JP2008023757A - Nip width checking system in ink supply and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and a method which enable easy and simple checking of a nip width. <P>SOLUTION: An ink roller control type printing control apparatus is equipped with a nip width checking instruction accepting means which accepts an input of a nip width checking instruction, a plate cylinder stopping instruction means which receives plate cylinder phase angle information and issues a plate cylinder stopping instruction when this information accords with prescribed plate cylinder phase angle information, a roller contact instruction means which issues a form roller contact instruction and a printing instruction means which issues a printing instruction. A printing unit is equipped with a plate cylinder phase angle information transmission means which transmits plate cylinder phase angle information, a plate cylinder stopping means which accepts the plate cylinder stopping instruction and stops a plate cylinder, a roller contact means which accepts the form roller contact instruction and brings a form roller into contact with the plate cylinder for a prescribed time and a printing means which accepts the printing instruction and prints the ink put on a printing plate of the plate cylinder on a printing medium. The nip width checking system is constituted by connecting these apparatus and unit together. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a system for checking a nip width by an ink form roller that supplies ink to a plate cylinder in a printing apparatus, and a method thereof.

Conventionally, by controlling the nip width set between the ink form roller and the plate cylinder, the ink supply amount (= transfer amount) from the ink form roller to the plate cylinder is controlled.

For example, in Patent Document 1, even if a printing cylinder or printing cylinder is attached / detached from a printing unit, an appropriate nip width is set without changing the nip width set between the ink form roller and the printing cylinder. A holding technique is disclosed. (Prior art 1)
Further, in Patent Document 2, the nip width set between the ink form roller and the plate cylinder is kept constant by adjusting the ink supply amount to the ink form roller in response to the change in ink viscosity during printing operation. The technique to hold is disclosed. (Prior art 2)
Japanese Patent No. 2885847 (5 pages, FIGS. 5 and 6) Japanese Patent No. 3664242 (12 pages, FIGS. 1, 3 and 5)

By the way, in the prior art 1 and the prior art 2, in order to set an appropriate nip width, the nip width of the plate cylinder of each printing unit was measured, and the nip width adjustment work was performed for each. For this reason, there has been a problem that it takes a lot of time for measurement work and adjustment work. Furthermore, this measurement work and adjustment work have the disadvantage of placing a physical burden on the printing press operator.

The present invention has been made in view of such a conventional technique, and an object of the present invention is to provide a system and a method for easily and simply confirming the nip width.

The present invention solves the above problems by the following means. That is, the invention of claim 1 is a nip width confirmation system in which an ink roller control type print control device and a printing unit are connected to each other, wherein the ink roller control type print control device receives a nip width confirmation instruction. Nip width confirmation instruction receiving means for receiving input, plate cylinder phase angle information receiving means for receiving plate cylinder phase angle information from the printing unit, and the received plate cylinder phase angle information is a predetermined plate cylinder phase angle information. If they match, a printing cylinder stop instruction means is issued to the printing unit, a printing cylinder stop instruction means to be issued, an inking roller adhesion instruction is issued to the printing unit, a roller adhesion instruction means to be issued, and a printing instruction is issued to the printing unit A printing apparatus, wherein the printing unit transmits plate cylinder phase angle information to an ink roller control type printing control apparatus. From the angle information transmission means and the ink roller control type printing control device, from the plate cylinder stop means for receiving a plate cylinder stop instruction and stopping the plate cylinder at a predetermined phase angle, and the ink roller control type printing control device, Received the ink form roller adhesion instruction, and received the print instruction from the roller adhering means for bringing the ink form roller into contact with the plate cylinder for a predetermined time and the ink roller control type printing control device, and was attached to the printing plate of the plate cylinder. A nip width confirmation system comprising: a printing unit that prints ink on a printing medium.

Here, an ink transfer region called a nip mark can be formed by contacting the ink form roller with the plate cylinder for a predetermined time in the printing unit.
Therefore, by stopping the plate cylinder of each printing unit at a predetermined phase angle and forming a nip mark, each nip mark can be printed on a print medium at a position where it does not overlap. . The printing operator measures the nip width from the nip mark.

According to a second aspect of the present invention, there is provided a nip width confirmation instruction receiving step for receiving an input of a nip width confirmation instruction, a plate cylinder phase angle information receiving step for receiving plate cylinder phase angle information, and the received plate cylinder phase angle information. When the plate cylinder phase angle information coincides with the predetermined plate cylinder phase angle information, a printing cylinder stop instruction is issued to the printing unit, a printing cylinder stop instruction step is issued, an ink form roller adhesion instruction is issued, a roller adhesion instruction step is issued, and an ink form roller adhesion instruction is issued A roller adhering step for adhering the ink form roller to the printing plate of the plate cylinder, a printing instruction step for issuing a printing instruction, and a printing instruction for receiving the printing instruction for a predetermined time. And a printing step of printing the ink on a printing medium.

The invention of claim 3 is a computer program that causes the computer to operate as the nip width confirmation system according to claim 1 by being incorporated in the computer.

A fourth aspect of the present invention is a computer-readable recording medium on which the computer program according to the third aspect is recorded.

According to the present invention, it is possible to measure the nip width of the plate cylinder of each printing unit without requiring time. In addition, the nip width of the plate cylinder of each printing unit can be measured without imposing an excessive work burden on the body.

(Example)
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a diagram for explaining the outline of the nip width confirmation system 1. The nip width confirmation system 1 is configured by connecting a printing unit 100 and an ink roller control type printing control apparatus 300.

The printing unit 100 includes at least an ink form roller 101, a plate cylinder 102, and a plate cylinder phase angle detector 107. The printing unit 100 prints ink on the printing medium 500.

The printing press operator 900 controls the printing press constituted by the printing unit 100 using the ink roller control type printing control apparatus 300.

FIG. 2 illustrates a rough processing flow of the nip width confirmation system 1.

The ink roller control type printing control apparatus 300 receives a nip width confirmation instruction input by the printing press operator 900 (FIG. 2 (1)).

The printing unit 100 transmits the plate cylinder phase angle information to the ink roller control type printing control apparatus 300 ((2)).
The ink roller control type printing control apparatus 300 receives the plate cylinder phase angle information from the printing unit 100 ((3)).

When the received plate cylinder phase angle information matches the predetermined plate cylinder phase angle information, the ink roller control type printing control device 300 issues a plate cylinder stop instruction to the printing unit 100 ((4)).

The printing unit 100 receives a plate cylinder stop instruction from the ink roller control type printing control apparatus 300, and stops the plate cylinder 102 at a predetermined phase angle ((5)).

The ink roller control type printing control apparatus 300 issues an ink form roller adhesion instruction to the printing unit 100 ((11)).

The printing unit 100 receives an ink form roller adhesion instruction from the ink roller control type print control apparatus 300, contacts the ink form roller 101 with the printing plate of the plate cylinder 102 for a predetermined time, applies ink, and applies a nip mark. (Same as (12)).

The ink roller control type printing control apparatus 300 receives the ink form roller adhesion report from all the printing units 100 and issues a printing instruction to the printing unit 100 ((21)).

The printing unit 100 receives the printing instruction and prints the nip mark formed on the printing plate of the plate cylinder 102 on the printing medium 500 ((22)).

Thus, by stopping the plate cylinder at a predetermined phase angle in each printing unit, it is possible to prevent the nip mark positions printed on the printing medium 500 from overlapping.

Note that the printing press operator 900 measures the nip width of the nip mark of the print medium 500, thereby comparing with the conventional measurement method (= method of measuring the nip width on the plate cylinder of each printing unit). There are advantages that the measurement work time can be reduced and the burden of the measurement work is reduced.

FIG. 3 is a detailed configuration diagram of the nip width confirmation system 1. The nip width confirmation system 1 is configured by connecting a printing unit 100 and an ink roller control type printing control apparatus 300.

The ink roller control type printing control apparatus 300 includes a nip width confirmation instruction receiving unit 310, a plate cylinder phase angle information receiving unit 370, a plate cylinder stop instruction unit 320, a roller adhesion instruction unit 340, a print instruction unit 360, Is provided.

The nip width confirmation instruction accepting unit 310 accepts an input of a nip width confirmation instruction.

The plate cylinder phase angle information receiving unit 370 receives plate cylinder phase angle information from the printing unit 100. When the received plate cylinder phase angle information matches the predetermined plate cylinder phase angle information, the plate cylinder stop instruction unit 320 issues a plate cylinder stop instruction to the printing unit 100.

The roller adhesion instructing unit 340 issues an ink form roller adhesion instruction to the printing unit 100.

The print instruction unit 360 issues a print instruction to the printing unit 100.

The printing unit 100 includes a plate cylinder phase angle information transmission unit 170, a plate cylinder stop unit 120, a roller bonding unit 140, and a printing unit 160.

The plate cylinder phase angle information transmitting unit 170 transmits the plate cylinder phase angle information to the ink roller control type printing control apparatus 300.

The plate cylinder stopping means 120 receives a plate cylinder stop instruction from the ink roller control type printing control apparatus 300 and stops the plate cylinder 102 at a predetermined phase angle.

The roller adhering means 140 receives an ink form roller adhesion instruction, contacts the ink form roller 101 with the printing plate of the plate cylinder 102 for a predetermined time, and transfers ink.

The printing unit 160 receives a printing instruction and prints the ink applied to the printing plate of the plate cylinder 102 on the printing medium 500.

Nip width confirmation instruction receiving means 310, plate cylinder stop instruction means 320, roller adhesion instruction means 340, plate cylinder phase angle information receiving means 370, print instruction means 360, plate cylinder stop means 120, roller adhesion means 140, plate cylinder phase angle information transmission means 170, and printing means 160 are computer programs.

4 and 5 are explanatory diagrams of nip mark formation. FIG. 4 is an explanatory diagram of the ink form roller and the plate cylinder. FIG. 4 illustrates a printing unit 100 including four ink form rollers 101.

A printing plate 102 a is fixed to the plate cylinder 102. In the initial state, each ink form roller 101 is in a state of being separated from the plate cylinder 102 (FIG. 4 (1)).

Each ink form roller 101 contacts the printing plate 102a of the plate cylinder 102 for a predetermined time in accordance with an instruction from the ink roller control type printing control apparatus 300 (FIG. 4 (2)). Here, as a result of the four ink form rollers 101 coming into contact with the printing plate 102a, four nip marks are formed.

FIG. 5 is an example of a nip mark of the printing plate 102a. FIG. 5 illustrates the nip mark described in FIG. The four nip marks on the printing plate 102a were formed by the four ink form rollers 101 of the printing unit 100 contacting the printing plate 102a.

The measured values of the distance between the four illustrated nip marks are as follows: the distance between the nip mark of the # 1 roller and the nip mark of the # 2 roller is 72 mm, and the nip mark of the # 2 roller and # 3 The distance between the nip mark of the roller is 79 mm, the distance between the nip mark of the # 3 roller and the nip mark of the # 4 roller is 74 mm, and the nip mark of the # 4 roller and the printing plate 102a The distance from the end is about 50 mm.

FIG. 6 is an example of a nip mark printed on the print medium 500. FIG. 6 shows an example in which the nip mark described in FIG. 5 is printed on the maximum width printing paper 500 that can be printed by the Kikuzen printing press.

Here, by using printing paper with the maximum width that can be printed by the printing apparatus, the interval value of the nip mark with the maximum width can be measured, and the measurement accuracy can be increased.

FIG. 7 is an example of a print medium 500 on which nip marks of four printing units are printed. FIG. 7 illustrates a printing medium 500 on which printing cylinders 102 of four printing units are formed by forming nip marks at a phase angle shifted by 19 mm from each other.

FIG. 8 is an example of a print medium 500 having a spotted nip width. FIG. 8 illustrates a nip mark in which the right and left nip balance of the # 4 roller of the fourth printing unit is out of order (one-effect) (FIG. 8 (1)).

Further, a nip mark in which the # 3 roller of the third printing unit is not attached to the plate cylinder is illustrated ((2)).

Further, a nip mark in which the nip pressure of the # 1 roller of the fourth printing unit is too low is illustrated ((3)).

(Reference) An example in which a nip mark is printed when the plate cylinder is stopped at a normal phase angle without stopping at a predetermined phase angle will be described. FIG. 9 is an example of a nip mark printed at a normal printing phase angle. FIG. 9 illustrates a print medium 500 on which nip marks are printed while the phase angles of the four printing units remain the normal printing phase angles. The four nip marks of each printing unit are printed substantially overlapping each other.

As described above in detail, according to the present invention, the nip width of the plate cylinder of each printing unit can be measured without requiring time. Further, the nip width of the plate cylinder of each printing unit can be measured without imposing an excessive work load on the body.

Outline of nip width confirmation system 1 Rough process flow of nip width confirmation system 1 Detailed configuration diagram of nip width confirmation system 1 Explanatory drawing of the ink form roller 101 and the plate cylinder 102 Example of nip on printing plate 102a by ink form roller Example of print media printed on the nip of one printing unit Example of print media that prints the nip of four printing units Explanatory drawing of the printing medium 500 with a spot in the printed nip (Reference) Example of print media on which the nip of the printing plate of the four printing units is printed

Explanation of symbols

1 Nip Width Confirmation System 100 Printing Unit 101 Ink Forming Roller 102 Plate Cylinder 102a Printing Plate 107 Plate Cylinder Phase Angle Detector 120 Plate Cylinder Stopping Unit 140 Roller Adhering Unit 170 Plate Cylinder Phase Angle Information Transmitting Unit 160 Printing Unit 300 Ink Roller Control Type Printing control device 310 Nip width confirmation instruction receiving means 320 Plate cylinder stop instruction means 340 Roller adhesion instruction means 370 Plate cylinder phase angle information receiving means 360 Print instruction means 500 Print medium 900 Printing press operator

Claims (4)

In a nip width confirmation system configured by connecting an ink roller control type printing control device and a printing unit,
The ink roller control type printing control device is:
A nip width confirmation instruction receiving means for receiving an input of a nip width confirmation instruction;
Plate cylinder phase angle information receiving means for receiving plate cylinder phase angle information from the printing unit;
If the received plate cylinder phase angle information matches the predetermined plate cylinder phase angle information, a plate cylinder stop instruction means for issuing a plate cylinder stop instruction to the printing unit;
A roller adhesion instruction means for issuing an ink form roller adhesion instruction to the printing unit;
A print instruction means for issuing a print instruction to the printing unit;
A control device comprising:
The printing unit includes:
Plate cylinder phase angle information transmitting means for transmitting plate cylinder phase angle information to the ink roller control type printing control device;
Plate cylinder stop means for receiving a plate cylinder stop instruction from the ink roller control type printing control device and stopping the plate cylinder at a predetermined phase angle;
A roller bonding means for receiving an ink form roller adhesion instruction from the ink roller control type printing control device and contacting the ink form roller with the plate cylinder for a predetermined time;
A printing unit that receives a printing instruction from the ink roller control type printing control device and prints the ink on the printing plate of the plate cylinder on the printing medium;
A printing unit comprising:
A nip width confirmation system. A nip width confirmation instruction receiving step for receiving an input of a nip width confirmation instruction;
Plate cylinder phase angle information receiving step for receiving plate cylinder phase angle information;
If the received plate cylinder phase angle information matches the predetermined plate cylinder phase angle information, a plate cylinder stop instruction step for issuing a plate cylinder stop instruction to the printing unit;
A roller adhesion instruction step for issuing an ink form roller adhesion instruction; and
A roller adhering step for accepting an ink form roller adhesion instruction and adhering the ink form roller to the printing plate of the plate cylinder for a predetermined time;
A print instruction step for issuing a print instruction;
A printing step for receiving a printing instruction and printing the ink applied to the printing plate of the plate cylinder on a printing medium;
A method for confirming the nip width, characterized in that the method includes a procedure including: The computer program which makes a computer operate | move as a nip width confirmation system of Claim 1 by incorporating in a computer. The computer-readable recording medium which recorded the computer program of Claim 3.

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