JP2002096445A - Printing plate installing apparatus and printing plate installing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing plate installing apparatus and its installing method to install the printing plate on a regulated position at high accuracy in a flexography to use a letterpress of a photosensitive resin and the like as a printing plate material. SOLUTION: The printing plate 4 is installed on the regulated position by having a reference board 3 with the same shaped and deep recess portion as a printing area portion at a corresponding position to the printing area portion, an elevating means 12 for a printing plate cylinder 2, a rack 6 to regulate a position to rotational direction of the printing plate cylinder 2 and the elevating means 12 for this rack 6, a gap adjusting means 11 to regulate a descending volume of the elevating means 12, a moving table 5 to move the reference board 3 in parallel, and a printing plate cylinder regulating means 7 to install the printing plate cylinder 2 on the regulated position toward top and bottom direction and toward right and left direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate surface mounting apparatus and method for mounting a printing plate surface at a fixed position with high accuracy in flexographic printing using a relief plate such as a photosensitive resin as a plate material.

[0002]

2. Description of the Related Art Flexographic printing using a relief plate of a photosensitive resin or the like as a printing plate has simple equipment and can perform plate making in a short time. However, it is difficult to employ a printing plate surface mounting position adjusting means such as an offset printing machine, and the sticking to the printing plate cylinder is performed using a double-sided tape having a cushioning property. Therefore, it is difficult to attach the printing plate surface to the fixed position of the printing plate cylinder. Particularly in multicolor printing, a good printed matter cannot be obtained unless the printing plate surface for each color is accurately attached.

[0003] In view of the above, the register mark, which manages the pattern portion of the printing plate surface, is projected by a half mirror onto a printing plate cylinder on which the printing plate surface is to be mounted, and the register mark and the register mark are aligned with the printing plate surface. Is equipped with a printing plate.

Further, as a method of improving the above method, a registration mark for examination is written at a predetermined position with a pen using a pen holder which can be shifted to a printing plate cylinder, and a printing plate surface is stuck on the basis of the registration mark ( Actual fairness 8-
1863).

[0005]

In a method of mounting a printing plate surface on a printing plate cylinder using a half mirror in a conventional printing plate surface pasting apparatus (Japanese Utility Model Publication No. 8-1863),
Since the registration marks displayed on the printing plate cylinder are visually checked, there is a difference depending on the viewing angle, and it is difficult to match the registration marks on all printing plate surfaces in multicolor printing.

Further, in a method of writing a register mark for registration at a predetermined position of a printing plate cylinder with a pen or the like and mounting the printing plate surface based on the register mark,
Since the printing plate surface is mounted on the printing plate cylinder using a cushion tape or the like, the writing of the register mark is performed on the double-sided tape having the adhesive cushion tape property, so the workability is very poor, and it is difficult to confirm. In addition, there is a problem that the sticking accuracy is lowered because the thickness is not uniform because a pen or the like is used.

In flexographic printing using a relief plate such as a photosensitive resin as a plate material, when the printing plate surface is stuck on the printing plate cylinder by the above-described method with reference to the register mark for registration, the elongation or sticking occurs due to uneven tension. However, there has been a problem that the pressure required for the printing becomes uneven and the height of the printing plate surface varies.

[0008] In flexographic printing using a relief plate such as a photosensitive resin as a plate material, a printing plate surface on which printed patterns are densely arranged is:
There is a problem that a uniform contact pressure cannot be obtained over the entire surface because only the convex portions come into contact with each other.

[0009]

SUMMARY OF THE INVENTION In flexographic printing using a relief plate such as a photosensitive resin as a plate material, a reference plate for fixing the plate material, elevating means attached to both ends of a frame supporting a printing plate cylinder, A rack mounted in parallel with the reference plate for controlling the position of the printing plate cylinder in the rotation direction, a raising and lowering means of the rack, a gap adjusting means for restricting a descending amount of the raising and lowering means, and By having a moving table for moving and the printing plate cylinder regulating means for installing the printing plate cylinder at predetermined positions in the vertical and horizontal directions, the plate surface can be mounted at a predetermined position. This is a printing plate surface mounting device that is characterized.

In flexographic printing using a relief plate of a photosensitive resin or the like as a printing plate, the reference plate is used for setting the printing surface of the printing plate surface and forming a convex image portion formed on the printing plate surface and a lower image portion. A printing plate surface mounting apparatus characterized in that it has the same shape and depth as the image portion at a position corresponding to the image portion in order to make the contact pressure due to the unevenness generated by the portion uniform.

[0011] The reference plate has a convex shape of the printing pattern expressed on the printing plate surface and a concave shape of interest, and the printing pattern is printed on the printing paper with high precision position management. A printing plate surface mounting apparatus having a ruled line for installation at a predetermined position.

A printing plate surface mounting apparatus characterized in that by providing one or more reference plates, one or more printing plates can be simultaneously attached to the printing plate surface.

[0013] The printing plate surface mounting, wherein the lifting means comprises an air cylinder for raising and lowering the printing plate cylinder, and a stopper for maintaining the printing plate cylinder at a constant contact pressure with the printing plate surface. Device.

In flexographic printing using a relief plate of a photosensitive resin or the like as a printing plate, the printing pattern has a convex shape and a target concave shape expressed on the printing plate, and the printing pattern has high-precision position management. On the reference plate having a ruled line for setting the printing plate surface at a predetermined position in order to be printed on printing paper, the printing plate surface is installed such that the convex portion of the printing plate surface matches the concave portion, and the printing plate surface A double-sided tape with a cushioning property for fixing the printing plate cylinder, and a cam mechanism for fixing the top and bottom left and right directions and the printing plate cylinder installed on the cam mechanism are mounted on the rack and the printing plate cylinder by the elevating means. The gears are meshed with each other at the regulated position, the printing plate surface set on the reference plate is adjusted to have a constant contact pressure, and the reference plate is translated by rotating a handle to print the printing plate surface. Plate cylinder A printing plate surface mounting method characterized in that mounted with high accuracy.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a printing plate surface mounting apparatus and a mounting method for mounting a printing plate surface at a fixed position with high accuracy in flexographic printing using a relief plate such as a photosensitive resin as a plate material.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these examples.

Hereinafter, a relief plate for flexographic printing prepared using a photosensitive resin or the like as a plate material is referred to as a printing plate surface.

FIG. 1 is a view showing a case where the printing plate cylinder 2 is mounted on the printing plate surface mounting device 1, and a rotation direction and surface length direction regulating cam 8 of the printing plate cylinder 1 is fixed to the printing plate cylinder regulating means 7. I do. At this time, the gap between the printing plate cylinder 2 and the reference plate 3 is adjusted using the gap adjusters 11 installed at both ends of the printing plate cylinder 2.
When the printing plate cylinder 2 is lowered by the air cylinder 12 by the gap adjusting bolt 10, the provision of the stopper 14 allows the printing plate cylinder 2 and the printing plate surface 4 to maintain a constant contact pressure.

FIG. 2 shows a printing plate surface 4 for flexographic printing.
Mark 1 for managing the position of the print pattern 16
It takes five. Further, the reference pattern 3 shown in FIG. 3 has a printing pattern 19 and a registration mark using a NC engraving machine at positions corresponding to the convex printing pattern 16 and the registration mark 15 for managing the position of the printing pattern on the printing plate surface 4. 17 is processed into a concave shape, and further, a mounting hole 18 for mounting the reference board 3 on the moving table 5 is processed.

In the present embodiment, the case of one-color printing is shown, but in the case of multi-color printing, the register mark 15 processed in the concave shape serves as a reference for each plate surface.

FIG. 4 is a view in which the reference plate 3 is mounted on the moving table 5. The moving table 5 and the reference plate 3 are both connected by the handle 13 by being attached to the mounting holes 18 of the reference plate 3 with hexagon bolts or the like. Translate in parallel. In the present embodiment, two reference boards are attached, but the number is not particularly limited as long as the reference board can be attached to the moving table 5.

FIG. 5 is a view in which the reference plate 3 is mounted on the moving table 5 by the above method, and then the printing plate surface 4 is set on the reference plate 3 processed by the above method. At this time, the convex portion 1 of the printing plate surface 4 corresponding to the concave printed pattern portion 19
6, the position where the printing plate surface 4 is to be attached to the printing plate cylinder 2 is determined. FIG. 6 is an enlarged cross-sectional view showing a state where the convex portion of the printing plate surface 3 is fitted into the concave portion of the reference plate 2.

FIG. 7 is a view in which a double-sided tape 20 having a cushioning property for attaching the printing plate surface 4 to the printing plate cylinder 2 is attached. At this time, a double-sided tape 20 having a cushioning property with a width that can be mounted over the entire surface of the printing plate to be mounted on the printing plate cylinder 2 is prepared.
8, a double-sided tape 20 having a cushioning property is supported by a tape bar 23 with reference to the score line 22 in the width direction and the printing plate cylinder 2 while rotating the printing plate cylinder 2 by hand. Affix to.

When the printing plate surface 4 is installed with a double-sided tape 20 having a cushion tape property attached to the printing plate cylinder 2, the gap between the printing plate cylinder 2 and the reference plate 3 is adjusted as shown in FIG. Gap adjusting bolts 10 installed at both ends of
Performed by

The gap adjusters 11 installed at both ends of the printing plate cylinder 2 shown in FIG. 9 use the reference plate 3, the printing plate surface 4 and the cushion based on the time when the moving table 5 and the printing plate cylinder 2 come into contact with each other. The thickness of the double-sided tape 20 having the property is adjusted by the gap adjusting bolt 10. Even when the diameter of the printing plate cylinder 2, the thickness of the double-sided tape 20 having cushioning properties, and the thickness of the printing plate surface 4 are different, the thickness can be adjusted by adjusting the gap adjusting bolt 10.

The moving table is slid by the handle 13 until the leading end of the printing plate surface 4 comes into contact with the printing plate cylinder. The release gear of the double-sided tape 20 having a cushioning property is peeled off, and the printing plate cylinder 2 to which the double-sided tape 20 having the cushioning property is adhered is lowered by the air cylinder 12 to be attached to the rack 6 and the printing plate cylinder 2. 9 is engaged with the printing plate cylinder 2 as shown in FIG.
To regulate the position in the rotation direction. The slide amount of the moving table is a predetermined position where the eye mark 24 of the transmission gear 9 of the printing plate cylinder 2 and the eye mark 25 of the rack 6 match,
When the position of the printing plate cylinder 2 in the rotation direction is determined, the rack 6 is lowered by the air cylinder 12 to release the engagement with the transmission gear 9 attached to the printing plate cylinder 2.

By moving the moving table 5 in parallel while rotating the handle 13 shown in FIG. 11, the printing plate cylinder 2 rotates, and the printing plate surface 4 and the printing plate cylinder 2 are in contact with each other. Can be attached to the printing plate cylinder 2 to which the double-sided tape 20 having the cushioning property is sequentially attached from the part.

[0028]

According to the present invention, since the printing plate surface is sequentially pasted from the front end portion using the concaved reference plate, the printing plate surface is not twisted or stretched, does not require the skill of an operator, and requires much time for mounting work. Anyone can easily attach the printing plate surface to a predetermined position without the need for a printing plate.

By using a reference plate having a concave shape at a position opposed to a convex print pattern, a printing plate surface can be stuck with a constant contact pressure amount.

Since the reference plate has ruled lines for installation at predetermined positions, the printing plate surface can be easily and accurately attached by setting the printing plate surface.

Since the registration mark is required on the concave reference plate, the printing accuracy of each plate surface in multicolor printing can be easily maintained.

[Brief description of the drawings]

FIG. 1 is a front view of a printing plate cylinder and a printing plate surface mounting device.

FIG. 2 is a diagram illustrating an example of a printing pattern on a printing plate surface and a shape of a register mark that manages the printing pattern.

FIG. 3 is a diagram showing an example of a print pattern of a reference board and a shape of a register mark which manages the print pattern.

FIG. 4 is a diagram in which a reference board is set on a moving table.

FIG. 5 is a diagram for setting a printing plate surface on a reference board.

FIG. 6 is an enlarged cross-sectional view showing a state where a concave portion of the reference plate and a convex portion of the printing plate surface are fitted.

FIG. 7 is a diagram in which a double-sided tape having a cushion tape property is attached to a printing plate cylinder.

FIG. 8 is a diagram in which a double-sided tape having a cushioning property is attached to a printing plate cylinder.

FIG. 9 is a diagram illustrating a front view of a printing plate surface mounting device on which a printing plate cylinder is mounted.

FIG. 10 is a diagram showing a transmission gear and a rack.

FIG. 11 is a diagram illustrating a method of attaching a printing plate surface.

[Explanation of symbols]

 1 printing plate surface sticking device 2 printing plate cylinder 3 reference plate 4 printing plate surface 5 moving table 6 rack 7 printing plate cylinder regulating means 8 rotation direction and surface length direction regulating cam 9 conduction gear 10 gap adjusting bolt 11 gap adjusting machine 12 air cylinder 13 Handle 14 Stopper 15 Registration mark that controls the printing pattern of the printing plate 16 Printing pattern of the printing plate 17 Registration mark that controls the printing pattern of the reference plate 18 Mounting hole 19 Printing pattern of the reference plate 20 Cushioning property Double-sided tape 21 Marking line in flow direction 22 Marking line in width direction 23 Tape bar 24 Conduction gear eye mark 25 Rack eye mark

Claims (6)

[Claims] In flexographic printing using a relief plate such as a photosensitive resin as a plate material, a reference plate for fixing the plate material, elevating means attached to both ends of a frame supporting a printing plate cylinder, and the reference plate. A rack for regulating the position of the printing plate cylinder in the rotation direction, which is mounted in parallel, a lifting means for the rack, a gap adjusting means for regulating a descending amount of the lifting means, and a parallel movement for the reference plate. A moving table, by having the printing plate cylinder restricting means for installing the printing plate cylinder at a predetermined position in the vertical and horizontal directions,
A printing plate mounting apparatus characterized in that a plate can be mounted at a predetermined position. 2. The flexographic printing method according to claim 1, wherein the reference plate includes a convex image portion formed on the printing plate surface when the printing surface of the printing plate surface is set in flexographic printing using a relief plate such as a photosensitive resin as a plate material. 2. The method according to claim 1, further comprising a concave portion having a shape and a depth similar to that of the image portion at a position corresponding to the image portion in order to equalize a contact pressure due to unevenness caused by a low non-image portion. Printing plate surface mounting device. 3. The method according to claim 1, wherein the reference plate has a convex shape of the print pattern expressed on the plate material and a concave shape to be a target, and the print pattern is printed on printing paper with high-accuracy position management. The printing plate surface mounting apparatus according to claim 1, further comprising a ruled line for setting the printing plate surface at a predetermined position. 4. The printing plate surface mounting apparatus according to claim 1, wherein one or more printing plates are provided at the same time by providing one or more reference plates. . 5. The apparatus according to claim 1, wherein said lifting means includes an air cylinder for lifting and lowering the printing plate cylinder, and a stopper for maintaining a constant contact pressure between the printing plate cylinder and the plate material. The printing plate surface mounting device according to claim 1. 6. A flexographic printing method using a relief plate of a photosensitive resin or the like as a plate material, wherein the printing pattern has a convex shape and a target concave shape represented by the plate material, and the printed pattern has high precision. On the reference plate having a ruled line for setting the printing plate surface at a predetermined position to be printed on printing paper in position management, installed so that the convex portion of the printing plate surface matches the concave portion, A cushioning double-sided tape for fixing the printing plate surface is applied, and a cam mechanism for fixing the top and bottom left and right directions and the printing plate cylinder installed on the cam mechanism are attached to the rack and the printing plate cylinder by the elevating means. Meshed with the conductive gear at the regulation position, adjusted so as to have a constant contact pressure with the printing plate surface installed on the reference plate, and the reference plate was moved in parallel by turning a handle to move the printing plate surface. The printing plate cylinder Printing plate surface mounting method characterized in that mounted with high accuracy.