JPS6019534A - Regulation of ink fountain of printing machine - Google Patents

Abstract

PURPOSE:To make the regulation of ink fountain with high precision possible, by a method wherein the pattern areal ratio data of the newest printing matter is compared with that of printing matter to be printed later and the ink fountain is regulated on the basis of the data of difference of the two. CONSTITUTION:The arithmetic unit 12 consisting of microcomputer reads the number of ink fountains from ROM by the inserted magnetic card, reads the areal ratio of each ink fountain and write it into RAM. Then, because there are 2 groups of magnetic cards for the last time printing matter and those for printing matter to be printed in future as to 8 colors for the magnetic cards, said operation is repeated 16 times and the arithmetic unit 12 writes those data into RAM. On the basis of the data of this 2 groups, the differences of areal ratio of printing matter are obtained for those of the number of ink fountains and outputted to the printer. Then, on the basis of this output, at first the zero of scale 22 is adjusted to the pointer 21 of the last set value connected to the cap screw and then, the cap screw is so adjusted that the pointer 21 is in accord with the scale 22 according to the difference of areal ratio.

Description

[Detailed description of the invention] The present invention relates to a method for adjusting an ink fountain of a printing press.

The amount of ink supplied to the printing roller during printing 1'MK is adjusted by adjusting the ink supply from the ink to the ink source roller. And this adjustment is
This is done by adjusting the degree of approach of a fixed blade, which is provided so as to be in contact with the circumferential surface of the ink source roller. Figure 1 (a
), (In BL, the ink source roller 1 is in rolling relationship with the ink feed roller 2, and the ink source roller 1
The ink on the circumferential surface of is supplied to a printing roller (not shown) via an ink feeding roller 2ff. The ink supply to the ink source roller 1 is performed with the ink feed roller 2 and the opposite OI to the ink source roller IK! The degree of proximity of the blades 3a, 3b provided in I to the ink source roller 1, that is, the zero distance between the blades 3a, 3b and the ink source roller 1?
, 1: Komau j- "It can be adjusted from the rotor and K. The figure (a) shows the case of the single blade method, and the figure (b) shows the case of the split blade method〇), and the way the blade moves is somewhat different. Difference 1. C Ruga key I'+1] The work is done almost in a regression manner.

This ink supply adjustment machine is shown in more detail.
2 (a) to (d). First of all, (a) in the same figure shows the pot screw method, with 3 blades and anti-ink source roller l1llll.
A pot screw 4an that is set to be pushed from
By doing this, the distance between the blade 3 and the ink source roller 1 is adjusted, and the ink X reaches the circumferential surface of the ink source roller 1 through this distance. There are seven precepts. The figure (b) shows an eccentric cam system, in which an eccentric cam 4 is used instead of the pot screw 4a in figure (a).
Provide the eccentric cam 4b and rotate it by the motor to perform the same function as the pot screw 4a. Figure (C) shows Roland's method, in which the end face of the blade 3 is brought into contact with the circumferential surface of the ink source roller 1 at right angles, and there is no gap between the end face of the blade 3 and the ink source roller 1. Move the blade 3 steps to change the distance. Furthermore, the same figure (d)
Instead of using blade 2 as in each example above, block 5 is used.
The block 5 is installed at the bottom of the ink supply meter 6, and the block 5'? Is the distance between the block 5 and the circumferential surface of the ink source roller 1 rotated by a screw or motor? Adjust ink supply amount? Adjustment - r.

The ink adjustment of printing machines equipped with various types of ink adjustment mechanisms is performed manually, relying solely on the intuition of the operator.

However, such a method that relies on the intuition of the production staff does not necessarily allow for rational adjustment of the ink supply amount.

Does the present invention have the above-mentioned points? This was done by taking into consideration the ratio between the image area ratio data of the latest printed matter that has been printed in the printing machine and the image area ratio data of the printed matter that will be printed in the future, and the ratio and the cutting result. It is used to adjust the inkwell.

The ink supply meter of the printing press corresponds to the picture area ratio of the printed matter, and if you can find the picture area ratio of each color, what is this? Ink supply meter based? You can decide.

Here, since the printing machine prints a certain print and then prints the next print, what is the pattern area ratio of the print previously printed? Do you know the patterns of printed matter that will be printed in the future? Do you know the difference between the two? If you ask, you will know how much you should change the ink supply machine for printing from now on.

In other words, if you use the picture area ratio itself, you can know the ink supply end as an absolute value, but if you use the difference in the picture area ratio between the previous printed matter and the current printed matter, you can know the ink supply amount as a relative value. I can do it. It is more practical to adjust the ink supply LJ' and the ink supply LJ' to this relative value.

Therefore, in the present invention, the ink supply amount can be adjusted by the J value.

Figures 3 to 8r below! Embodiments of the present invention will be explained with reference to FIG.

Figure 3 shows data on the difference in pattern area ratio between the previous print and the print to be printed from now on. How to get? This is what is shown.

This is based on the signal obtained by optically scanning the entire pattern of the printed matter.
What kind of image does the printed matter look like? This is a measurement device that can obtain data for each color.

If 8 colors are printed 2 times, 8 pieces of data will be obtained.

In the figure, 1.1a is an insulating medium, such as a magnetic card, on which the data of the previous printed matter was recorded, and 11b is the recording medium on which the data of the printed matter to be printed is recorded.Here, an example of 8 colors is shown. It shows.

The recorded data on these two types of recording media 11a, ], 1b are read and calculated by the arithmetic unit 12Il'i, respectively.
The difference in pattern area ratio between the two printed materials is determined and outputted by the printer 13.

FIG. 4 is a flowchart showing the operation contents of the arithmetic unit 12 (f1) of FIG. 3, and the operation will be explained below based on this chart.

First, enter machine number 9, that is, the number of the printing press, on a keyboard (not shown) (J:) (S+). When the machine command number is input, the arithmetic unit 12 reads the ink fountain from the built-in ROM (S2). On the left side of printing 1, the number of ink wells is determined in the Eve type valve (if you know the machine number, you can find the i5 size type.
You can also tell for yourself how many ink pots there are.

If you insert the E-ki card in this state (S3), the machine number 0 recorded on the card will be 616 (S4).

As a result, the calculation unit 12 reads 1 data from the ROM and 6 data from the card? Check the recorded contents of the card in comparison (S8). If there is an error, reinsert the magnetic card, and if there is no error, read the area ratio from the card (S6), and write s, 'f in the arithmetic unit 12vc.
b Write to Rp, M (S7). This action is performed for the number of ink rhymes, for example, one time. And the magnetic cards are for 8 colors, one for the previous print (C1siJ item), one for the print to be printed (this time item), and two.
Since there is A11t, the above S3 to S? The operation is repeated 16 times.

Performance 3 based on the two sets of data written to the RAM
): the device 12 calculates the area ratio of the two printed matter G'J for each color.
'c output SS), surface ear f car difference wnl output - rho
(S9).

This calculation is performed for the number of ink fountains, and the result is output to the printer (Sil+).

Figure 5 is an example of printer σ) output sheet? This is what is shown. This sheet has machine number 44 in the upper margin.

and colors, etc., and in the lower part 11d there is a vase (KEY) N.
0, the difference in obedience (numerical value) and the difference in respect (graph) are shown.

Figures 6 (a) and (b) show the difference in pattern area ratio (drawing (a)) and l! on the output sheet shown in Figure 5. The actual ink fountain adjustment amount ((b) in the same figure) is shown in comparison with the actual ink fountain adjustment amount ((b) in the same figure).

Are these pictures 1 s 1? It can be seen that the graphs in both figures are very similar overall. However, there are some cases where the numbers of individual pots differ to some extent. This characteristic differs depending on the configuration of the printing press's blades, and therefore, the difference in image area ratio does not correspond to the ink fountain type, repellent type, and normal type.

Therefore, in the arithmetic unit 12 of FIG.
If you have to have 0 regular performances, printer 13 (
The output sheet of No. 31a) becomes the data of the ink fountain adjustment area as shown in FIG. 6 (bl).

Brush 7 (a), (b), and (c) are ink fountains manually adjusted based on the output sheet shown in Figure 5? This shows the operation procedure and contents of the screw dial that may be performed.

Now, the settings for the previous printed matter such as (a) Ic-f and J: 5 have been made. In this setting, one pointer 21 is connected to the pot screw and points downward to the left.
1, if the +5 of the scale 22 that rotates freely and prays matches,'
f;8).

When adjusting the base plate screw relative to this, as shown in the same figure (b), first of all, only the scale 22? Rotate it so that it matches the 'O' finger on scale 22, J21. This operation is next to pointer ke 21? It is a semi-commercial rack for rotating, and the scale is 02 on the pointer 21.
By aligning them, it becomes easier to work on the pointer 21. After that, as shown in FIG. Rotate by a predetermined amount based on $.

This means that the pot screw has been adjusted, and the same operation is performed for the storage screw. After the operation is completed, the finger 1 on the pointer 21 - the value on the scale 22? 1. If you compare it with the reading output sheet, you can confirm whether or not the subscrew adjustment was performed accurately.

In the above example, can the pot screw be adjusted by manual operation? I am doing it, but I can also convert it to v1 myself.

To do this, it is sufficient to provide an output control system to the ink adjustment mechanism and to operate this sub-adjuvant system by the output of the arithmetic unit 12 (FIG. 3).

As described above, the present invention provides difference data of the pattern area ratio between the pattern area wheel data of the previous printed material and that of the printed material to be printed from now on. Since the in-distribution adjustment 2 is performed based on the data, it is much higher than the conventional adjustment method that relies on the intuition of workers.
Make a lil bottle. In particular, since we set the relative difference Y x M'tt 'f based on the tnA set value for printed matter last time, when we print from now on and use only the data of the J:5 and printed matter to adjust the absolute value '1-' It is easier to work than, and the accumulation is higher.

[Brief explanation of the drawing]

Figures 1 (a) and (bl are explanatory diagrams of blades used in the ink adjustment mechanism for printing and taste, Figures 2 (a) to (d) are f diagrams showing various examples of the same ink adjustment machine grooves, Figure 3 shows the configuration of an apparatus for forming data for adjusting the ink supply amount in the method of the present invention, and Figure 4 shows the operation details of the apparatus shown in Figure 3.
15 is a flow chart showing the output sheet of the device shown in FIG. 3, and FIG. 6(a). (b) shows the match between J: picture area ratio data and ink fountain vJ: 4-setting resistance data in the method of the present invention. A7
Figures (a), (b) and (c) are explanatory diagrams of the ink supply A@ amount adjustment work performed based on the output of the device shown in Figure 3. 1... Ink source roller, 2... Ink supply Roller, 3...blade, 4.5...blade suppression mechanism. Applicant's representative Kiyoshi Inomata Figure 3 ((Q) Figure 7 Figure 5 (b)

Claims (1)

[Claims] Adjust the ink fountain of the printing machine to reduce the ink supply to the printing roller by 1τ? In this method, the image area ratio data of the latest printed matter that has been printed in the printing machine and the image area ratio data of the printed matter that will be printed in the printing machine from now on? What are the differences between the two? Find out and adjust the ink fountain of the printing press based on this difference data? What did you choose to do? Characteristics and method of adjusting the ink fountain of a printing press.