JP2000246881A - Production of multi-color printed metal sheet and printing apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve defective phenomenon wherein a pattern for each color is deviated caused by fluctuation of motor output and fluctuation of carrying speed of metal sheets when a printed metal sheet on the surface of which a pattern, etc. is multi-color-printed is prepd. SOLUTION: Phase position of each of plate rolls 28 and 28 is detected by means of phase sensors 40 and 41 in adjacently arranged roll printers 20 and 21. By refering the phase of the front step side plate roll 28, the rotating pitch of the back step side plate roll 28 is controlled by means of a control device 38 in such a way that the phase of the back step side plate roll 28 to the delivered metal sheet W coincides with the preceding reference to complete to coincide the phase relation between each of the plate rolls 28 and 28 and the metal sheet W printed thereby and to completely eliminate deviation of the pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a printed metal plate represented by a painted steel plate, and more particularly to a method of manufacturing a printed metal plate having a decorative pattern multicolor-printed on the surface of the metal plate, and a printing apparatus therefor.

[0002]

2. Description of the Related Art For example, a coated steel sheet on which a wood grain pattern or a ripple-like pattern is printed in multiple colors has been frequently used as a precedent material for forming a wall panel or the like. This kind of coated steel sheet is formed by applying a pre-treated web-shaped metal plate in one direction while forming a base layer by a roll coater, and then baking and drying. Next, a printing layer such as a pattern is formed on the surface of the underlayer using a gravure printing machine or the like, and a clear coating is applied to the surface of the uncured printing layer to form a protective layer. Bake and dry at the same time. A plurality of printing machines for forming a printing layer are arranged adjacent to each other, and can form printing patterns of different colors.

[0003]

When performing multi-color printing, there is a problem of misregistration of a printed pattern. In many cases, a printing machine adjacent to the front and back is driven synchronously via a gear transmission mechanism and a timing belt mechanism using a single motor as a drive source, thereby preventing a printing position from being shifted for each color. Furthermore, the misregistration is corrected by changing the circumferential speed of the plate roll and adjusting the phase thereof by a misregistration correction mechanism provided for each printing press.

[0004] By adopting the above-described pattern misregistration prevention measures, pattern misregistration can be suppressed to some extent, but it cannot be completely prevented, and the fact is that pattern misregistration occurs with a certain probability. The main cause of misregistration is that despite the fact that the rolls of the front and rear roll printing machines are synchronously driven,
It is considered that this is because the backlash of the transmission system and the fluctuation of the motor output cannot be avoided, and the transport speed of the metal plate is not always constant, but fluctuates due to tension adjustment or the like.

SUMMARY OF THE INVENTION It is an object of the present invention to reliably prevent a pattern shift due to a change in a feeding speed of a metal plate in a printing line of a printing metal plate in which a pattern is printed in multicolor using a roll printing machine. Improve the printing quality of the printed metal plate by
The purpose is to simultaneously improve the yield.

[0006]

According to the first aspect of the present invention, a plurality of roll prints are formed on a base layer 15 formed on a surface of a metal plate W while feeding the metal plate W in one direction as shown in FIG. The present invention is directed to a method of manufacturing a multicolor printed metal plate for printing a pattern in multicolor by the machines 20 and 21. Each roll printing machine 20 ・ 2
In 1, the phase references 42 and 43 provided on the respective rolls (28 or 29) are detected by the phase sensors 40 and 41, and based on the phase signal detected by the phase sensor 40 of the roll printing machine 20 on the preceding stage, Roll printing machine 21 at the later stage
Of the roll (28 or 29) with respect to the metal plate W of
The roll (2) for the metal plate W of the preceding roll printing machine 20
The control device 38 continuously controls the rotation pitch of the subsequent roll (28 or 29) so as to coincide with the phase of 8 or 29).

According to the present invention, the metal plate W
In addition to the above control, the following control is further performed so as to be able to cope with a long web. Roll printing machine 2 at the front stage
In the vicinity of the print position of 0, the feed pitch of the metal plate W is detected by the plate speedometer 36 on the upper side in the metal plate feed direction from the print position. Rolls (28 or 29) of each roll printing machine 20/21 based on the feed pitch signal detected by the speedometer 36
The control device 37 continuously controls the rotation pitch of the roll (28 or 29) so that the rotation pitch of the roll (28) matches the feed pitch of the metal plate W.

More specifically, each of the roll printing machines 20 and 2
1 comprises a gravure printing machine including plate rolls 28, and offset rolls 29, 29 for transferring a printing pattern on the peripheral surface of the plate rolls 28, 28,
21 plate rolls 28 or offset rolls 29
By disposing the phase references 42 and 43 at 29, the phase of each plate roll 28 and each offset roll 29 and 29 is detected by the phase sensors 40 and 41.

According to a fourth aspect of the present invention, there is provided the base layer formed on the surface of the metal plate while feeding the metal plate in one direction.
3. A method for producing a multicolor printed metal plate on which a pattern is printed in a plurality of colors by a plurality of roll printing machines 20 and 21.
In addition to the requirements described above, reference marks 46.4 provided on the peripheral surface of the roll (28 or 29) of each roll printing machine 20/21.
7 is transferred onto the underlayer 15 of the metal plate W, and the transferred pattern 49 is detected by the phase sensor 50. Based on a detection signal from the phase sensor 50, the controller 37
(28 or 2)
Roll printing machine 2 at the subsequent stage based on the rotation pitch of 9)
The controller 38 controls the phase of the roll (28 or 29) with respect to the first metal plate W to match the phase of the roll (28 or 29) with respect to the metal plate W of the preceding roll printing machine 20.
, The rotation pitch of the roll (28 or 29) of the subsequent roll printing machine 21 is continuously controlled.

[0010] More specifically, each roll printing machine 20.2.
1 comprises a gravure printing machine including plate rolls 28, and offset rolls 29, 29 for transferring a printing pattern on the peripheral surface of the plate rolls 28, 28,
21 plate rolls 28 or offset rolls 29
Reference marks 46 and 47 are arranged at 29.

According to a sixth aspect of the present invention, there is provided a printing apparatus comprising: a plurality of roll printing machines for performing multicolor printing of a pattern along a conveying path of a metal plate having a base layer formed on a surface thereof;
0.21 are arranged adjacent to each other. Each roll printing machine 20
The roll (2) is connected to the roll (28 or 29) via phase references 42 and 43 provided on the peripheral surface or side end surface of the roll (28 or 29).
8 or 29) phase sensors 40 and 41 for detecting the phase
Is provided. A control device 38 is provided which receives the phase signals from the phase sensors 40 and 41 and continuously controls the rotation pitch of the subsequent roll (28 or 29).
The control device 38 adjusts the phase of the roll (28 or 29) with respect to the metal plate W of the subsequent roll printing machine 21 based on the phase signal of the phase sensor The rotational pitch of the subsequent roll (28 or 29) is controlled so as to match the phase of the roll (28 or 29) with respect to the 20 metal plates W.

In particular, when the metal plate W to be printed is a long web, the metal plate W is located closer to the printing position of the roll printing machine 20 on the front stage and closer to the metal plate feeding direction than the printing position.
A sheet speed meter 36 for detecting the feed pitch of the sheet is arranged. A control device 37 is provided for matching the rotation pitch of the rolls (28 or 29) of the roll printing machines 20 and 21 with the feed speed of the metal plate W based on the feed pitch signal detected by the sheet speed meter 36.

[0013]

According to the first aspect of the present invention, the rolls (plate rolls 28, 28 or offset rolls 29.2) are controlled by the phase sensors 40, 41 for each roll printing machine 20, 21.
9), the phase signal output from each of the phase sensors 40 and 41 and the feed pitch of the metal plate W are subjected to arithmetic processing by the controller 38, and the metal plate W of the preceding roll printing machine 20 is processed. With reference to the phase of the roll (28 or 29) with respect to the roll (28 or 2) of the subsequent roll printing machine 21.
9) Since the rotation pitch is continuously controlled and the phases of the respective rolls (28 or 29) with respect to the metal plate W are made to coincide with each other, even if the transport pitch of the metal plate W fluctuates, or the front and rear roll printing machines 20 Even if the load on each of the motors 32 and 33 fluctuates, the pattern positions to be printed can be exactly matched.

When the metal plate W is a long web,
Due to the change in the transport speed, the printed pattern expands and contracts in the transport direction. In order to avoid such deformation, the feed pitch of the metal plate W is detected by the sheet speed meter 36, and based on the obtained feed pitch signal, the rotation of the rolls (28 or 29) of the front and rear roll printing machines 20 and 21 is performed. The pitch is continuously controlled by the control device 37.

In the present invention, if each of the roll printing machines 20 and 21 is a gravure printing machine, the phase references 42 and 43 are provided on the plate rolls 28 and the offset rolls 29 and 29. At this time, roll (28
Or 29) may be provided at an arbitrary position on the side end of the peripheral surface so that the phase references 42 and 43 are transferred to one edge of the metal plate W to be cut.
When the phase references 42 and 43 are provided on the side end surfaces of 9), it is possible to prevent the phase references 42 and 43 from being transferred to the metal plate W.

In the method according to the present invention, the reference marks 46 and 47 provided on the rolls (28 or 29) of the roll printing machines 20 and 21 at the front and rear stages, respectively, are simultaneously printed with the metal plate W.
Is transferred as a pattern 49 on the underlayer 15 of FIG. In the pattern 49, it is ideal if the reference mark 46 of the preceding roll printing machine 20 matches the reference mark 47 of the succeeding roll printing machine 21. However, the phase of the roll (28 or 29) with respect to the metal plate W of each of the front and rear roll printing machines 20 and 21 cannot be completely matched only by the control device 37 as already seen.
This phase mismatch appears as a positional shift in the pattern 49 on the metal plate W due to the transfer of the reference marks 46 and 47. The pattern 49 is detected by the phase sensor 50 while always recognizing the pattern. Based on the detection signal, the control device 37 controls the rotation based on the rotation pitch of the roll (28 or 29) of the preceding roll printing machine 20. The roll (28 or 2) of the subsequent roll printing machine 21 is
The rotation pitch of 9) is continuously controlled, and the phases of the rolls (28 or 29) with respect to the metal plate W of the front and rear roll printing machines 20 and 21 are always matched.

[0017]

FIG. 3 shows a continuous printing line of a coated steel plate (printed metal plate) to which the present invention is applied. There uncoiler 1
From the steel sheet web (metal sheet) W
And a first coating unit 4 for coating the surface of the metal plate W, respectively.
After the paper is fed to the second coating unit 5 and the printing unit 6 in the order described, the metal plate W is wound up again in a roll shape by the recoiler 8 via the tension leveler 7.

Four bridle rolls 9, 10, 11, and 12 for feeding a metal plate W are arranged at the front, middle, and rear of the coating sections 4 and 5, and at the rear of the printing section 6. By changing the peripheral speed of each of the bridle rolls 9, 10, and 11 based on the peripheral speed of the last bridle roll 12, the metal plate passing through both the coating units 4.5 and the printing unit 6 is changed. The tension state of W is controlled.

In FIG. 4, in the first coating section 4, the front surface (upper surface) and the rear surface (lower surface) of the metal plate W are
After applying a coating to each of the above, the coating material is forcibly dried in an oven 14 for a base to form primer layers 15a and 16a. In the second coating unit 5, the coating is performed by the roll coater 17 in the same manner as in the first coating unit 4, and the primer 15 a
After the colored base layer 15b (see FIG. 5) is formed on the surface of, the coating material is forcibly dried in the oven. That is, the underlayer 15 on the front side is formed by the primer layer 15a and the colored base layer 15b. In the second coating portion 5, the surface of the primer layer 16a on the rear surface side already formed is
A coating layer 16b is applied and formed by a roll coater 17, and the underlayer 16 on the back side is formed of two inner and outer coating layers 16a and 1a.
6b.

The printing unit 6 is provided with a printing apparatus according to the present invention. The printing apparatus includes two roll printing machines 20 and 21 arranged adjacent to each other along the transport path of the metal plate W as shown in FIG. The printing layers 22 having, for example, a wood-grain pattern are printed in multicolor by the machines 20 and 21. Thereafter, as shown in FIG. 5, a clear paint is applied to the entire surface of the base layer 15 including the print layer 22 with a roller curtain coater 23, a curtain coater, a roll coater or the like to form a protective layer.
And the protective layer is forcibly dried in the oven 25 at the same time. An auxiliary dryer 26 that blows out hot air is disposed downstream of each of the printing presses 20 and 21.

In FIG. 2, each of the roll printing machines 20 and 21
Is a gravure offset printing machine, a steel plate roll 28 composed of a gravure roll, and an offset roll 29 for transferring the printing pattern on the surface of the plate roll 28 to the metal plate W.
And a backup roll 30 made of steel for pressing the metal plate W in cooperation with the offset roll 29. The offset roll 29 is formed by winding a rubber layer around a steel roll. Reference numeral 31 denotes an inking head that directly charges the printing ink fed under pressure onto the peripheral surface of the plate roll 28. The plate roll 28 and the offset roll 29 are driven to rotate by motors 32 and 33, respectively, via a joint such as an Oldham shaft joint. The backup roll 30 is driven to rotate by a motor 34 via a joint.

The long metal plate W is composed of each bridle roll 9 to
12 (see FIG. 3), the feeding speed of the metal plate W passing through the roll printing machines 20 and 21 is not constant, and fluctuates every time the tension control is performed. In order to prevent the pattern from expanding and contracting due to such a change in the feed speed, as shown in FIG. 2, the feeding of the metal plate W is performed in the vicinity of the printing position of the preceding roll printing machine 20 and on the upstream side in the web feeding direction from the printing position. A non-contact speedometer 36 for detecting the pitch is arranged. The feed pitch signal detected by the plate speedometer 36 and the rotation pulse signal fed back from the motor 32 are compared by a control device 37 for speed control, so that the rotation pitch of the plate roll 28 is Servo motor 32.3 so that it matches the feed speed
The number of drive rotations of 3 is controlled to increase or decrease. Thus, the rotation pitches of the plate rolls 28 and the offset rolls 29 of the front and rear roll printing machines 20 and 21 are matched with the feed speed of the metal plate W.

The rotation of the motors 32 and 33 in each of the roll printing machines 20 and 21 varies very slightly, or the presence of backlash in the power transmission system causes the former plate roll 28 and the latter plate roll 28 to move. A phase shift may occur. Then, after detecting the phases of the plate rolls 28 and 28 with the phase sensors 40 and 41, the phase of the subsequent plate roll 28 with respect to the metal plate W is determined with reference to the phase of the former plate roll 28 with respect to the metal plate W. , And the control unit 38 for phase control matches the reference. For this purpose, as shown in FIG. 2, each of the phase sensors 40 and 41 detects a phase reference 42 and 43 provided at one end of the peripheral surface of each of the plate rolls 28 and 28, and detects the plate rolls 28 and 28. Is specified. The phase references 42 and 43 are formed, for example, as stamps, and are optically detected by phase sensors 40 and 41 such as an image sensor, a photo sensor, and a photoelectric switch. Phase reference 42 provided on each plate roll 28
The formation position of 43 is formed at the same place on the plate roll surface, for example, at the same distance from the reference position of the plate.

The control device 38 receives the phase signals from the phase sensors 40 and 41 at the front and rear stages, and based on the phase of the plate roll 28 and offset roll 29 at the front stage with respect to the metal plate W, the metal plate W Roll printing machine 20
The time (timing) required to move from the printing position to the printing position of the subsequent roll printing machine 21 is compared with the phase of the subsequent plate roll 28 and offset roll 29 with respect to the sent metal plate W. Then, the result is reflected on the motors 32 and 33 of the roll printing machine 21 at the subsequent stage.
Thereby, the rotational pitch of the subsequent plate roll 28 and offset roll 29 is increased or decreased, and the phases of the two plates 28 and 29 with respect to the metal plate W are made to match the above-mentioned reference, and the previously printed pattern of the preceding stage and the printing from now on are performed. The pattern in the subsequent stage can be exactly matched.

In the above continuous printing line, a steel plate,
Using a metal plate such as a plated steel plate, a stainless steel plate, or an aluminum plate as a base material, the surface can be subjected to necessary coating and printing. In the pre-processing unit 2, the above-described metal plate is immersed in a chromic acid or phosphoric acid solution as necessary to perform pre-processing. As the paint applied to the painting of both painting parts 4 and 5,
There are polyester-based resin paint, epoxy-based resin paint, acrylic-based resin paint, fluorine-based resin paint, and the like. The coating material for forming the primer layer is blended with a rust-preventive pigment as needed.

As a printing ink for forming the printing layer 22, a polyester resin or an alkyd resin,
An ink such as a fluororesin can be used. As the clear paint for forming the protective layer, a paint such as a polyester-based resin, an epoxy-based resin, an acrylic-based resin, and a fluorine-based resin can be applied.

The plate roll 28, the offset roll 29, and the backup roll 30 each have a dedicated motor 32
It is preferable to drive the plate rolls 33 and 34.
, The offset roll 29 and the backup roll 30 may be synchronously driven via a gear mechanism by using a single motor 32 for driving the roller.

The roll printing machine in the present invention is not limited to a gravure printing machine, but includes all printing machines in which a plate is wound on a rotating roll surface, and includes a case where two or more machines are arranged adjacent to each other. Including. The plate speedometer 36 is preferably a non-contact type, but may be a type that contacts the metal plate W, for example, a contact type that detects the plate speed with a touch roller. When multicolor printing of a pattern or the like is performed on the metal plate W cut into a predetermined length, the plate speedometer 36 and the control device 37 can be omitted. Phase sensor 4
As the 0.41, other sensors such as a magnetic sensor, a proximity switch, or a rotation speed sensor other than an optical sensor can be applied.

The phase references 42 and 43 may be provided on one end face of the plate rolls 28 and 28 of the front and rear roll printing machines 20 and 21, respectively, or as shown in FIG. Of the offset rolls 29, 29, preferably the offset rolls 29, 29 are made longer than the other rolls, and can be provided on that portion. In the example of FIG. 7, a phase reference 42 is provided on one end face of each offset roll 29.
43 may be provided, or the phase references 42 and 43
Are the phase sensors 40 from below on the outside in the width direction of the metal plate W.
At 41 it can also be detected. Incidentally, in the above embodiment, the metal plate W on which the shapes of the phase references 42 and 43 are printed
Since no transfer is made to the image, productivity can be improved.

FIG. 8 shows another embodiment of the present invention, which is similar to the previous embodiment, in the vicinity of the printing position of the preceding roll printing machine 20, and more advanced in the metal sheet feeding direction than the printing position. A plate speedometer 36 for detecting the feed pitch of the metal plate W based on the number of rotations of the guide roll 45 disposed on the side is disposed.
The feed pitch signal detected by the plate speedometer 36 and the rotation pulse signal fed back from the servomotor 32 of the plate roll 28 are compared by a control device 37 for speed control, whereby the rotation pitch of the plate roll 28 is calculated. Servo motors 32 and 33 so that
Is controlled to increase or decrease. Thus, the rotation pitches of the plate rolls 28 and the offset rolls 29 of the front and rear roll printing machines 20 and 21 are matched with the feed speed of the metal plate W.

Then, in the front and rear roll printing machines 20 and 21 composed of the same gravure printing machine as in the previous embodiment, for example, cross-shaped reference marks 46 and 47 are formed at one end of the peripheral surface of the plate rolls 28 and 28. It is formed by engraving at the same position, so that the reference marks 46 and 47 are transferred as patterns 49 to the one edge in the width direction on the base layer 15 of the metal plate W via the offset rolls 29 and 29 at the time of printing. Set. This pattern 49 appears generally as shown in FIG. The pattern in FIG. 9 shows that the phase of the plate roll 28 with respect to the metal plate W of the front and rear roll printing machines 20 and 21 is correctly matched. In the pattern of FIG. 9, the phase is shifted only in the left-right width direction. In the pattern of FIG. 9, the phase is shifted only in the front-rear longitudinal direction. It shows that the position is displaced in both front and rear longitudinal directions. The same members as those in the previous embodiment are denoted by the same reference numerals, and description thereof will be omitted.

When appropriate, the front and rear roll printing machines 20.
Since the phase shift of the plate rolls 28 with respect to the metal plate W of 21 appears as a position shift in the pattern 49 transferred onto the metal plate W, this pattern 49 is always optically detected by the phase sensor 50. Based on the detection signal from the phase sensor 50, the phase of the plate roll 28 with respect to the metal plate W of the subsequent roll printing machine 21 is determined based on the rotation pitch of the plate roll 28 of the preceding roll printing machine 20 by the control device 37. Of the plate roll 28 with respect to the metal plate W of the preceding roll printing machine 20 so that
In step 8, the rotation pitch of the plate roll 28 of the subsequent roll printing machine 21 is continuously controlled.

By controlling the rotation pitch of the plate roll 28 of the subsequent roll printing machine 21 by the control device 38, FIG.
And the positional deviation in the longitudinal direction of the metal plate shown in FIG. 9 may be controlled by a centering device for the metal plate W provided on the upstream side in the web feeding direction of the roll printing machine.

In the embodiment shown in FIG. 8, reference marks 46 and 47 may be provided at the same corresponding positions on the offset rolls 29 and 29 of the front and rear roll printing machines 20 and 21, respectively. Pattern 4 by transfer of these reference marks 46 and 47
9 may select a part of the print pattern to be printed on the metal plate W.

[0035]

According to the first and sixth aspects of the present invention, when performing multicolor printing on a metal plate W, the rolls (28 or 2) of the front and rear roll printing machines 20 and 21 for each color are printed.
9) The phase with respect to the metal plate W is determined by the phase sensors 40 and 41.
, And the signals and the feed pitch of the metal plate W are processed by the control device 38, and then the roll (2
8 or 29) on the basis of the phase with respect to the metal plate W, so that the phase of the subsequent roll (28 or 29) with respect to the metal plate W matches the earlier reference. Since the rotation pitch is increased / decreased, it is possible to reliably prevent misregistration of the pattern printed by each roll printing machine 20/21, thereby simultaneously improving the print quality of multicolor printed metal plates and improving the yield. it can.

Also in the present invention according to claim 4, the reference marks 46 and 47 provided on the peripheral surface of the roll (28 or 29) of each of the front and rear roll printing machines 20 and 21 are patterned on the metal plate W. The pattern 49 is transferred and recognized by the phase sensor 50 and detected. The detection signal and the feed pitch of the metal plate W are processed by the control device 38, and the roll (28) based on the original control device 37 based on the original control device 37 is used. Or 29) with reference to the phase of the metal plate W, so that the phase of the roll (28 or 29) of the subsequent stage (28 or 29) matches the phase of the metal plate W of the latter stage. Since the number of prints is increased or decreased, it is possible to reliably prevent misregistration of a printed pattern.

[Brief description of the drawings]

FIG. 1 is a principle explanatory view conceptually showing the contents of the present invention.

FIG. 2 is a schematic front view of the roll printing machine.

FIG. 3 is a conceptual diagram showing a printing line of a printing metal plate.

FIG. 4 is a conceptual diagram of a painting section.

FIG. 5 is a conceptual diagram of a printing unit.

FIG. 6 is a front view of a printing unit.

FIG. 7 is an explanatory view of a principle corresponding to FIG. 1 showing another embodiment of the present invention.

FIG. 8 is a principle explanatory view showing still another embodiment of the present invention.

FIG. 9 is a plan view of a metal plate for explaining a pattern in the embodiment of FIG. 8;

[Description of Signs] 15 Underlayer 20 ・ 21 Roll printer 28 Plate roll 29 Offset roll 36 Plate speedometer 37 ・ 38 Controller 40 ・ 41 Phase sensor 42 ・ 43 Phase reference W Metal plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B41F 33/08 B41F 33/08 S (72) Inventor Shigeru Nishi 4-20, Himejima, Nishiyodogawa-ku, Osaka-shi, Osaka No.5 902 F term (reference) 2C034 AA26 AD12 2C250 EA33 EA34 EA35 EB26 EB29 4D075 AC25 AC93 AC94 AE03 CA47 CB36 DA06 DB01 DC02 EA33 4F100 AB01A AK17B AK25B AK41B AK53B AT00 GB95 EJ13 GB01 EJ13 GB

Claims (7)

[Claims] 1. A plurality of roll printing machines 2 on a base layer 15 formed on a surface thereof while feeding a metal plate W in one direction.
A method for producing a multi-color printed metal plate for printing a pattern in 0.21 in a multi-color printing method, wherein each of the roll printing machines 20 and 21 includes a phase sensor 42 and 43 provided on each roll (28 or 29). The phase of the roll (28 or 29) with respect to the metal plate W of the succeeding roll printing machine 21 is determined based on the phase signal detected by the phase sensor 40 of the preceding roll printing machine 20 as detected by the first and second stages 40 and 41. The control device 38 continuously controls the rotation pitch of the roll (28 or 29) of the subsequent roll printing machine 21 so as to match the phase of the roll (28 or 29) with respect to the metal plate W of the roll printing machine 20 of FIG. A method for producing a multicolor printed metal plate, characterized by the following. 2. In the vicinity of the printing position of the preceding roll printing machine 20, the feed pitch of the metal sheet W is detected by the sheet speed meter 36 on the upper side in the metal sheet feeding direction from the printing position. The control device 37 rotates the roll (28 or 29) so that the rotation pitch of the roll (28 or 29) of each of the roll printing machines 20 and 21 matches the feed speed of the metal plate W based on the detected feed pitch signal. The method for producing a metal plate for multicolor printing according to claim 1, wherein the pitch is continuously controlled. 3. Each of the roll printing machines 20 and 21 is a gravure printing machine including plate rolls 28 and offset rolls 29 and 29 for transferring a printing pattern on the peripheral surface of the plate rolls 28 and 28. 3. The method according to claim 1, wherein the plate rolls 28 or the offset rolls 29 of the roll printing machines 20 and 21 are provided with phase references 42 and 43, respectively. 4. A plurality of roll printing machines 2 on a base layer 15 formed on the surface of a metal plate W while feeding the metal plate W in one direction.
A multi-color printing metal plate manufacturing method for multi-color printing of a pattern at 0.21 by a metal plate W near the printing position of the roll printing machine 20 on the front stage and on the metal sheet feeding direction upstream from the printing position. The feed pitch of the metal plate W is detected based on the feed pitch signal detected by the speedometer 36. While continuously controlling the rotation pitch of the roll (28 or 29) by the control device 37 so as to match with the reference mark 46, the reference mark 46 / provided on the peripheral surface of the roll (28 or 29) of each roll printing machine 20/21. 47 is transferred onto the underlayer 15 of the metal plate W, and the transferred pattern 49 is detected by the phase sensor 50. Based on the detection signal from the phase sensor 50, the control device 37 controls the preceding roll printing machine 2 Roll of 0 (28
Or 29), the phase of the roll (28 or 29) with respect to the metal plate W of the preceding roll printing machine 20 is the same as that of the roll (28 or 29) with respect to the metal plate W of the preceding roll printing machine 20. The control device 38 controls the roll (28 or 2) of the subsequent roll printing machine 21 so as to match the phase.
9) The method for producing a metal plate for multicolor printing, wherein the rotation pitch is continuously controlled. 5. Each of the roll printing machines 20 and 21 comprises a gravure printing machine including plate rolls 28 and offset rolls 29 and 29 for transferring a printing pattern on the peripheral surface of the plate rolls 28 and 28. 5. The method for producing a metal plate for multi-color printing according to claim 4, wherein the reference marks 46, 47 are provided on the plate rolls 28, 28 or the offset rolls 29, 29 of the roll printing machines 20, 21. 6. A metal plate W having a base layer 15 formed on its surface.
A plurality of roll printing machines 20 and 21 for multi-color printing of the pattern are arranged adjacent to each other along the transport path of the roll printing machine. Each of the roll printing machines 20 and 21 has a roll (28 or 2).
Phase sensors 40 and 41 for detecting the phase of each roll (28 or 29) are provided via phase references 42 and 43 provided on the peripheral surface or side end surface of 9). And a controller 38 for continuously controlling the rotation pitch of the subsequent roll (28 or 29) in response to the phase signal of the following stage. The controller 38 controls the phase of the phase sensor 40 of the front roll printing machine 20. Based on the signal, the phase of the roll (28 or 29) with respect to the metal plate W of the subsequent roll printing machine 21 matches the phase of the roll (28 or 29) with respect to the metal plate W of the preceding roll printing machine 20. And a multi-color printing metal plate printing apparatus for controlling the rotation pitch of the subsequent roll (28 or 29). 7. A sheet speed meter 36 for detecting a feed pitch of the metal plate W is disposed near the printing position of the roll printing machine 20 on the preceding stage, and on the upper side in the metal plate feeding direction from the printing position. 7. A control device 37 for matching the rotation pitch of the rolls of each of the roll printing machines 20 and 21 with the feed speed of the metal plate W based on the feed pitch signal detected by the sheet speed meter 36. A printing device for a multicolor printing metal plate according to the above.