JP3170905B2 - Gravure plate cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate cylinder used in gravure printing.

[0002]

2. Description of the Related Art As shown in FIG. 5, a cylindrical plate cylinder for printing used in a gravure printing method has an outer peripheral surface 2 of a plate cylinder 1 as shown in FIG.
The ink blade 3 is provided with an ink cell 3 for forming a printing image portion. The lower peripheral surface is immersed in the gravure printing ink 5 in the ink tank 4 and rotated at a high printing speed. 6, the excess ink is scraped off, and the plate cylinder 1 and an impression cylinder 7 facing the upper peripheral surface thereof are removed.
(E.g., rubber), a printing sheet w (elongated sheet, sheet sheet) is introduced, and a printing image 5 is printed on the printing sheet w.
Print b.

[0003]

When the ink 4 is supplied to the plate cylinder 1 while the plate cylinder 1 for gravure printing is immersed in the ink 5 and rotated, both end faces 1b of the plate cylinder 1 in the direction of the rotation axis 1a are provided. The ink 5 also adheres to the ink.

The ink 5 adhering to the both end surfaces 1b of the plate cylinder 1 rotating at a high printing speed in the ink tank 4 generates ink droplets 5a above the plate cylinder 1 due to the centrifugal force of the high-speed rotating plate cylinder 1. The support shaft 7a of the impression cylinder 7 which rotates while being supported by the support shaft 7a on the upper peripheral surface of the plate cylinder 1 and both end surfaces 7b of the impression cylinder 7 are soiled, and the printing sheet w is removed. May be soiled.

According to the present invention, when printing is performed by supplying ink to the plate cylinder by rotating the gravure printing plate cylinder while immersing the plate cylinder in the ink, the opposing impression cylinder and the printing sheet are not stained by the ink splash. Is to do so.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a cylindrical gravure printing plate cylinder 1 having both end faces 1b projecting outward from the center of rotation of the plate cylinder on both sides thereof and from both sides of the end face 1b.
Phosphorus projecting outward in the width direction from both end surfaces 7b of the impression cylinder 7
Gravure printing characterized by providing a ridge-shaped ridge 8
And a gravure stamp according to the present invention.
A printing plate cylinder, wherein a predetermined interval is provided on an upper peripheral surface of the convex bank portion 8;
The ink splash prevention plate 9 facing the gravure
Gravure characterized in that it is attached to the main body frame
This is a printing plate cylinder.

[0007]

FIG. 1 is a side view of an embodiment of a gravure printing plate cylinder A according to the present invention, and shows a rotary support shaft 1a for supporting a gravure printing plate cylinder body 1 (attached integrally to the plate cylinder body 1). A support shaft or a support shaft attached to and removable from the plate cylinder body 1).
1b, a ring-shaped ridge 8 having a height t is provided.

The height t of the ridge 8 is suitably about 5 mm to 15 mm, but the present invention is not limited to this.

The convex ridge portion 8 is provided on the side end surface 1 of the plate cylinder main body 1.
It is appropriate to attach the outer edge of the convex ridge portion 8 to the outer edge of the b in such a manner that the outer edge is aligned with the outer edge. However, the present invention is not limited to this. Good.

The thickness s of the embankment portion 8 may be an appropriate thickness, for example, about 10 mm is sufficient. However, the present invention is not limited to this.
Can be installed so as to be inscribed in the outer periphery of the.

The ridge 8 is installed on the plate cylinder main body 1 in such a manner that it can be attached to and detached from both side end faces 1b integrally or by screwing.

As shown in FIG. 1, the gravure printing plate cylinder A of the present invention is used by immersing its lower peripheral surface in gravure printing ink 5 in an ink tank 4 and rotating it.

FIG. 2 is a side view of a gravure printing plate cylinder A according to an embodiment of the present invention. The ink is charged into an ink cell 3 by being immersed in ink 5 and rotated. The surplus ink on the outer peripheral surface 2 of the plate cylinder 1 is scraped off by the doctor blade 6 which is in peripheral contact with the outer peripheral surface 1 or the outer peripheral surface 2 of the plate cylinder main body 1 and the outer peripheral surface of the ridge 8. Printing is performed on a printing sheet w introduced between the cylinder main body 1 and the impression cylinder 7.

In the present invention, it is desirable that the doctor blade 6 is in contact with the outer peripheral surface 2 of the plate cylinder main body 1 and the outer peripheral surface of the convex bank portion 8.

The gravure printing plate cylinder A of the present invention can be used as described in FIGS. 1 and 2 in place of a conventional printing plate cylinder. For example, there are those described below.

FIG. 3 is a front view illustrating an example of use of the printing plate cylinder A of the present invention, which is supported on a gravure printing apparatus main body frame F via a support shaft 1a, and a pressure plate facing the upper side thereof. The cylinder 7 (metallic impression cylinder whose peripheral surface is formed of a material such as metal or rubber or press board paper) is supported.

The ink repellents facing each other at a predetermined interval (for example, a small interval of 15 mm or less) are provided on the upper peripheral surfaces of the convex ridges 8 on both sides attached to both end surfaces 1b of the printing plate cylinder A. The prevention plate 9 (for example, a metal plate such as aluminum or an iron plate, a resin plate, or the like) is attached to the gravure printing apparatus main body frame F.

In the gravure printing plate cylinder A of the present invention, as shown in FIG. 1, the convex ridges 8 are provided so as to protrude outward from both side end surfaces 1b of the plate cylinder main body 1, and When the widths (lengths in the support axis direction) of the impression cylinders 7 are equal to each other, the outer end face of the ridge 8 is larger than both end faces 7b, 7b of the impression cylinder 7 facing the upper side of the plate cylinder A. It protrudes outward in the width direction.

Further, even when the width of the plate cylinder main body 1 is wider than the width of the impression cylinder 7 (length in the direction of the support shaft), the outer end face of the ridge 8 has a pressure opposite to the upper side of the plate cylinder A. Both end surfaces 7b, 7 of body 7
It protrudes further outward in the width direction than b.

The gravure printing plate cylinder A of the present invention is shown in FIG.
As shown in FIG. 2, the ridges 8, 8 immersed in the ink 5 in the ink tank 4 and rotated so as to protrude outward in the width direction from both end surfaces 1 b of the plate cylinder main body 1, raise the ink 5 upward. When flipping up, the both end surfaces 7b of the impression cylinder 7 facing the upper side thereof,
The ink droplets 5a are repelled outward in the width direction from 7b.

When the ink repelling prevention plate 9 described above with reference to FIG. 3 is supported and installed on the apparatus main body frame F, as shown in FIGS. When the ink 5 is repelled upward, the upper side of the impression cylinder 7
This prevents the ink splash 5a, which is splashed outward in the width direction from both end surfaces 7b, 7b, from being splashed upward by the ink splash prevention plate 9.

[0022]

The gravure printing plate cylinder of the present invention is provided with ring-shaped ridges 8, 8 projecting outward in the width direction from both end surfaces 1b, 1b of the gravure printing plate cylinder main body 1. , 8
To both end surfaces 7b, 7 of the impression cylinder 7 facing the plate cylinder body 1.
b, it is provided to protrude outward in the width direction. Therefore, when the ink 5 is repelled upward, the ink droplets 5a are repelled outward in the width direction from both side end surfaces 7b, 7b of the impression cylinder 7 opposed to the upper side. The end face 7b of the impression cylinder 7 and the printing sheet w can be prevented from being stained by the ink droplets 5a.

Also, by installing and using an ink splash prevention plate 9 above the ridge 8, the ridges 8, 8 are provided.
When the ink splashes upward, the ink droplets 5a which are splashed outward in the width direction from both end surfaces 7b, 7b of the impression cylinder 7 facing the upper side thereof are splashed upward from the ink splash prevention plate 9. Can be stopped, the impression cylinder 7
The end face 7b, the printing sheet w, the support shaft 7a of the impression cylinder 7, and the like can be prevented from being stained by the ink splash 5a.

[0024]

According to the gravure printing plate cylinder of the present invention, the ink is repelled as ink droplets 5a above the side end surface of the plate cylinder by the centrifugal force of the plate cylinder rotating at a high printing speed after being immersed in the ink. When raised, it is possible to prevent the side surfaces of the impression cylinder, the printing sheet and the spindle of the impression cylinder from being stained, and to prevent the printing sheet w from being stained. In addition to the gravure ink, a gravure printing plate cylinder is used. Can prevent contamination due to splashing of the coating liquid when applying adhesive or other resin liquids.This has a remarkable effect on labor saving in cleaning, cleaning and maintenance work of gravure printing equipment and its impression cylinder, and prevention of contamination of gravure printed matter. is there.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a gravure printing plate cylinder according to the present invention.

FIG. 2 is a side view of an embodiment of a gravure printing plate cylinder of the present invention.

FIG. 3 is a front view of another embodiment of the gravure printing plate cylinder of the present invention.

FIG. 4 is a side view of another embodiment of the gravure printing plate cylinder of the present invention.

FIG. 5 is a side view of a conventional gravure printing plate cylinder and a gravure printing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plate cylinder main body 1a ... Spindle 1b ... Side end surface 2 ... Plate cylinder outer peripheral surface 3 ... Ink cell 4 ... Ink tank 5 ... Gravure ink 5a ... Ink splash 5b ... Printing image 6 ... Doctor blade 7 ... Impression cylinder 7a ... Spindle 7b ...
Side end face 8: Convex ridge 9: Ink splash prevention plate A: Plate cylinder for gravure printing
w: printing sheet d: distance between the outer edge of the side end face and the outer edge of the convex ridge s: thickness
t ... height

Continuation of the front page (56) References Japanese Utility Model 1975-35704 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41F 13/11 B41F 31/00

Claims (2)

(57) [Claims] An end surface 1b on both sides of a cylindrical cylinder 1 for gravure printing.
Collision from the plate cylinder rotational center to the outside, on both sides from the end face 1b
Out of the impression cylinder 7 on both sides of the impression cylinder 7 facing the plate cylinder 1
A gravure printing plate cylinder provided with a ring-shaped ridge 8 protruding outward in the width direction . 2. A cylindrical cylinder 1 for gravure printing, both end surfaces 1b.
Outside the center of rotation of the plate cylinder, and projecting to both sides from the end face 1b.
Out of the impression cylinder 7 on both sides of the impression cylinder 7 facing the plate cylinder 1
A ring-shaped ridge 8 protruding outward in the width direction is provided.
The ink repellent facing the upper peripheral surface of the bank 8 at a predetermined interval.
Attach the splash prevention plate 9 to the gravure printing device body frame
A plate cylinder for gravure printing.