JP2000202984A - Wiping device for intaglio printing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and reliably remove surplus ink from a wiping roller of an intaglio printing press, prevent foaming of a cleaning liquid, prevent deterioration of the cleaning power of the cleaning liquid, and generate heat of the roller. To obtain good printed matter and high-speed printing for a long time, and to reduce the burden on the operator. The present invention relates to a wiping device for an intaglio printing press, comprising a wiping roller (11) and a first cleaning member (3).
A cleaning liquid circulation management tank 15 that collects the cleaning liquid flowing down from each cleaning member and recirculates the cleaning liquid to each cleaning member.
Cleaning member 3 is arranged at the uppermost stream on the roller 11 and falls so as to flow on the surface in a laminar flow state, and the second cleaning member 4
The cleaning cycle is enabled by a cleaning liquid circulation management tank 15 arranged at the lowermost stage and disposed below the first cleaning member 3 and scraped off by the finishing blade 10 at the lowermost stage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping device for an intaglio printing press.

[0002]

2. Description of the Related Art Generally, a conventional wiping device of an intaglio printing press comprises a resin wiping roller 11 for wiping ink on a plate surface, as shown in FIG.
Cleaning liquid 1 for dissolving and dispersing the ink adhering to it
A cleaning tank 1 called an immersion-type cleaning tank filled with a brush 4 and a plurality of brush groups 13 having a function of mechanically removing ink by contacting the wiping roller 11 and / or A member that has an opening that does not hinder the removal of ink and has a flexible synthetic fiber scrubber 5 placed on the brush group 13 and brought into surface contact with the wiping roller 11, and a member positioned downstream of the member. And a steel finishing blade 10 for wiping the cleaning liquid remaining on the wiping roller, and printing (pattern) is performed on paper by a printing unit (not shown).

In the conventional immersion type wiping device, 1
At a printing speed of less than 50 sheets / min, the contact time between the cleaning liquid or the cleaning member and the wiping roller is long, and the ink adhered to the surface of the wiping roller can be completely dissolved and dispersed, and the ink can be dissolved and dispersed. The thin cleaning liquid layer remaining on the roller surface after being removed is also removed by the finishing blade, and the completely cleaned roller again enters a cycle for wiping the ink on the plate surface, thereby removing the stained intaglio print. It was possible to print.

However, in the above-described conventional wiping apparatus, while the cleaning liquid is fresh, the wiped ink is efficiently dissolved and dispersed in the cleaning liquid. The density is increased, and the dissolving and dispersing ability of the ink is reduced, so that the undissolved ink gradually accumulates in the scourer located above the cleaning member. Therefore, when the number of continuous prints reaches about 30,000 or more, the ink on the wiping roller cannot be completely wiped off, and a small amount of the ink adheres to the printed matter, which is referred to as a “remaining wipe”. A printing defect called "solvent stain" in which the cleaning liquid adheres to the printed matter has occurred. When such an event occurs, the operator needs to temporarily stop the printing machine and take measures such as cleaning the cleaning member and changing the cleaning liquid, which increases the downtime and increases the downtime. There has been a problem that the washing operation is an unfavorable operation for the operator to stain the work clothes and hands.

On the other hand, when high-speed printing is performed at 150 sheets / min or more, the cleaning liquid filled in the immersion type cleaning tank forms a thick cleaning film pressure layer on the wiping roller due to an increase in the speed of the wiping roller and is located downstream. Appears as an impact on the steel finishing blade, which is strongly pushed up, so that a very small gap is generated between the wiping roller and the blade, and a phenomenon occurs in which the cleaning liquid cannot be completely removed. This phenomenon is called the "fluid rising phenomenon" .However, since the next cleaning cycle of the plate surface is entered with the cleaning liquid remaining on the surface of the wiping roller, the ink in the plate surface is dissolved to blur the printed matter, Since the quality of the printed matter is significantly impaired, for example, the cleaning liquid adheres to the paper, there is a problem that the speeding up of the intaglio printing press is hindered.

In order to solve such a problem, a cleaning mechanism for spraying a cleaning liquid from below the cleaning member toward the wiping roller 11 and a cleaning liquid for the thin film layer remaining on the roller surface after the injection cleaning are removed. A non-wetting type wiping device shown in FIG. 5 has been developed (Japanese Patent Application No. 10-92249), which is composed of a cleaning liquid recovery device 16 which can be used to wipe off excess ink on the plate surface depending on the type of ink. High pressing force is required between the printing plate and the wiping roller,
As a result, the friction heat generated is transmitted to the wiping roller, and as a result, the wiping roller expands abnormally, and the power load on the wiping roller increases rapidly, causing a power failure, or the wiping roller softens due to the friction heat. As a result, there occurred a phenomenon that the surface caused baking damage.

In order to avoid this phenomenon, it is theoretically possible to supply a sufficient amount of cleaning liquid from the lower portion of the cleaning member to cool the wiping roller in the apparatus. However, since the required cleaning liquid becomes enormous, It was found that the size of the wiping tank was limited and the size of the cleaning liquid recovery / circulation device was too large to be practical.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned conventional problems, and has as its object to reduce the number of rotations of the wiping roller from the entry side.
A cleaning mechanism for continuously supplying the cleaning liquid, a cleaning mechanism for spraying the cleaning liquid from below the cleaning member toward the wiping roller, and an effective removal of the cleaning liquid for the thin film layer remaining on the surface of the wiping roller after the injection cleaning. By providing a wiping device composed of an auxiliary device that can perform cleaning and a cleaning liquid circulation management tank that collects and recirculates the cleaning liquid, the excess ink on the wiping roller can be quickly and reliably removed, and the cleaning liquid can be removed. To prevent the generation of bubbles and prevent the deterioration of the cleaning power of the cleaning liquid, suppress the heat generation of the wiping roller, obtain good printed matter for a long time and enable high-speed printing, and also reduce the burden on the operator. It is in.

[0009]

SUMMARY OF THE INVENTION In order to solve these problems, the present invention provides a wiping section of an intaglio printing machine, which is used as a cleaning mechanism of a device for cleaning excess ink adhered to the surface of a wiping roller. A first cleaning member for continuously supplying a cleaning liquid for dispersing to the wiping roller, a member for mechanically removing ink, and a cleaning liquid for dissolving and dispersing ink remaining at a lower portion of the member; A wiping device for an intaglio printing press, wherein a second cleaning member comprising a device and a cleaning liquid circulation management tank are provided.

The first cleaning member is a wiping device for an intaglio printing press, wherein the first cleaning member is provided on the rotation direction entry side of the wiping roller.

Further, the second cleaning member is a wiping device for an intaglio printing press, wherein the second cleaning member is provided downstream of the first cleaning member.

Further, the first cleaning member is a wiping device for an intaglio printing machine, wherein a laminar flow generating nozzle or a turbulent flow generating nozzle is used.

[0013] The second cleaning member is made of a synthetic fiber made of flexible synthetic fibers having a plurality of rows of laminar flow generation or turbulence generation nozzles and openings above the nozzles which do not hinder the removal of ink. A wiping device for an intaglio printing press, comprising: a swash, and in surface contact with the wiping roller.

Further, there is provided a wiping device for an intaglio printing press, wherein a metal net is provided below a scourer of the second cleaning member.

A wiping device for an intaglio printing press, characterized in that a metal plate having a plurality of holes is provided below the scrubber of the second cleaning member.

A wiping device for an intaglio printing machine characterized in that most of the ink dissolved in the washing liquid can be isolated by sedimentation due to a difference in specific gravity and can be recirculated as a reusable washing liquid.

In the cleaning liquid circulation management tank, the bottom of the tank is inclined, an outlet orifice is provided at the bottom of the tank, a waste liquid having a high ink concentration is removed therefrom, and a supply port for supplying a new cleaning liquid is provided. A wiping device for an intaglio printing press, comprising:

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With the above configuration, the ink adhered to the wiping roller is supplied to the cleaning liquid supplied to the circumferential surface of the wiping roller by the first laminar flow generation nozzle or the turbulence generation nozzle. Dissolving and dissolving the member that mechanically removes the ink and the ink remaining under the member
It is dissolved and dispersed by the synergistic effect of the second cleaning member that injects the cleaning liquid for dispersion, and the accumulation of undissolved ink in the portion that comes into contact with the wiping roller can be prevented.

Further, even at the time of high-speed printing at 150 sheets / min or more, since the cleaning film pressure layer formed on the wiping roller is thin, an impact may be applied to the steel finishing blade located at the most downstream position. Therefore, the contact between the roller and the finishing blade can be maintained in the same state as at low speed.

Further, since a constant amount of cleaning liquid is constantly sprayed onto the roller surface from the entrance side of the wiping roller, the temperature rise of the roller can be suppressed. Therefore, the wiping roller is generated by friction heat generated by a high pressing force between the plate surface and the wiping roller. Expansion and softening can be prevented beforehand.

The wiping roller is worn by a pressing force generated between the wiping roller and the plate cylinder, and a delicate gap between the wiping roller and the cleaning member allows ink to accumulate, thereby causing stains on printed matter. However, even in such a case, it is possible to stop only the supply of the sheet without stopping the printing machine, and to wash the cleaning member by the self-cleaning action of the jet cleaning device.

[0022]

FIG. 1 shows an embodiment of a wiping device of an intaglio printing press according to the present invention.
A first cleaning member 3 having a device for spraying the roller with a cleaning liquid for dissolving and dispersing the ink, wherein the ink attached to the surface of the roller 1 is placed on the entry side in the rotation direction of the roller 11;
A second cleaning member 4 which is located downstream of the member and mechanically removes the ink, and includes a device for injecting a cleaning liquid for dissolving and dispersing the ink into a lower portion of the member; It comprises a finishing blade 10 used in a wiping device, a non-wetting type wiping tank 1, and a cleaning liquid circulation management tank 15.

The first cleaning member 3 continuously sprays a cleaning liquid for dissolving and dispersing the ink on the circumferential surface of the wiping roller 11 by a laminar flow generation nozzle or a turbulent flow generation nozzle, and the ink remaining on the roller. Is dissolved and dispersed.

The second cleaning member 4 is made of a synthetic fiber made of a flexible synthetic fiber having a metal net 6 attached to a base frame incorporated on a holder and having an opening on the base frame 6 which does not hinder the removal of ink. The ink which has been wiped off from the intaglio cylinder 12 adheres to the wiping roller 11, and the ink adhered to this roller is transferred onto the metal net 6. Sardines 5 on
Wipe off mechanically with. The wiped ink is dropped from the opening of the scrubber 5 to the lower part of the wiping tank 1 while being dissolved and dispersed by the high-pressure cleaning liquid blown out from the injection nozzle 8 of the cleaning liquid injection device 7. At this time, the metal net 6 has the same curvature as that of the wiping roller 11, and a pressing force is applied to the roller.

With the construction of the first and second cleaning members according to the present invention, the ink on the wiping roller 11 is cleaned by the cleaning liquid sprayed by the laminar flow generation nozzle or the turbulence generation nozzle 3 and the lower part of the scrubber 5. Is dissolved and dispersed by the high-pressure cleaning liquid injected from the
0 completely removes the lower part of the wiping tank 1.
In this embodiment, it is also possible to use only the jet nozzles 8 in a plurality of rows for cleaning without using the scrubber 5.

At a printing speed of 150 sheets / min or more,
Because of the non-wetting type, the cleaning layer remaining on the wiping roller 11 after the second cleaning becomes thin, and the impact of the cleaning liquid applied to the finishing blade 10 located downstream can be effectively suppressed. Can be prevented from rising. In this way, the cleaning liquid remaining on the wiping roller 11 can be reliably removed.
The surface of the wiping roller 11 is completely cleaned.

Also, the cleaning liquid removed at the lower portion of the wiping tank 1 is collected in the cleaning liquid circulation control tank 15, and the circulation and supply are repeated, so that the cycle for wiping the ink on the plate surface can be started again. It is possible to print a stain-free intaglio print stably for a long time without accumulating undissolved ink.

Further, by constantly spraying a fixed amount of cleaning liquid on the roller surface from the wiping roller entrance side,
Since the temperature rise of the roller can be suppressed, expansion and softening of the wiping roller due to frictional heat generated by a high pressing force between the plate surface and the wiping roller can be prevented.

Even if these measures are taken, the wiping roller 11 is worn by the pressing force generated between the wiping roller 11 and the intaglio cylinder 12, and the delicate clearance between the wiping roller 11 and the second-stage cleaning member 4 causes the accumulation of ink. And prints may be stained. Even in such a case, only the supply of paper is stopped without stopping the printing machine, and the cleaning member 4 can be cleaned by utilizing the self-cleaning action of the ejecting device 7, thereby significantly reducing the burden on the operator. Can be reduced.

In the first cleaning member 3, the cleaning liquid 14 sent from the cleaning liquid circulation management tank 15 is continuously sprayed on the wiping roller in a laminar flow state. An aqueous cleaning liquid having a low odor can be effectively used depending on the type of ink. In this case, although the solvent cleaning liquid has an excellent cleaning effect, it is necessary to take measures for the working environment such as providing a local exhaust device. Therefore, the use of an aqueous cleaning solution is desired, but in this case, bubbles are generated by the surfactant and the like contained in the cleaning solution. The generation of this foam is extremely promoted by the incorporation of air, and significantly impairs the wiping effect. For this reason, the cleaning liquid 14 sprayed on the wiping roller 11 needs to be supplied in a laminar flow state so as not to be trapped by air, in addition to preventing air from being mixed into the liquid sending pipe. For this reason, the laminar flow generation nozzle or the turbulent flow generation nozzle 3 can be used in the case of the solvent type cleaning liquid, and the nozzle 3 used in the laminar flow state or special processing is performed in the case of the aqueous type cleaning liquid. It is necessary to properly use the injection nozzle 3 that has been used.

FIG. 2 shows an embodiment of a configuration example of the second cleaning member of the present invention. The metal net 6 of (c) is mounted on the cleaning member 4 in which the injection nozzle 8 is incorporated as shown in (d), and the tension of the net 6 is appropriately adjusted so as to follow the curvature of the wiping roller 11. . On top of this, the scrubber 5 shown in (b) made of a synthetic fiber which is flexible and has an opening which does not hinder the removal of ink is placed, and has a function of making surface contact with the wiping roller 11. . (E) is the figure which looked at the state which combined (b)-(d) from the front, and (a) was the figure seen from the side.

[0032]

As described above in detail, according to the present invention, the ink wiped off by the wiping roller is dissolved by a combination of the cleaning liquid supplied by the first nozzle and the cleaning liquid jetted from the second lower part. -By repeating the cycle of collecting, circulating and supplying this washing liquid after dispersion,
The accumulation of undissolved ink in a portion where the cleaning member contacts the wiping roller can be prevented.

Further, even at the time of high-speed printing at 150 sheets / min or more, since the coating layer of the cleaning liquid formed on the wiping roller is thin, it does not impact the steel finishing blade located downstream. Therefore, the contact between the wiping roller and the finishing blade can be maintained in the same state as at low speed. In addition, since a constant amount of cleaning liquid is constantly sprayed onto the roller surface from the entrance side of the wiping roller, the temperature of the wiping roller can be suppressed from rising, so that the wiping roller expands due to frictional heat generated by a high pressing force between the plate surface and the wiping roller. And softening can be prevented beforehand. Even if these measures are taken, the wiping roller is worn by the pressing force generated between the wiping roller and the plate cylinder, and the delicate gap between the wiping roller and the second cleaning member caused by the wiping roller allows the accumulation of ink, and the printed matter becomes dirty. However, even in such a case, only the supply of paper is stopped without stopping the printing machine, and the cleaning member can be cleaned by the self-cleaning action of the jet cleaning device. Unlike a weir-type wiping device, solvent contamination and liquid rise are eliminated, and good printed matter can be stably printed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a wiping device of an intaglio printing press according to the present invention.

FIG. 2 is a view showing a second cleaning member (metal net) and the configuration thereof.

FIG. 3 is a view showing a second cleaning member (a metal plate having a plurality of holes).

FIG. 4 is a diagram showing a conventional wiping device.

FIG. 5 is a view showing a conventional non-wetting type wiping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wiping tank 2 Cleaning member (immersion type wiping) 3 First cleaning member (nozzle) 4 Second cleaning member 5 Tawashi 6 Metal net 7 Injection device 8 Injection nozzle 9 Finishing blade holder 10 Finishing blade 11 Wiping roller 12 Intaglio cylinder 13 Brush 14 Cleaning liquid 15 Cleaning liquid circulation management tank 16 Cleaning liquid recovery (suction) device 17 Auxiliary blade 18 Exit orifice 19 Cleaning liquid (new liquid)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirofumi Takano 3-6-32 Minami Kamomiya, Odawara City, Kanagawa Prefecture 2C034 CA02 CA16 CA18 2C250 DA07 FA04 FB02 FB06 FB09 FB11 2H113 AA05 BA03 FA10 FA38 FA48

Claims (9)

[Claims] In a wiping section of an intaglio printing machine, a first cleaning liquid for dissolving and dispersing ink is continuously supplied to a wiping roller as a cleaning mechanism of a device for cleaning excess ink adhering to the surface of a wiping roller. And a second cleaning member comprising a member for mechanically removing the ink, and a device for injecting a cleaning liquid for dissolving and dispersing the ink remaining in the lower portion of the member. Wiping device for intaglio printing press. 2. The wiping device of an intaglio printing press according to claim 1, wherein the first cleaning member is installed on a rotation direction entry side of a wiping roller. 3. The wiping device for an intaglio printing press according to claim 1, wherein the second cleaning member is provided downstream of the first cleaning member. 4. The wiping device for an intaglio printing press according to claim 1, wherein a laminar flow generating nozzle or a turbulent flow generating nozzle is used as the first cleaning member. 5. The second cleaning member is made of a synthetic fiber having a plurality of rows of laminar or turbulent flow generating nozzles and an opening above the nozzles that does not hinder the ink from escaping, and is flexible. 2. The wiping device of an intaglio printing press according to claim 1, wherein the wiping roller is made of a swash and is in surface contact with the wiping roller. 6. The wiping device for an intaglio printing press according to claim 1, wherein a metal net is provided below the scourer as the second cleaning member. 7. The wiping device for an intaglio printing press according to claim 1, wherein a metal plate having a plurality of holes at a lower portion of the scourer is used as the second cleaning member. 8. The wiping device for an intaglio printing press according to claim 1, wherein most of the ink dissolved in the cleaning liquid can be isolated by sedimentation due to a difference in specific gravity and can be recycled as a reusable cleaning liquid. . 9. The cleaning liquid circulation management tank has a slope at the bottom of the tank, an outlet orifice provided at a lower portion of the tank, a waste liquid having a high ink concentration is removed therefrom, and a supply port for supplying a new cleaning liquid is provided. The wiping device for an intaglio printing press according to claim 1, wherein the wiping device is provided.