JPS63299934A - Supply ink amount optimizing system of corrugated board printing press - Google Patents

Abstract

PURPOSE:To perform printing while always keeping the amount of ink optimum, by storing the supply amount of ink in a control apparatus and reading the supply amount of the ink utilized the last time each time when a predetermined number of sheets are printed to perform fine adjustment and newly storing the supply amount of ink in the control apparatus after the finish of printing. CONSTITUTION:When the same printing pattern as the last time is printed on a corrugated cardboard sheet, the data of the supply amount of ink to each region used the last time is read from the predetermined memory address of a floppy disk 9 or magnetic bubble memory 10 to be displayed on a display apparatus 11 in order to be subjected to the next utilization. The next printing condition is finely adjusted with respect to the previous printing condition and the optimum supply amount of the ink is set. After the finish of printing, the supply amount of the ink to each region altered by fine adjustment is newly stored in the predetermined floppy disk 9 or magnetic bubble memory 10 and prepared so as to be usable when the same printing pattern is printed next.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a system for optimizing the amount of ink supplied to a corrugated board printing machine.

``Prior art'' This type of conventional corrugated board printing machine was published in Japanese Patent Application Laid-open No. 56-139.
Those described in Japanese Utility Model Application Publication No. 964 and Japanese Utility Model Application Publication No. 57-13243 are known. In other words, in any corrugated board printing machine, the ink supply nozzle reciprocates in the axial direction of the printing cylinder on which the printing plate is attached, and when it reaches the position corresponding to the area to be printed on the corrugated board sheet, the ink supply nozzle is turned off. Oil-based ink is ejected from the nozzle in an amount that is consumed depending on various printing conditions such as differences in printing patterns such as pictures. The control device for moving the ink supply nozzle to a specified area of the printing cylinder and ejecting oil-based ink was developed by the applicant in Japanese Patent Application Laid-Open No. 57-2759.
This has already been proposed in the Publication No.

``Problems to be Solved by the Invention'' However, conventionally, each time a predetermined number of ordered sheets are printed, the amount of ink required is not only set in advance according to the aspect of the print pattern such as a picture, but also the set value In addition, fine adjustments must be made in accordance with various conditions such as the ambient temperature and humidity, differences in the properties of the oil-based ink, and paper quality, resulting in extremely complicated work. Furthermore, setting and fine-tuning the amount of ink described above relies on the intuition of workers, which not only requires years of skill, but also requires many test prints when fine-tuning, resulting in a lot of waste and work. This was a cause of wasted work time as well as efficiency.

Therefore, in view of the above circumstances, the present invention finely adjusts the ink supply amount of each area of the printing cylinder used last time according to printing conditions such as ambient temperature when printing a predetermined number of ordered sheets next time. During printing, the ink supply amount for each area that has been changed through fine adjustments is stored in the control device and used for the next printing, which simplifies the setting of the ink supply amount and shortens the time for test printing. It is an object of the present invention to provide a system for optimizing the amount of ink supplied to a corrugated board printing machine, which not only enables printing with the optimum amount of ink at all times but also improves work efficiency.

``Means to be Solved by the Invention'' In order to achieve the above-mentioned object, the present invention provides a corrugated board printing machine that supplies an arbitrary amount of ink to an arbitrary position in the axial direction of a printing cylinder equipped with a printing plate. A control device that controls the amount of ink supplied is connected to the cardboard sheet I of the printing cylinder.
・The ink supply amount corresponding to the area to be printed is stored in memory, and each time a predetermined number of ordered sheets are printed, the ink supply amount for each area used last time is read out, and the ink supply amount corresponding to the printing conditions such as ambient temperature is read out. This system is characterized by an optimization method for the amount of ink supplied to a corrugated board printing machine, in which the amount of ink supplied to each area changed by the fine adjustment is newly stored in the control device after printing is completed. be.

"Function" In the above means, the present invention stores in advance the required amount of ink corresponding to a certain printing pattern in the control device, and each time a predetermined number of ordered sheets is printed, the amount of ink is Then, after printing is completed, the ink supply amount whose content has been changed due to the fine adjustment is newly stored in the control device and used for the next printing of the same content.

“Example” An example of the method for optimizing the amount of ink supplied to a corrugated board printing machine according to the present invention will be described below with reference to the drawings. First, as shown in FIG. 1, in a corrugated board printing machine, a printing cylinder 1 on which a printing plate is mounted is divided into 12 equal areas, and 12 areas are assumed. As is well known, the printing cylinder 1 has an ink supply nozzle 2
The oil-based ink ejected from the ink is transferred via the kneading mechanism 30. The ink supply nozzle 2 reciprocates along the axial direction of the printing cylinder 1, and its reciprocation and the amount of ink discharged are controlled by a control device 3 shown in FIG.

The control device 3 includes a central processing unit CPU, an input/output control device E
A main processing section 4 consisting of an I10, a graphic display processing device GDC, etc., and an electromagnetic valve that controls driving of a motor 5 for reciprocating the ink supply nozzle 2, and opens and closes to discharge ink from the ink supply nozzle 2. The drive control unit 7 controls the operation of the drive control unit 6. The central processing unit CPU can input various information from the keyboard 8, and the central processing unit CPU
Various information inputted and processed can be stored in a floppy disk 9 or a magnetic bubble memory 10. Information in the central processing unit CPU is subjected to graphic processing by a graphic display device GDC so that it can be displayed on the display device 11. The ink supply nozzle 2 is configured so that a monitor device 12 consisting of a light emitting diode displays the movement position and the opening/closing state of the electromagnetic valve 6, that is, the ink ejection state.

In addition, FIG. 2 also shows the operation of the control processing unit 13 in a series of processing steps from printing on a corrugated cardboard sheet to forming a corrugated cardboard box by applying so-called ruled line processing and slot processing to stocking it in a stocker. It is a device that can be controlled via the communication processing unit 14, and the status of each processing machine M can be communicated via the communication processing unit 14. The control processing unit 13 is configured to exchange information with an external office computer 27 and to control operations upon receiving instructions from the office computer 27. It can be printed out using a printer 28. Further, in FIG. 2, 15 is a power switch, 16 is a power-on sequence circuit, 17 is a noise filter, 18 is a breaker, 19 is a power supply circuit, and 20 is an ink supply nozzle 2.
This is a warning lamp when an abnormality occurs in the operation.

Then, the corrugated cardboard sheet 21 is fed into the corrugated board printing machine so that the center OI of the width in the feeding direction coincides with the center in the axial direction of the printing cylinder 1, that is, the center 02 of the area divided into 12 equal parts of the printing cylinder 1. It has become. and,
On the display device 11, as shown in FIG.
The center 01 of 2, that is, the center of the width of the corrugated cardboard sheet 21 in the feeding direction, is drawn so as to coincide with the position 02 that should be the center of the printing cylinder 1 in the axial direction. Such depiction is performed by the central processing unit C via the input/output control unit I10 on the keyboard 8.
The image is input to the PU, further subjected to image processing by the graphic display processing device GDC, and displayed on the display device 11. In the line drawing 22 indicating the width orthogonal to the feeding direction of the corrugated board sheet 21, the processing positions of the ruled lines that will become folds when forming the box are also indicated as index lines. The space between -3 and this index line corresponds to each panel unit 22a to 22d. As shown in FIG. 3, the area display section 23 indicates an area obtained by dividing the printing cylinder 1 in the axial direction into 12 equal parts in the first corrugated board printing machine that prints the first color. The first corrugated board printing machine and the second corrugated board printing machine are connected to each other. and operate it.

Each area display section 23,24 is designated as areas ■ to ■ on the left and right with the center 0□ as a boundary, and each center 0□ is arranged on a straight line with the center O7 of the line drawing 22. Above each region ■ to Display as a bar graph. The amount of ink in each ink amount display section 25, 26 can be input to the central processing unit cpu using the keyboard 8 in correspondence with each area ■ to ■.
is displayed on the display device 11 via the graph ink display processing device GDC. Therefore, the amount of ink required for each of the areas (1) to (2) of each printing cylinder 1 can be determined in correspondence with the position in the width direction of the corrugated paperboard sheet 21, that is, the printing position. The central processing unit CPU stores each information about the ink supply areas (■ to ■), the ink supply amount, and the line drawing 22 of the cardboard sheet 21.
Floppy disk 9 or magnetic bubble memory 1
The drive controller 7 controls the drive of the motor 5 to move the ink supply nozzle 2 in the axial direction of the printing cylinder 1, and controls the opening and closing of the electromagnetic valve 6 to supply a predetermined amount of ink. Let it spit out.

Next, when printing a print pattern such as the same picture as the previous time on the corrugated board sheet 21, the data of the ink supply amount for each area ■ to ■ used last time is stored on the floppy disk 9 or the magnetic bubble memory 10. It is read from a predetermined storage address and then displayed on the display device 11 as shown in FIG. There may be a discrepancy in the printing conditions for printing.In other words, there may be differences between the previous printing and the next printing due to differences in ambient temperature, humidity, paper quality, moisture content of the paper, and even the properties of the oil-based ink. The condition changes slightly.In order to correct such changes in the printing condition, while making trial prints or actual printing of about 2 to 3 sheets, each area of the ink amount display section 25 and 26 is changed using the keyboard 8 shown in FIG. Fine adjustment is made by changing the values of ■~■, thereby setting the optimal supply ink amount for the next printing conditions.After printing is completed, the supply of each area ■~■ changed by the above fine adjustment is done. The amount of ink is newly stored in a predetermined storage address of the floppy disk 9 or the magnetic bubble memory 10, so that it can be used when printing the same print pattern next time.

On the other hand, when printing on corrugated cardboard sheets (21), the same or W44Q pattern may be repeatedly printed for a predetermined number of sheets, so multiple types of patterns, etc., to be printed may be printed. In accordance with this assumption, as shown in FIGS. 4 to 6, the ink display section 25
．． A plurality of simple patterns a to c representing the amount of ink supplied in 26 by height differences for each panel unit 22a to 22d are set and stored in a predetermined storage address of the floppy disk 9 or the magnetic bubble memo January 0. I'll keep it. When printing, select from the floppy disk 9 or the magnetic bubble memory 10 one of the supply ink amount patterns a''-c shown in FIGS. 4 to 6 that corresponds to the printing pattern such as a picture. It is read out and displayed on the display device 11. In this print control format as well, as in the above case, even if the print pattern is the same, the previous printing conditions and the next printing conditions will slightly change, so before printing While performing trial printing or actual printing about 2 to 3 times, fine adjustment is made using the keyboard 8 of the supplied ink amount values of the patterns a to C used last time to correspond to the next printing conditions.

The patterns a to C of the amount of supplied ink that have been changed through fine adjustment are newly stored at a predetermined storage address on the floppy disk 9 or the magnetic bubble memo. In this format, 12
There are times when one of the equally divided areas ■~■ spans two panel units 22a~22d, and in this case, that area is included in the panel unit with the larger ink setting amount. It may be displayed in any format, or it may be included and displayed on the panel unit side where the ink setting amount is small.

The above floppy disk 9 and magnetic bubble memo IJIO
The image data may be stored in either the image patterns shown in FIGS. 3 to 6 as they are, or each pattern may be digitized and stored.

In the above embodiment, the printing cylinder 1 is 12 mm long in the axial direction.
Although the area is set by dividing it into equal parts, the area is not limited to 12 equal parts, and the area can be set by freely dividing the area into 12 equal parts.

"Effects of the Invention" As described above, according to the ink supply amount optimization method for a corrugated board printing machine according to the present invention, the ink supply amount for each area of the printing cylinder used last time is adjusted to print the next predetermined number of ordered sheets. At the time of printing, MA1 is adjusted according to printing conditions such as ambient temperature, etc., and the ink supply amount for each area that has been changed by fine adjustment is newly stored in the control device and used for the next printing. It is possible to simplify the setting of the ink amount and shorten the time for trial printing, and not only can print with the optimum amount of ink at all times, but also improves work efficiency and is extremely convenient in use.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the ink supply N optimization method for a corrugated board printing machine according to the present invention, in which the ink supply nozzle is moved to supply ink to areas set by dividing the printing cylinder into 12 equal parts. Figure 2 is a circuit diagram of a control device that controls the operations in Figure 1, Figure 3 is an image diagram showing the display contents of the display device, and Figures 4 to 6 are each ink amount display. FIG. 7 is a diagram showing another example in which the amount of ink supplied to each part is patterned.

Claims (1)

[Claims] In a corrugated board printing machine that supplies an arbitrary amount of ink to an arbitrary position in the axial direction of a printing cylinder equipped with a printing plate,
The ink supply amount corresponding to the area to be printed on the cardboard sheet of the printing cylinder is stored in advance in the control device that controls the ink supply amount, and each time the predetermined number of ordered sheets is printed, each of the above-mentioned items used previously is stored. The ink supply amount for each area is read out and finely adjusted according to printing conditions such as ambient temperature, and after printing is completed, the ink supply amount for each area changed by the fine adjustment is newly stored in the control device. A method for optimizing the amount of ink supplied to a corrugated board printing machine.