate cylinder 2;
Printing is performed by rolling the plate cylinder 2 over the substrate 15 to bring the printing plate 3 into contact with the substrate 15;
After the printing on the substrate 15 is completed, the anilox roll 1 is rotated while supplying the cleaning liquid to the liquid reservoir 5 to wash the printing liquid on the anilox roll 1.
After the printing liquid is cleaned with the cleaning liquid, the coating unit 4 is detached from the anilox roll 1, and then pure water is supplied to the anilox roll 1 to wash off the cleaning liquid on the anilox roll 1.
After removing the cleaning liquid with pure water, the casing 7a of the drying unit 7 is brought close to the anilox roll 1, and high-pressure air is jetted from the jet port 7b of the casing 7a to blow off the attached pure water on the anilox roll 1, and the jet port 7b. The high-pressure air and the blown-off pure water are sucked by a suction port 7k provided adjacent to the suction port.

Claim 6 is an automatic cleaning method using the automatic cleaning apparatus for anilox roll 1 according to claim 2,
The air containing the cleaning liquid or pure water is sucked from the decompression space 7m of the casing 7a, and the air and the cleaning liquid or pure water are separated by the gas-liquid separation device 12,
The separated air is supplied to the pressurized space 7c of the casing 7a as high-pressure air by the compressor 17.

Claim 7 is an automatic cleaning method using the automatic cleaning apparatus for anilox roll 1 according to claim 3.
Air containing cleaning liquid or pure water is sucked from the reduced pressure space 7m of the casing 7a, and the sucked air is sent to the factory exhaust pipe by the blower 19,
The compressor 17 supplies the outside air as high-pressure air to the pressurized space 7c of the casing 7a.

Claim 8 is an automatic cleaning method using the automatic cleaning apparatus for anilox roll 1 according to claim 4.
A high-frequency vibration is imparted to the high-pressure jet air by a high-frequency vibration generator 13 provided at the jet outlet 7b of the casing 7a.

In the present invention, the printing liquid of the anilox roll 1 is washed with a washing liquid (polar solvent), then the washing liquid is washed off with pure water, and finally the pure water is blown off with high-pressure air. The countless minute holes can be reliably cleaned and contamination of the cleaning solution in the next lot can be reliably prevented. In addition, if high-frequency vibration is imparted to the high-pressure air, the jet air pressure is imparted with density, and the printing liquid and cleaning liquid residues in countless minute holes can be reliably discharged.
Then, the air containing the cleaning liquid or pure water is sucked from the decompression space 7m of the casing 7a, the air and the cleaning liquid or pure water are separated by the gas-liquid separation device 12, and the separated air is converted into high pressure air by the compressor 17 to the casing 7a. If it is made to supply to the pressurization space 7c, the air used for cleaning will circulate in the closed circuit, and even if an organic solvent is used for the printing liquid and the cleaning liquid, it does not leak to the outside and the working environment. Will not be damaged. Alternatively, air containing cleaning liquid or pure water can be sucked from the decompression space 7m of the casing 7a by the blower 19 and can be supplied to the factory exhaust pipe as it is.

1 is a perspective view showing a schematic configuration of a printing apparatus of the present invention. (a) (b) is the conceptual diagram which looked at the printing apparatus at the time of washing | cleaning of the printing liquid by a washing | cleaning liquid from the front, when not using a gas-liquid separator. It is the conceptual diagram seen from the front at the time of washing | cleaning by a pure water, and drying of an anilox roll by high pressure air. It is a partial expanded sectional view which shows the high pressure air ejection state of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The platen 14 of the printing apparatus according to the present embodiment is a rectangular parallelepiped or thick plate member. For example, a glass substrate 15 is placed at a predetermined position on the upper surface thereof, and the plate cylinder 2 on which the printing plate 3 is mounted rolls on it. During this time, the printing plate 3 contacts the substrate 15 and transfers the printing liquid onto the fine circuit pattern on the substrate 15 to form an alignment film. The surface of the base plate 14 rises to a kiss touch position with respect to the printing plate 3 during printing, and descends to a position away from the printing plate 3 when not printing.

In this embodiment, the printing liquid is used for generating an alignment film, and for example, a polyimide liquid (PI liquid) is used.

Since the cleaning liquid is washed with pure water in a subsequent step, in the case of a polar solvent having compatibility with water, for example, liquid crystal, NMP (N-methyl-2-pyrrolidone) is used as the cleaning liquid for the alignment film forming liquid. Used.
Speaking of the NMP solution, it is an organic compound having a 5-membered ring structure including a lactam structure, and is a colorless or slightly yellowish liquid, one of polar solvents, and water, ethyl acetate, chloroform, benzene, lower It can be mixed with various solvents such as alcohol and lower ketone, and has high solubility. Therefore, it is used as a solvent for various substances, particularly in the field of polymer chemistry.

The plate cylinder 2 is a large cylindrical member made of metal, and a printing plate 3 made of rubber or resin is mounted on the surface so as to cover and wrap the surface of the plate cylinder 2. One end of the mounted printing plate 3 is fixed to the plate cylinder 2, and the other end has a structure capable of absorbing the elongation of the printing plate 3 by a known mounting device.
The plate cylinder 2 on which the printing plate 3 is mounted is for driving a plate cylinder (not shown) between the home position of the apparatus provided with the anilox roll 1 and the end of the surface plate 14 on the opposite side of the anilox roll 1. The motor reciprocates while rotating in the horizontal direction.

The printing plate 3 is formed of a resin plate or a rubber plate, and a printing pattern is formed on the printing surface. (In this embodiment, it is formed in accordance with a fine circuit pattern that is regularly arranged on the substrate 15 like a grid pattern.)

The anilox roll 1 is rotatably installed at the home position of the apparatus, and a known general one can be used. Innumerable minute holes (cells) 1a are regularly and vertically formed on the surface of the anilox roll 1. The opening shape of the minute hole 1a is a regular hexagon, a square or the like, and an appropriate one is selected depending on the type of printing. By selecting the number of mesh lines constituting the microhole 1a and the cell volume (groove volume) of the mesh, the supply amount of the printing liquid to the printing plate 3 can be controlled. The transfer amount of the liquid can be controlled. Usually, the surface of the anilox roll 1 is subjected to a hard (industrial) chrome plating process or a ceramic process in order to improve wear resistance. Hard (industrial) chrome plating and ceramic treatment can reduce adhesion and deposition of printing liquid after cleaning.

The coating unit 4 is, for example, a plate-like scraper or doctor roll disposed so as to be slidable or slidable on the anilox roll 1, and a liquid pool 5 is formed at a slidable contact portion with the anilox roll 1. The In this embodiment, the scraper is the coating unit 4.
The printing liquid is dropped and supplied to the liquid reservoir 5 from a liquid supply unit 6 (for example, a dispenser) disposed above the printing liquid, and the printing liquid is switched and supplied when the printing liquid is washed. The dispenser may be used by switching as described above, but a separate dispenser may be prepared.
The amount of printing liquid applied to the anilox roll 1 is controlled when the coating unit 4 (scraper or doctor roll) is installed on the anilox roll 1.
Below the anilox roll 1, a liquid tray 18 that covers the entire anilox roll 1, the coating unit 4, and the liquid reservoir 5 is installed.

A casing 7 a serving as a drying unit 7 of the anilox roll 1 is installed immediately above the anilox roll 1 and is disposed so as to reciprocate in parallel with the axis of the anilox roll 1.
The internal structure of the casing 7a is a hollow rectangular parallelepiped as shown in FIG. 1, and when the interior is divided into two by a partition 7d as shown in FIG. 3, one is a pressurized space 7c and the other is a decompressed space 7m. In this case, the jet outlet 7b side is set to the downstream side of the suction port 7k, the splashes scattered on the jet outlet 7b side are moved to the suction port 7k along with the rotation of the anilox roll 1, and these are sucked by the upstream suction port 7k.
In the case of FIG. 4, the inside is divided into three spaces by two partition walls 7d, the central space is a pressurized space 7c to which compressed air is supplied, and the space on both sides is a decompressed space 7m. Although the decompression spaces 7m on both sides are described as being independent, they may be communicated.

Further, a compressed air jet port 7b and a suction port 7k are formed on the opposite surface (lower surface) of the casing 7a facing the anilox roll 1, and the jet port 7b is connected to the pressurized space 7c.

In the case of FIG. 3, the compressed air ejection port 7 b provided on the lower surface of the pressurizing space 7 c is formed in a groove shape along the long side of the anilox roll 1 on the downstream side of the casing 7 a. And the protrusion 7e which narrows the opening of the jet nozzle 7b is protrudingly provided in the middle of the partition 7d which forms the jet nozzle 7b. The ridges 7e are a pair, and a slit-like opening between the ridges 7e forms a high-frequency vibration generating unit 13.

In the case of FIG. 4, the compressed air outlet 7 b provided on the lower surface of the pressurized space 7 c is formed in a groove shape in the longitudinal direction of the casing 7 a at the center of the facing surface of the casing 7 a with respect to the anilox roll 1. . A protrusion 7e similar to that shown in FIG. 3 is provided in the middle of the partition wall 7d, and a slit-like opening serves as a high-frequency vibration generator 13 between the protrusions 7e.
In addition, the protrusion 7e is not restricted to an Example as shown in the figure, Two or more can be provided.

The suction port 7k is formed in a slit shape, and is provided along the jet port 7b in the vicinity of the jet port 7b (in this embodiment, both sides thereof). And the suction port 7k is inclined and opened in the jet direction of the compressed air jetted from the jet port 7b. In other words, the angle (inner angle) between the axis of the compressed air ejection direction and the axis of the suction port 7k in the suction direction is formed as an acute angle.
Then, the amount of suction of the suction port 7k is made larger than the amount of air ejected from the jet port 7b, and the inside of the suction space 9 formed between the facing surface of the casing 7a and the anilox roll 1 is exposed to the outside. Thus, the pressure is kept low so that air flows into the suction space 9 from the outside.

On the surface of the casing 7a facing the anilox roll 1, as shown in FIG. 3, a spout 7b and suction ports 7k arranged on both sides thereof are formed.
Since it is not preferable that the facing surface of the casing 7a comes into contact with the anilox roll 1 and scratches the surface of the anilox roll 1, it is set slightly spaced apart and provided with a gap 16 therebetween.

The gas-liquid separator 12 may be installed as shown in FIG. 2 (a) or may be sent as it is to the factory exhaust pipe as shown in FIG. 2 (b). Hereinafter, the case where the gas-liquid separator 12 is installed as shown in FIG.
The gas-liquid separation device 12 is a hollow can body, the decompression pipe 11 is connected to the inlet 12a, the pressurization pipe 10 is connected to the outlet 12b, the decompression pipe 11 is connected to the decompression space 7m of the casing 7a, and the pressurization pipe 10 is connected to the pressurizing space 7c. A compressor 17 is installed in the middle of the pressure pipe 10. A filter 12f is installed in the gas-liquid separator 12, and the separated air is filtered and supplied to the compressor 17 side. Of course, the filter 12 f can be installed outside the gas-liquid separator 12.

On the other hand, the case where it does not install a gas-liquid separator but is sent to a factory exhaust pipe as it is is explained. As shown in FIG. 2 (b), the decompression pipe 11 is connected to the decompression space 7m of the casing 7a, and its outlet is directly connected to the factory exhaust pipe. The blower 19 is installed in the decompression pipe 11 or the factory exhaust pipe.
On the other hand, the pressurizing pipe 10 is connected to the pressurizing space 7c of the casing 7a and sucks outside air. A compressor 17 is installed in the pressurizing pipe 10 in the middle thereof. In this case, the pressure pipe 10 may be connected to the factory high-pressure pipe without providing the compressor 17.
In this case as well, a filter (not shown) is installed in the decompression pipe 11 as necessary.

Next, the operation of the printing apparatus will be described. The process of the printing apparatus is performed according to the following procedure.
(1) Printing on the substrate 15 (2) Cleaning the anilox roll 1 to which the printing liquid is attached with the cleaning liquid (3) The coating part (scraper) 4 is detached from the anilox roll 1 (4) The cleaning liquid is attached Cleaning the anilox roll 1 with pure water (5) Removal and drying of pure water on the anilox roll 1

(1) Printing on the substrate 15 At the time of printing, the printing liquid is dripped and stored from the liquid supply unit 6 to the liquid reservoir 5 and the anilox roll 1 is rotated to apply the printing liquid uniformly on the surface thereof. Then, the plate cylinder 2 on which the printing plate 3 is mounted rotates in synchronization with the anilox roll 1, and the printing liquid on the surface of the anilox roll 1 is applied (primary transfer) to a predetermined area of the printing plate 3.
At the same time, the surface plate 14 with the substrate 15 placed at a predetermined position is synchronously raised to a predetermined height and stands by, and the plate cylinder 2 rolls thereon. As a result, the printing plate 3 is brought into contact with the substrate 15 and rotated, and a printing liquid pattern corresponding to the fine circuit pattern of the substrate 15 is printed (secondary transfer), whereby one printing is completed. This operation is repeated, and when a predetermined number of printings are completed, the process proceeds to a cleaning step for washing off the printing liquid remaining on the surface of the anilox roll 1.

(2) Cleaning the Anilox Roll 1 with the Cleaning Liquid First, the anilox roll 1 is cleaned by dropping the supply droplets dropped from the liquid supply unit 6 from the printing liquid to the cleaning liquid and supplying the cleaning liquid to the liquid reservoir 5. The cleaning liquid supplied to the liquid reservoir 5 is applied to the surface of the anilox roll 1 by the rotation of the anilox roll 1. Although the cleaning liquid and the printing liquid are mixed at the initial time, the cleaning liquid mixed with the cleaning liquid is supplied by the supply of the cleaning liquid and the anilox roll 1 and the new cleaning liquid is supplied by the amount of the outflow. It gradually fades, and finally the printing liquid is washed away, leaving only the cleaning liquid. The cleaning liquid mixed with the printing liquid and the cleaning liquid at the completion of the cleaning are received by the tray 19 installed below the anilox roll 1.
In addition, although the liquid supply part 6 showed the example which switches and supplies a printing liquid and a washing | cleaning liquid, of course, it is not restricted to this, It is also possible to supply separately from different processes.

(3) The coating part (scraper) 4 is detached from the anilox roll 1 When the removal of the printing liquid is completed, the supply of the cleaning liquid is not necessary, and the coating part (the coating part (5) constituting the liquid pool 5 at the contact point with the anilox roll 1) Scraper 4 is released from the anilox roll 1.

(4) Cleaning the anilox roll 1 with the cleaning liquid attached with pure water At this time, the liquid attached to the surface of the anilox roll 1 is only the cleaning liquid. Since the cleaning liquid is a polar solvent, it is highly compatible with pure water. If pure water is evenly dropped onto the surface of the anilox roll 1 while rotating the anilox roll 1, the cleaning liquid is gradually washed away, and only pure water is anilox. It remains on the surface of the roll 1.
The pure water mixed with the cleaning liquid and the pure water at the completion of the cleaning are received by the tray 19 installed below the anilox roll 1 as described above.

(5) Removal of pure water on the anilox roll 1 and drying At this time, only the pure water is attached to the surface of the anilox roll 1 as described above. When this state is reached, the anilox roll 1 is dewatered and dried by the drying unit 7 provided immediately above the anilox roll 1.
In the casing 7a constituting the drying unit 7, high-pressure compressed air is ejected from the upstream or central jet outlet 7b, and the high-pressure compressed air is sprayed on the surface of the anilox roll 1 coming to the opposite surface of the casing 7a. ing.

The high-pressure compressed air vibrates the ridge 7e in the constricted high-frequency generator 13 at the jet outlet 7b, thereby generating high and low air resistance. This high-frequency vibration is superimposed on the jet air ejected from the jet port 7b, and this high-frequency jet air reaches not only the surface of the anilox roll 1 but also the bottoms of countless micro holes 1a, and the surface of the anilox roll 1 and The pure water that has entered the minute hole 1a is blown off. A schematic view of the action of this high-pressure, high-frequency compressed air is shown in the enlarged view of FIG.

The pure water blown off becomes fine droplets in the slight gap 16 and scatters around. However, in the vicinity of the jet outlet 7b, it is sandwiched from both sides (or on the downstream side), and the jet outlet 7b Since the suction port 7k opened in the direction is provided, the fine droplet is sucked into the suction port 7k as it is.
In this case, since the amount of suction air at the suction port 7k is set larger than the amount of air from the jet port 7b, the periphery of the suction port 7k has a negative pressure from the outside. Therefore, fine droplets do not fly out from the slight gap 16.

Fine droplets sucked into the decompression space are sent to the gas-liquid separation device 12 through the decompression pipe 11, and the fine droplets fall and accumulate at the bottom of the gas-liquid separation device 12, and the air is separated by the filter 12f. After being filtered, it is press-fitted into the pressure pipe 10 by suction of the compressor 17.
And it is again sent to the pressurization space 7c of the casing 7a of the drying part 7, and is ejected from the jet nozzle 7b.
By repeating such an operation, not only the surface of the anilox roll 1 but also the pure water in the minute hole 1a is blown off, and the drying of the anilox roll 1 is completed.

In the above case, air mixed with fine droplets is separated using the gas-liquid separator 12 and the separated air is circulated and reused. However, as shown in FIG. You may discharge | release to a factory exhaust pipe as it is through the blower 18 without using the separation apparatus 12. FIG.

1: anilox roll, 1a: minute hole, 2: plate cylinder, 3: printing plate, 4: coating unit, 5: liquid reservoir, 6: liquid supply unit, 7: drying unit, 7a: casing, 7b: jet nozzle 7c: pressurizing space, 7d: partition wall, 7e: ridge, 7k: suction port, 7m: decompression space, 8: pure water supply unit, 9: suction space, 10: pressurization piping, 11: decompression piping, 12: Gas-liquid separator, 12a: Inlet, 12b: Outlet, 12f: Filter, 13: High-frequency vibration generator, 14: Surface plate, 15: Substrate, 16: Gap, 17: Compressor, 18: Liquid pan, 19: Blower.

Claims

A printing plate is installed, and a printing cylinder that transfers the printing liquid applied to the printing plate through the printing plate to a substrate installed on a surface plate,
An anilox roll that rotates in synchronization with the plate cylinder and applies printing liquid to the printing plate;
Applying the printing liquid to the anilox roll during printing, and forming a liquid pool with the anilox roll by sliding against the anilox roll when the printing liquid applied with the cleaning liquid is washed after printing, and after cleaning the anilox roll, anilox A coating part separated from the roll;
A liquid supply unit that supplies the printing liquid to the liquid reservoir during printing and supplies the cleaning liquid to the liquid reservoir when cleaning the anilox roll after printing;
After cleaning with the anilox roll cleaning liquid, pure water is supplied to the surface of the rotating anilox roll, and the pure water supply section for washing off the cleaning liquid;
A high-pressure air spout disposed near the anilox roll and provided on the opposite surface facing the anilox roll, and a pure air blown away by the high-pressure air and the high-pressure air provided adjacent to the spout 7b. An anilox roll automatic cleaning device comprising: a drying section having a casing provided with a suction port for sucking water.
In the automatic cleaning apparatus of an anilox roll according to claim 1,
A gas-liquid separator,
A decompression pipe connecting the decompression space of the casing in which the suction port is formed and the inlet of the gas-liquid separator;
A pressurized pipe connecting the pressurized space of the casing provided with the jet outlet and the exhaust port of the gas-liquid separator;
An anilox roll automatic cleaning device, further comprising a compressor installed in the pressurized pipe and supplying high-pressure air to the pressurized space.
In the automatic cleaning apparatus of an anilox roll according to claim 1,
A decompression pipe connecting the decompression space of the casing in which the suction port is formed and the factory exhaust pipe;
An exhaust blower installed in a decompression pipe or a factory exhaust pipe;
Anilox characterized in that the pressurized space of the casing provided with the jet outlet is connected to the factory high-pressure piping, or a compressor is installed and a pressurized piping for supplying high-pressure air to the pressurized space is further provided. Automatic cleaning device for rolls.
In the automatic cleaning apparatus for anilox roll according to any one of claims 1 to 3,
An automatic anilox roll cleaning apparatus, further comprising a high-frequency vibration generating section for applying high-frequency vibration to high-pressure jet air at a jet outlet of a casing.
An automatic cleaning method using the anilox roll automatic cleaning device according to claim 1,
Apply the printing liquid in the liquid reservoir provided between the anilox roll and the coating part provided at the position facing the anilox roll to the printing plate installed in the plate cylinder,
The plate cylinder is rolled on the substrate to perform printing by bringing the printing plate into contact with the substrate,
Rotate the anilox roll while supplying the cleaning liquid to the liquid reservoir after printing on the substrate to clean the printing liquid on the anilox roll,
After the printing liquid is washed with the cleaning liquid, the coating part is detached from the anilox roll, and then the pure water is supplied to the anilox roll to wash off the cleaning liquid on the anilox roll.
After removing the cleaning liquid with pure water, the casing of the drying unit was brought close to the anilox roll, and high-pressure air was blown from the outlet of the casing to blow off the adhering pure water on the anilox roll, and provided adjacent to the outlet. An automatic cleaning method characterized by sucking the high-pressure air and blown away pure water at a suction port.
An automatic cleaning method using the anilox roll automatic cleaning device according to claim 2,
The air containing the cleaning liquid or pure water is sucked from the decompression space of the casing, and the air and the cleaning liquid or pure water are separated by the gas-liquid separator,
An automatic cleaning method, wherein the separated air is supplied as high pressure air to a pressurized space of a casing by a compressor.
An automatic cleaning method using the anilox roll automatic cleaning device according to claim 3,
Air containing cleaning liquid or pure water is sucked from the decompression space of the casing, and the sucked air is sent to a factory exhaust pipe by a blower.
An automatic cleaning method characterized in that outside air is supplied as high-pressure air to a pressurized space of a casing by a compressor.
An automatic cleaning method using the anilox roll automatic cleaning device according to claim 4,
An automatic cleaning method, wherein high-frequency vibration is applied to high-pressure jet air at a high-frequency vibration generator provided at a jet port of a casing.