JP2018158497A - Wiping washing equipment for intaglio press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that poor washing of a wiping roller is caused because ink dispersion concentration in a wiping solvent becomes high in a conventional immersion type of wiping equipment for intaglio printing; and surplus intaglio ink accumulated on a nylon brush is not completely washed away because only the insufficient fluid volume of the wiping solvent is supplied to a nylon brush unit, in a conventional laminar-flow injection type of equipment.SOLUTION: In the present invention, a wiping solvent is sprayed on a circumferential surface of a wiping roller from a first laminar-flow device. Surplus intaglio ink is removed by a pre-brush and a main brush. The wiping solvent is jetted like a waterfall toward a nylon brush on the pre-brush and the main brush from a second laminar-flow device that is installed in the rear in a wiping roller rotation direction. Thus, the nylon brush is reliably washed, and the surplus intaglio ink on the wiping roller is reliably removed.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a cleaning mechanism for a wiping device in an intaglio printing press.

  As shown in FIG. 1, the intaglio printing method is as follows. Intaglio ink is poured into the ink fountain (1), and the intaglio ink in the order of the duct roller (2), the inking roller (3) and the intaglio plate cylinder (4) The intaglio plate cylinder is provided with a plate-like intaglio plate surface. Of the intaglio ink transferred from the inking plate on the intaglio plate surface, only the intaglio image line portion on the intaglio plate surface is transferred. The remaining intaglio ink remains on the intaglio image line by wiping off the excess intaglio ink (hereinafter referred to as “excess intaglio ink”) remaining on the remaining part of the intaglio image line by wiping with the wiping roller. Printing is performed by pressure transfer to a sheet held on the surface of the cylinder.

A conventional wiping mechanism will be described.
As shown in FIG. 2, of the intaglio ink transferred to the intaglio plate surface installed on the intaglio cylinder (4), the excess intaglio ink (5) adhering to the portion other than the image line portion is removed by the wiping roller (6). The surplus intaglio ink (5) wiped off and adhered to the surface of the wiping roller (6) is immersed in a cleaning liquid (hereinafter referred to as “wiping solvent”) for dissolving and dispersing the surplus intaglio ink (5). The surface of the wiping roller (6) is cleaned by scraping with the prebrush (7) and the main brush (8) in contact with the wiping roller (6) using the rotation of 6), and the surplus on the intaglio plate surface again A process of wiping off the intaglio ink (5) is possible.

Next, a mechanism for immersing excess intaglio ink (5) in a wiping solvent will be described.
FIG. 3 shows an immersion type wiping apparatus. The wiping tank (9) is filled in the wiping tank, and the pre-brush (7) and the main brush (8), which are cleaning devices, are entirely submerged in the wiping solvent (9) in the wiping tank. 6) Excess intaglio ink (5) adhering to the surface is scraped off by the nylon scrubber (10) installed on the upper part of the prebrush (7) and the main brush (8) and dispersed in the wiping solvent (9). By this, the surface of the wiping roller (6) is cleaned.

  In this method, since the wiping solvent (9) is not soiled at the start of printing, the surface of the wiping roller (6) is cleaned cleanly, but as the printing becomes bulky, the excess intaglio ink (5) in the wiping solvent (9) is removed. As the dispersion concentration increases, surplus intaglio ink (5) accumulates on the pre-brush (7) and the main brush (8), and the wiping solvent (9) accumulated in the wiping tank due to the accumulation or the like becomes dirty. Therefore, the cleaning of the wiping roller (6) becomes poor, and linear stains (hereinafter referred to as “solvent stains”) occur on the intaglio plate surface, and the solvent stains adhere to the product and are printed. A defective product will result.

Therefore, the applicant of the present application has invented a laminar jet wiping mechanism shown in Patent Document 2 as a mechanism that can prevent the wiping solvent (9) from being contaminated.
FIG. 4 is an explanatory diagram of a laminar flow injection type mechanism. Unlike the immersion method, this mechanism does not store the wiping solvent (9) in the wiping tank, but wets the surface of the wiping roller (6) with a laminar flow device (11) that ejects the wiping solvent (9) in a waterfall shape from the front. The intermediate injection device installed between the pre-brush (12) and the main brush (14) after washing with a pre-brush (12) having a mechanism for ejecting the wiping solvent (9) in the wiping tank upward (13) The wiping solvent (9) is sprayed directly onto the wiping roller (6), and finally the surplus on the wiping roller (6) by the main brush (14) having a mechanism for ejecting the wiping solvent (9) upward. It is a mechanism for removing the intaglio ink (5).

Further, the pre-brush (12) and the main brush (14) of this mechanism have a metal net having the same curvature as the wiping roller (6) on the brush unit or a plurality of regular holes as shown in FIG. A steel plate (hereinafter referred to as “punching metal”) (17) with a gap of about 1 mm is provided, and a nylon scrubber unit (18) is further provided thereon, so that contact with the wiping roller (6) is kept uniform. The entire surface of the wiping roller (6) is reliably cleaned.
Therefore, by using this mechanism, the excess intaglio ink (5) scraped off from the wiping roller (6) is accumulated as an ink residue not dissolved in the lower part of the wiping tank. As a result, the solvent is not accumulated in the wiping tank, and dissolution and dispersion are suppressed.
Further, since the wiping solvent (9) discharged from the laminar flow device, the pre-brush (12), the main brush (14) and the intermediate injection device (13) circulates, the dirt in the wiping solvent (9) compared with the immersion method. Is a relaxed mechanism (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

JP-A-11-268252 Japanese Patent No. 3709537 Japanese Patent No. 4770659

  However, as shown in FIG. 5, it is installed in the brush unit (15) from the upward injection nozzle port (16) installed in the pre-brush (12) and main brush (14) of the laminar flow injection method. Since the wiping solvent (9) sprayed from the spray nozzle port (16) hits the punching metal (17), the sprayed wiping solvent (9) bubbles without passing through the hole of the punching metal (17), It was found that the liquid level sensor in the tank malfunctioned due to the bubbles.

  Further, since the portion of the punching metal (17) where the hole is not formed is covered with the iron plate, a part of the sprayed wiping solvent (9) does not pass through the hole of the punching metal (17), and the uppermost portion Since the amount of the wiping solvent (9) supplied to the nylon scrubber unit (18) is not sufficient, the excess intaglio ink (5) deposited on the nylon scrubber unit (18) is not completely washed, and the wiping roller (6) It was found that unwashed residue was generated on the top, and solvent stains were produced on the product due to the stain due to the unwashed ink.

  Further, as shown in FIG. 8, the pre-brush (12), the main brush (14), and the intermediate injection device (13) are each provided with circulation pumps (26) necessary for jetting the wiping solvent (9) upward. (27) Although (28) is used, it has been found that a pump failure, a wiping solvent leak from the pump, etc. occur, causing a machine stoppage or machine failure each time.

  In order to solve the above-mentioned problems, the present invention is directed to foaming of the wiping solvent (9) generated on the nylon scrubber unit (18) installed on the punching metal (17) and stain due to excess ink (5) remaining after washing. And by eliminating the circulation pumps (26), (27) and (28) for ejecting the wiping solvent (9) from the pre-brush (12), the main brush (14) and the intermediate injection device (13) In order to remove the cause of the failure, the cleaning method of the surface of the wiping roller (6) has been improved.

  In order to solve the above-described problems, the present invention provides a cleaning mechanism for an apparatus for cleaning excess intaglio ink (5) adhering to the surface of a wiping roller (6) in a wiping portion of an intaglio printing press. The first laminar flow device (11) for spraying the wiping solvent (9) for dissolving / dispersing) in a laminar flow state continuously along the circumferential surface of the wiping roller (6) by a jet port for generating a laminar flow ), Pre-brush (7) and main brush (8) for mechanically removing excess intaglio ink (5) from the circumferential surface of the wiping roller (6), and excess intaglio ink (5) attached to the main brush (8) And a second laminar flow device (19) for cleaning the intaglio printing machine.

  Further, the pre-brush is configured to be installed on the entering side of the wiping roller in the rotational direction.

  Further, the main brush is configured to be installed on the downstream side of the pre-brush.

  The second laminar flow device is configured to be installed on the downstream side of the main brush.

  Further, the prebrush and the main brush have a configuration in which a flexible synthetic fiber scrubber is installed at the uppermost part of the brush and is in surface contact with the wiping roller.

  Further, the pre-brush and the main brush are configured using a metal plate having a plurality of holes in the lower part of the scrubber.

  In addition, the second laminar flow device has a structure in which a solvent inlet is provided in the lower part and a jet outlet having a width equal to or wider than the width of the main brush is provided in the upper part. .

  Further, the second laminar flow device has a configuration in which a plurality of solvent flow weirs are provided between the solvent inlet and the jet port.

  Further, the plurality of solvent flow rate weirs are provided alternately.

  Further, the second laminar flow device is configured such that the wiping solvent flows down from the jet outlet in a waterfall shape.

  Since the excess intaglio ink deposited on the brush is reliably washed by flowing a large amount of wiping solvent from the rear in the direction of rotation of the wiping roller, which is a feature of the wiping washing apparatus of the present invention, the nylon scrubbing is washed. As a result, the excess intaglio ink on the wiping roller wiped off from the intaglio plate surface can be surely removed, and the heat generation and wear of the roller and the wear of the intaglio plate surface can be suppressed.

  In addition, a pre-brush equipped with a mechanism for ejecting the wiping solvent in the wiping tank, which has been provided so far to compensate for the shortage of the wiping solvent, by flowing a large amount of wiping solvent from the rear in the rotation direction of the wiping roller Since the main brush and the intermediate ejection device are unnecessary, the prevention of foaming of the wiping solvent due to the ejection of the wiping solvent and the respective members used for ejecting the wiping solvent are unnecessary. Since the pumps that have supplied the wiping solvent can be removed, the risk of machine failure due to the pumps can be reduced.

It is the schematic regarding the intaglio printing part in this invention. It is the schematic regarding the wiping part in this invention. It is the schematic of the conventional wiping solvent immersion type wiping apparatus. It is the schematic of the conventional wiping solvent laminar-flow type wiping apparatus. It is the schematic of the punching metal and injection apparatus in the conventional wiping solvent laminar-flow type wiping apparatus. It is the schematic of the wiping washing | cleaning apparatus in this invention. It is the schematic of the 2nd laminar flow apparatus in this invention. It is the schematic of the wiping solvent circulation path of the conventional wiping liquid laminar flow type. It is a layout of the pump in the form for carrying out the present invention.

Embodiments for carrying out the present invention will be described with reference to the drawings.
As shown in FIG. 6, after the wiping roller (6) is in contact with the intaglio plate surface and wipes off the excess intaglio ink (5), the wiping roller (6) is installed on the side where the wiping roller (6) in the wiping tank enters the rotational direction “Y”. After the wiping solvent (9) is ejected from the first laminar flow device (11) in a waterfall shape, the surface of the wiping roller (6) is moistened, washed with the prebrush (7) in the wiping tank, and then the prebrush The excess intaglio ink (5) on the wiping roller (6) is removed by the main brush (8) installed downstream of (7), and finally the second layer installed further downstream of the main brush (8). The wiping solvent (9) is ejected from the flow device (19) in a waterfall shape, and the remaining ink on the pre-brush (7) and the nylon brush (10) installed on the main brush (8) is washed. ing.

  The second laminar flow device (19) has a large jet (20) as shown in FIG. 7, and the wiping charged from the right solvent inlet (21) provided at the lower part of the device. The main brush shown in FIG. 6 from the jet nozzle (20) passes through the solvent flow rate adjusting weir (22) provided alternately on the inner side surface so that the flow rate of the wiping solvent (9) is uniform. (8) The wiping solvent (9) has a mechanism that falls in a waterfall and flows down in large quantities.

  The arrangement of the pump for supplying the wiping solvent to the first and second laminar flow devices is as shown in FIG. 9, and a pre-brush (12 having a mechanism for ejecting the wiping solvent upward as shown in FIG. 8 is used. ) Since the main brush (14) and the intermediate spray device (13) are not required, the pumps (26), (27) and (28) used for them are removed, and the wiping solvent circulation management device (23) The circulation pumps in the lower part are simplified.

DESCRIPTION OF SYMBOLS 1 Ink fountain 2 Duct roller 3 Thickening roller 4 Intaglio cylinder X Rotation direction of intaglio cylinder "4" 5 Excess intaglio ink 6 Wiping roller Y Rotation direction of wiping roller "6" 7 Prebrush 8 Main brush 9 Wiping solvent 10 Nylon Tawashi 11 laminar flow device (first)
12 Pre-brush (with spray function)
13 Intermediate injection device 14 Main brush (with injection function)
15 Brush unit 16 Injection nozzle port 17 Punching metal 18 Nylon scrub unit 19 Laminar flow device (for second)
20 Jet 21 Solvent input 22 Solvent flow rate control weir 23 Wiping solvent circulation management device (A tank, B tank)
24 Return pump 25 Laminar flow device circulation pump (for 1st)
26 Pre-injection circulation pump 27 Intermediate injection circulation pump 28 Main injection circulation pump 29 Solenoid valve valve 30 Laminar flow pump (for second use)

Claims (10)

In the wiping portion of the intaglio printing machine, a cleaning mechanism of a device for cleaning excess intaglio ink attached to the surface of the wiping roller,
A first laminar flow device for spraying a cleaning liquid for dissolving and dispersing ink in a laminar flow state continuously along a circumferential surface of the wiping roller by a nozzle that generates a laminar flow;
A pre-brush and a main brush that mechanically remove ink from the circumferential surface of the wiping roller;
A wiping cleaning device for an intaglio printing press comprising a second laminar flow device for cleaning excess intaglio ink adhering to the main brush.   2. The wiping cleaning device for an intaglio printing press according to claim 1, wherein the pre-brush is installed on the side of the wiping roller that enters the rotational direction.   The wiping cleaning device for an intaglio printing press according to claim 1 or 2, wherein the main brush is installed downstream of the pre-brush.   The wiping cleaning device for an intaglio printing press according to any one of claims 1 to 3, wherein the second laminar flow device is installed on the downstream side of the main brush.   5. The pre-brush and the main brush are provided with a synthetic fiber scrubber at the top of the brush and are in surface contact with the wiping roller. 6. Wiping cleaning device for intaglio printing machines.   The wiping cleaning device for an intaglio printing press according to any one of claims 1 to 5, wherein the main brush uses a metal plate having a plurality of holes in a lower portion of the scrubber.   The second laminar flow device is provided with a solvent inlet at a lower portion and provided with an ejection port having a width equal to or wider than the width of the main brush at an upper portion. A wiping cleaning device for an intaglio printing press according to any one of claims 1 to 6.   The intaglio printing press according to any one of claims 1 to 7, wherein the second laminar flow device is provided with a plurality of solvent flow rate weirs between the solvent inlet and the jet port. Wiping cleaning device.   The wiping cleaning device for an intaglio printing press according to any one of claims 1 to 8, wherein the plurality of solvent flow rate weirs are provided alternately.   The wiping cleaning device for an intaglio printing press according to any one of claims 1 to 9, wherein the second laminar flow device causes the wiping solvent to flow down from the ejection port in a waterfall shape.

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