JP6851604B2 - Printing resin letterpress pasting device - Google Patents

Description

In the present invention, as a preparatory step for printing, a printing resin letterpress (also referred to as a printing plate) is attached to the outer peripheral surface of a cylindrical sleeve mounted on a plate cylinder of a flexographic rotary printing press. Regarding the device.

As shown in FIG. 1, in the sleeve-type multicolor flexographic rotary printing press 1, a sleeve (hereinafter referred to as a printing plate sleeve) 20 to which a plate-shaped printing resin letterpress 5 that has already been made is attached to a cylindrical surface is used. Printing is performed in a state of being inserted into the plate cylinder 2 of the printing machine. The printing resin letterpress 5 has a cushion tape 4 having adhesive layers on both sides and having a cushion layer attached to the outer peripheral surface of the sleeve 3 and then attached onto the cushion tape 4.

In Figure 1, the amount indicated by I _mp, cushioned tape 4 and printing resin relief plate that occurs when the print resin relief plate 5 to be printed substrate 6 on the impression cylinder 7 is pushed with a predetermined pressure for printing The amount of crushing of 5 is called printing pressure. When the printing pressure _Imp is increased or decreased in the printing process, the degree of compression of the cushion tape 4 and the printing resin letterpress 5 changes. On the other hand, the printing machine control unit controls the rotation according to the set print repeat length. The print repeat length is the printing length for one rotation of the printing plate sleeve 20, and the printing machine control unit is set to the length for printing on the substrate 6 to be printed under the tension load state at the time of printing. As a result, _{even if the printing pressure Imp} is increased or decreased, the distance at which the substrate 6 to be printed is sent out during one rotation of the printing plate sleeve 20 becomes the set value of the print repeat length and does not change.

Therefore, if the peripheral length of the printing plate sleeve 20 due to the plate body diameter D _p does not match the printing repeat length set in the printing machine control unit, the printing resin is used for the printing base material 6 running in the printing machine. The letterpress 5 has a speed difference. If the substrate 6 to be printed slips on the printing resin letterpress 5, for example, the printing stretches so that the circular pattern becomes oval. If it is printed longer than the original, the pattern shape, hue, and color density will change. Such a phenomenon is called a slur, and a slur having a length of 0.02 mm or more is generally one of printing defects. As shown in FIG. 1, holds the relationship sewing up diameter D _po-a unpressurized state is equal to D _p + 2I _mp, set the [pi] D _p becomes the print repeat length to the printing press control unit, the printing result document repeat If it matches the length, normal printing can be reproduced. State even when setting the [pi] D _p becomes the print repeat length to the printing press control unit, the pasting device, as shown in FIG. 2, sewing up diameter D _po-a unpressurized state is not equal to D _p + 2I _mp If it is pasted with, a slur will occur.

The outer diameter of the letterpress sleeve 20 to which the printing resin letterpress 5 has been attached has a variation with respect to a geometrically ideal cylinder. By demonstrating elasticity, the cushion tape 4 absorbs an error in the finished diameter and absorbs an impact during printing to assist in microscopic deformation of the printing resin letterpress 5. .. The cushion tape 4 has an auxiliary function for reproducing an image without crushing even a small point on the printing plate even if a partial printing pressure is applied, and a printing pressure adjusting work performed by the printing operator. It works to secure a wide allowable range. In the production of the cushion tape 4, high manufacturing technology is required to uniformly produce the thickness of the elastic tape, and if the production lot of the cushion tape 4 is different, the thickness will be different. Generally, the quality of the cushion tape 4 is controlled so that it fits in the range of about ± 7% of the thickness.

In the plate-shaped printing resin letterpress 5, the photosensitive resin is generally selectively exposed to special light to cause a cross-linking reaction to be cured, and the non-cross-linked portion not exposed to light is washed away with a developing solution and dried. Plates are made by creating convex parts by the technique of developing by post-exposure or drawing the surface with a laser. However, regarding the plate thickness, the cupping phenomenon shown in Patent Document 1, the swelling characteristics of the resin in the developing process, uneven drying, the decrease in the irradiation intensity of the exposure light source over time, and the ultraviolet rays of the printing resin letterpress Since the plate thickness decreases and non-uniformity occurs due to variations in the permeation amount due to uneven absorption, the thickness is not uniform over the entire surface of the printing resin letterpress. In addition, there is a difference in plate thickness for each developing device.

One of the print qualities related to the printing plate sleeve is the print repeat length as an item for confirming whether the print can be reproduced according to the dimensions of the original. If the print repeat length exceeds the permissible range of the original repeat length, it is possible to investigate and improve the pre-development process, the development process, the pasting process with the pasting device, and the printing process. ..

As shown in FIG. 3, when the plate-shaped printing resin letterpress 5 is cylindrically wound around the cushion tape 4 on the sleeve surface, the outer surface of the printing resin letterpress 5 easily extends as shown _{by ΔL p.} , The inner surface shrinks slightly. When making a plate-shaped printing resin letterpress 5 in order to reproduce printing according to the dimensions of the original, the stretched portion is added in advance to the original in the rotation direction (or top-bottom direction) of the letterpress sleeve 20. Make the image slightly smaller than the size of. The rate of reduction at this time is called the reduction rate.

The reduction ratio needs to consider not only the elongation of the printing resin letterpress 5 in the vertical direction but also the elongation of the substrate 6 to be printed in the printing process. During printing, tension is applied to the continuous substrate 6 to be printed and the printing is carried out in the printing machine to continuously print. On the other hand, the print repeat length is evaluated by flattening the substrate 6 to be printed in a tension-released state after printing. In particular, in the case of a flexible packaging material film in which the substrate 6 to be printed is easily stretchable, the print repeat length is controlled in consideration of the stretched portion due to tension.

Here, the relationship between the print repeat length of the printing plate sleeve 20, each outer diameter, and the reduction ratio will be described. Each related element is expressed as follows.
T: Tension (force that pulls the substrate 6 to be printed 6 in the traveling direction during printing) [N]
T _p : Tension for achieving _{document repeat length A rl} using the current printing plate sleeve 20 [N]
M _t : Thickness of substrate 6 to be printed [mm]
W: Width of substrate 6 to be printed [mm]
E: Tensile elastic modulus of substrate 6 to be printed [MPa]
A _rl : Original repeat length [mm]
L: Flat length of the printing resin letterpress 5 obtained by multiplying the original repeat length by the reduction ratio [mm]
L = δ _p A _rl / 100
_Ar-2 : Distance on the document between two specific image areas A and B separated in the vertical direction [mm]
L _p-2 : Distance on the printing resin letterpress when flat between two specific image areas A and B separated in the vertical direction [mm]
L _p-2 = δ _p A _r-2 / 100
P _rl-r : Print repeat length under tension load during printing [mm]
P _rl-a : Print repeat length in the tension release state after printing [mm]
_Imp : Printing pressure used to calculate the print repeat length for plate making [mm]
D _s : Sleeve outer diameter [mm]
D _po-a : Finished diameter without pressure [mm]
D _po-a = D _s +2 (C _t + P _t -ΔC _t -ΔP _t )
D _p : Plate body diameter [mm]
D _p = D _s +2 (C _t + P _t -ΔC _t -ΔP _t -I _mp )
D _ph : Diameter [mm] of the bending neutral surface 9 of the printing resin letterpress 5 in the letterpress sleeve 20.
D _ph = D _s +2 (C _t -ΔC _t + h)
C _t : Cushion tape 4 thickness (nominal value) [mm]
P _t : Thickness of resin letterpress 5 for printing (nominal value) [mm]
ΔC _t : Compression amount of cushion tape 4 in the pasted state [mm]
ΔP _t : Amount of decrease in thickness of printing resin letterpress 5 [mm]
h: Height from the adhesive surface of the printing resin letterpress 5 to the bending neutral surface 9 [mm]
θ: The angle [°] between the two specific image areas A and B on the printing plate sleeve 20 with the sleeve axis.
α: Angle formed by the printing resin letterpress 5 having a straight line length L attached to the sleeve 3 with the center of the sleeve [°]
δ _p : Reduction ratio [%] already applied to the printing resin letterpress 5.
δ _p = L / A _rl × 100
δ _i : Optimal reduction rate [%]
π: Pi (3.14159 ...)

A surface in which the arc length in the curved state coincides with the flat length, that is, the bending neutral surface 9, is shown by a alternate long and short dash line in FIG. The height h from the adhesive surface of the printing resin letterpress 5 to the bending neutral surface 9 has different values depending on the brand of the printing resin letterpress 5. The height h of the bending neutral surface 9 is a value that can be grasped in advance.

In the flexographic rotary printing press, the print repeat length P _{rl -r} is input to the printing press control unit when the operation is started. As shown in FIG. 1, the printer control unit, according to the input values of the print repeat length as the plate cylinder diameter D _p and the printing base material 6 compressed receiving impression I _mp is the same speed plate Determine the rotation ratio of the torso and start driving. In the printing process, even when the printing pressure _Imp is increased to further compress the plate surface and the cushion tape 4, if the rotation ratio of the plate cylinder 2 to the substrate 6 to be printed does not change, the print repeat length Does not change.

Here, the Bando径D _p, impression I _mp sewing up diameter D _po-a of pressure-free state is compressed when the loaded, means assumed diameter that tapers only impression I _mp min To do. The print repeat length P _rl-r during printing is expressed by the following equation obtained by multiplying this plate body diameter D _{p by the circumference ratio.} However, it is a condition that the _{print repeat length is entered as P rl -r} in the printing press control unit.
P _rl-r = _{π D p} = π {D _s +2 (C _t + P _t -ΔC _t -ΔP _t -I _mp )} ・ ・ ・ ・ ・ (1)

In general, the relationship between elongation and tension T is non-linear, such as the tensile elastic modulus E of some of the substrates 6 to be printed changes with elongation. However, the tension during printing is determined within the elastic limit where no residual strain appears. Therefore, the amount of the substrate 6 to be printed stretched by the tension can be treated as having a direct proportional relationship with the tension. Relationship between the print repeat length P _rl-a in the tension released state after printing the print repeat length P _rl-r during printing is expressed by the formula (2). _{The relationship between the finished diameter D po-a} in the non-pressure state and the print repeat length is expressed by Eq. (3). However, it is a condition that the _{print repeat length is entered as P rl -r} in the printing press control unit.
P _rl-a = π {D _s +2 (C _t + P _t -ΔC _t -ΔP _t -I _mp )} / {1 + T / (M _t・ W ・ E)} ・ ・ ・ ・ ・ (2) )
D _po-a = 2I _mp + P _rl-a {1 + T / (M _t・ W ・ E)} / π ・ ・ ・ ・ ・ (3)

_{In order to reproduce the print repeat length P rl-a} to the same length as the original repeat length A _rl without causing the slur phenomenon due to the pasting quality, the elongation due to the tension T of the substrate 6 to be printed is required. _{, And the actual values of the fluctuations ΔC t} and ΔP _t with respect to the thickness of the cushion tape 4 and the printing resin letterpress 5 are grasped, the print repeat length is calculated by the equations (1) and (2), and printing is performed. Enter the value _{of P rl -r} into the machine control unit, make a plate at a reduction ratio that takes into account the actual values of _{ΔC t} and ΔP _t , and determine the _{amount of compression ΔC t of the cushion tape 4 at the time of pasting.} It is important to control the compressive force on the cushion tape 4 so as to have a value.

FIG. 4 shows a cross section of the printing plate sleeve 20. When the printing resin letterpress 5 is attached, the cushion tape 4 is slightly compressed. In FIG. 1, the amount of compression ΔC _{t is the height h up to the bending neutral surface 9, the distance L p-2} between the two specific image portions A and B on the printing resin letterpress 5, and the printing plate sleeve 20. It is expressed by the following equation by the angle θ formed by the two specific image areas A and B above.
ΔC _t = 0.5D _s + C _{t -1.8δ p}・ A _r-2 / θ / π + h ・ ・ ・ ・ ・ (4)
= 0.5D _s + C _{t -180L p-2} / θ / π + h ・ ・ ・ ・ ・ (5)

The optimum reduction ratio δ _{i for inputting the print repeat length as the value of P rl -r} to the printing press control unit and setting the print repeat length in the tension release state after printing to P _rl-a is given by the following equation. expressed.
δ _i = π {D _s +2 (C _t -ΔC _t + h)} / P _rl-a × 100 ・ ・ ・ ・ ・ (6)

As shown in FIG. 1, the angle θ formed by the two specific image portions A and B on the printing plate sleeve 20 is
θ = L _p-2 × 360 / {D _s +2 (C _t -ΔC _t + h)} / π ・ ・ ・ ・ ・ (7)
Here, as shown in FIG. 2, when the rotation angle when ΔCt = 0 is set, it is expressed _{by θ 0.}
θ ₀ = L _p-2 × 360 / {D _s +2 (C _t + h)} / π ・ ・ ・ ・ ・ (8)
_{Now, when the mandrel is turned by an angle θ 0 from the} specific image area A on the sleeve to which the cushion tape 4 is attached, the printing resin letterpress 5 is wound around the sleeve, and the cushion tape 4 is stopped, the compression amount of the cushion tape 4 is ΔC _t . Since it is affected, when ΔC _t > 0, the specific image portion B is still in a state where a small distance is left before it comes into contact with the cushion tape 4 and is attached, or vice versa. When ΔC _t <0, it is already wrapped and pasted. When the minute distance from the position rotated at the angle θ _{0 to the specific image portion B is expressed by ΔL pB} (see FIG. 13), the following equation holds.
ΔC _t = 0.5 {D _s +2 (C _t + h)} ΔL _pB / L _p-2・ ・ ・ ・ ・ (9)

In order to tailor the printing plate sleeve 20 which can reproduce the printing length according to the length of the original and does not cause a slur, as described above, the amount of decrease in the thickness of the printing resin letterpress 5 ΔP _t and the pasting It is important to know _{the compression amount ΔC t} of the cushion tape 4 in the rolled state. However, conventionally, it has not been considered to individually grasp and utilize _{the thickness reduction amount ΔP t} of the printing resin letterpress 5 and the compression amount ΔC _{t of the cushion tape 4.} Also, previously, it has not been considered to equip the pasting device with a means for measuring these.

As an example of the pasting device, there is one equipped with a rayon roller. _{However, the pressing mechanism of the rayon roller does not have a means for grasping the compression amount ΔC t} of the cushion tape even if the total width of the printing resin letterpress on the sleeve changes, so that the compression amount ΔC _t becomes a predetermined amount. There is no such function. Therefore, when multiple printing resin letterpress plates are pasted on one sleeve, the compression amount ΔC _t of the cushion tape differs depending on the pasting order, and the first pasted plate is more than the last pasted plate. However, there was a problem that the print length was slightly shortened.

In Patent Document 2, the deviation from the geometrically correct plate cylindrical surface of the surface of the printing plate sleeve is scanned as topography data and displayed as reference data when determining the appropriate printing pressure for the measured printing plate sleeve. , A pasting device with a scanning head having a recording function is described as one of the purposes of eliminating waste during printing. The scanning system shown in Patent Document 2 is configured to bring a rotating follower roll into contact with a printing plate sleeve. However, the measurement result is to set the optimum printing pressure and register mark alignment in the printing press, and to set the print repeat length in the printing press control unit so as not to generate a slur in the measured printing plate sleeve. It is used to improve the printing process on the premise that the printing plate sleeve that has already been pasted is used for printing. _{Therefore, with this pasting device, the total value of the reduction amount ΔP t} of the thickness of the printing resin letterpress and the compression amount ΔC _t of the cushion tape can be grasped, but these cannot be grasped individually.

In Patent Documents 3 and 4, a pasting device that scans the finished diameter of the printing plate surface and the thickness of the cushion tape with a non-contact sensor such as a camera aims to eliminate waste during printing. It is listed as one. _{However, with these pasting devices, the total value of the reduction amount ΔP t} of the thickness of the printing resin letterpress and the compression amount ΔC _t of the cushion tape can be grasped, but these cannot be grasped individually.

Patent Document 5 describes a state before the cushion tape is applied and a state after the cushion tape is applied by using a two-dimensional reflective laser displacement sensor equipped with ^{E 3-CMOS image sensor technology or the like.} By scanning the outer peripheral surface of the cylinder with either or both, it is inspected whether the sleeve cylindrical surface has any abnormalities such as foreign matter adhesion or surface defects, and it is confirmed that there are no abnormalities. A pasting device that enables pasting of a resin letterpress for printing is described. However, with this pasting device, although the thickness of the cushion tape can be grasped, the thickness of the resin letterpress for printing and the compression amount ΔC _t of the cushion tape cannot be grasped.

As described above, the pasting apparatus described in Patent Documents 2 to 5 individually sets the thickness of the cushion tape compressed in the state after the printing resin letterpress is pasted and the thickness of only the printing resin letterpress. It is not something to measure. Although these prior arts aim to eliminate waste during printing, they aim to share information for the pre-development process, which is the pre-printing stage, and reduce the reduction ratio to reproduce the print repeat length as the original. It does not provide information and support that can be used in the pre-development process by examining the optimization of.

Japanese Unexamined Patent Publication No. 2004-90651 U.S. Pat. No. 8534194 International Publication No. 2010/060884 International Publication No. 2010/146040 International Publication No. 2013/076526 International Publication No. 2017/110837

An object of the present invention is to provide a printing resin letterpress pasting device capable of suitably eliminating the influence of the slur phenomenon and, by extension, enabling high-precision, high-quality printing in a printing machine. ..

The printing resin letterpress pasting device according to the present invention is
It is equipped with a table on which a resin letterpress for printing is placed and a mandrel that is inserted into a cylindrical sleeve and rotates the sleeve around the axis, and printing is performed on the sleeve with cushion tape attached to the outer peripheral surface while rotating. In the printing resin letterpress pasting device, which sticks the resin letterpress for printing
A plate thickness measuring device that measures the thickness of the printing resin letterpress placed on the table,
A left-right positioning device that can move in the direction of the mandrel's rotation axis,
A reflective laser displacement meter that measures the thickness of the cushion tape that is supported by the left and right positioning devices so as to face the mandrel and is attached to the outer peripheral surface of the sleeve.
It is a printing resin letterpress pasting device including a calculation unit that calculates the print repeat length based on the measurement result.

In addition, another printing resin letterpress pasting device according to the present invention is
It is equipped with a mandrel that is inserted into a cylindrical sleeve and rotates the sleeve around the axis, and an encoder that detects the rotation angle of the mandrel. In the printing resin letterpress pasting device, which sticks the printing resin letterpress
A left-right positioning device that can move in the direction of the mandrel's rotation axis,
A confocal displacement meter that measures the thickness of the cushion tape attached to the outer peripheral surface of the sleeve and the thickness of the resin letterpress for printing, which is supported by the left and right positioning devices so as to face the mandrel.
It is a printing resin letterpress pasting device including a calculation unit that outputs measurement results as a distribution on the outer peripheral surface of the sleeve.

in this case,
The calculation unit can adopt a configuration in which the print repeat length is calculated based on the measurement result.

Further, another device for pasting the resin letterpress for printing according to the present invention is
A table on which the printing resin letterpress is placed, an imaging unit that images the surface of the printing resin letterpress, a mandrel that is inserted into a cylindrical sleeve and rotates the sleeve around the axis, and an encoder that detects the rotation angle of the mandrel. In the printing resin letterpress pasting device, the printing resin letterpress is pasted on the sleeve while rotating the sleeve to which the cushion tape is pasted on the outer peripheral surface.
A plate thickness measuring device that measures the thickness of the printing resin letterpress placed on the table,
A geometric shape search function that automatically recognizes the contours of specific image areas of the same shape provided at at least two locations in the rotation direction of the printing resin letterpress imaged by the image pickup unit, and the image area is set to the image area from the reference position of the image pickup unit. An image processing means having a position measurement function up to the point
It is a printing resin letterpress pasting device including a calculation unit that calculates the print repeat length based on the measurement result.

Here, as one aspect of the printing resin letterpress pasting device according to the present invention,
It is possible to adopt a configuration in which a pressing member is provided which abuts the printing resin letterpress on the table from above and presses the printing resin letterpress against the table surface.

in this case,
The plate thickness measuring device is
With the following roller,
An interlocking member that moves by pressing the follow-up roller against the printing resin letterpress to follow the thickness of the printing resin letterpress.
A displacement sensor that measures the displacement of the following roller,
It is possible to adopt a configuration in which a lifting device capable of moving a following roller is provided on the upper part of the table at an intermediate position between the vertical surface including the rotation axis of the mandrel and the pressing member.

Further, as another aspect of the printing resin letterpress pasting device according to the present invention,
A detachable mechanism equipped with an air cylinder and
A rayon roller that is rotatably supported by a detachable mechanism so that it is parallel to the mandrel,
Solenoid valve and
Equipped with an electropneumatic regulator
The calculation unit can adopt a configuration in which the air pressure is automatically adjusted according to the width of the printing resin letterpress on the sleeve.

Alternatively, as another aspect of the printing resin letterpress pasting device according to the present invention,
A detachable mechanism equipped with an electric actuator composed of a motor, a ball screw, a piston rod and a main body,
A rayon roller that is rotatably supported by a detachable mechanism so that it is parallel to the mandrel,
A configuration can be adopted in which a control unit for controlling the operation of the motor is provided.

Further, as another aspect of the printing resin letterpress pasting device according to the present invention,
It is possible to adopt a configuration including a recording unit that can updateably record the width and thickness of the base material to be printed and the tension suitable for printing for each brand or type of the base material to be printed.

Further, as another aspect of the printing resin letterpress pasting device according to the present invention,
It is possible to adopt a configuration in which a recording unit is provided to updateably record the height from the adhesive surface of the printing resin letterpress to the bending neutral surface.

Further, as yet another aspect of the printing resin letterpress pasting device according to the present invention,
The calculation unit can adopt a configuration in which the optimum reduction ratio is calculated.

Further, as yet another aspect of the printing resin letterpress pasting device according to the present invention,
The calculation unit can adopt a configuration in which an appropriate tension value is calculated.

As described above, according to the printing resin letterpress pasting device according to the present invention, the influence of the slurred phenomenon can be suitably eliminated, and by extension, the printing machine using this printing resin letterpress has high accuracy and high quality. Printing becomes possible.

FIG. 1 is an explanatory view of a printing plate sleeve during printing. FIG. 2 is an explanatory view of a printing plate sleeve to which the cushion tape is attached without being compressed. FIG. 3A is an explanatory view of a flat state of the printing resin letterpress, and FIG. 3B is an explanatory view of a state in which the printing resin letterpress is bent and a bent neutral surface. FIG. 4 is an explanatory view of a letterpress sleeve in a state where a printing resin letterpress is attached. FIG. 5 is a front view of the pasting device. FIG. 6 is a side sectional view of the pasting device. FIG. 7 is an enlarged side sectional view of a main part of the pasting device, which mainly represents the plate thickness measuring device. FIG. 8 is an explanatory view of a pressing member that faces the table and sandwiches a part of the printing resin letterpress. FIG. 9 is an enlarged view of a main part of the pressing member. FIG. 10 is an enlarged side sectional view of a main part of the pasting device, which mainly represents the reflected light type displacement meter unit. FIG. 11 is an enlarged front view of a main part of the pasting device, which mainly represents a reflected light type displacement meter unit equipped with a confocal displacement meter. FIG. 12 is a flowchart showing the operation of the pasting device. FIG. 13 is an example of a camera image in which a specific image area is captured. FIG. 14 is a distribution diagram on the outer surface of the sleeve showing the thickness measurement results of the cushion tape and the resin letterpress for printing. FIG. 15 is a graph showing the relationship between the width, the thickness, and the tension of a certain brand of the substrate to be printed. FIG. 16 is an explanatory view of a state in which one row is attached when four rows of printing resin letterpress plates are attached to the sleeve. FIG. 17 is an explanatory view of a state in which two rows of printing resin letterpress plates are attached to the sleeve when four rows are attached. FIG. 18 is an explanatory view of a state in which three rows of printing resin letterpress plates are attached to the sleeve when four rows are attached. FIG. 19 is an explanatory view of a state in which four rows of printing resin letterpress plates are pasted on the sleeve. FIG. 20 is a schematic view of a attachment / detachment mechanism for a rayon roller provided with an electric actuator.

Hereinafter, an embodiment of the printing resin letterpress pasting apparatus according to the present invention will be described with reference to the drawings.

As shown in FIGS. 5 to 7, the pasting device 8 according to the present embodiment is a pasting device equipped with a rayon roller 10. In the case of a rayon roller operated by an air cylinder 16, a calculation unit that sequentially totals the plate widths on the sleeve 3 so that the pressing force is automatically adjusted according to the total width of the printing resin letterpress 5 on the sleeve 3. And an electropneumatic regulator 17 is provided to adjust the air pressure.

5 to 7 show a state in which one printing resin letterpress 5 is attached to almost the entire width of the sleeve 3. Then, the state in which the sleeve 3 with the cushion tape 4 attached is inserted into the mandrel 21 is shown. From this state, the printing resin letterpress 5 is placed on the table 11, and the position of the printing resin letterpress 5 is corrected while confirming that the printing resin letterpress 5 is in an appropriate position to be pasted by the enlarged image captured by the camera 15.

An elastic body such as rubber is wound around the outer circumference of the cylindrical body of the rayon roller 10. The rayon roller 10 operates and presses the printing resin letterpress 5 whose position has been corrected against the cushion tape 4 on the outer circumference of the sleeve. The rayon roller 10 can be moved to a position where it comes into pressure contact with the outer circumference of the sleeve 3 by the operation of the air cylinder 16. When the auxiliary table 29 is moved toward the front to widen the gap with the sleeve 3 and then the motor 19 is instructed to rotate while the rayon roller 10 is in pressure contact with the sleeve 3, the printing resin letterpress 5 is formed on the sleeve 3. Wrapped around the circumference. The pasting work is performed in this way. The camera 15 is attached to a left-right positioning device 24 that can be moved by a linear guide member 22 and a ball screw 23 so that the sticking device 8 can be moved and positioned in the left-right direction.

As shown in FIGS. 8 and 9, the table 11 includes a groove 37 having a suction hole 38 at the tip thereof. The suction hole 38 is connected to a suction pump (not shown) via an air tube 36, and the lower surface of the printing resin letterpress 5 is sucked by the suction hole 38 to hold the printing resin letterpress 5 flat on the table 11. can do.

The table 11 includes a pressing member 12. The pressing member 12 is rotatably supported by swinging members 40 provided at both ends of the table 11 so as not to damage the moving printing resin letterpress 5. The swinging member 40 is swingably supported by the holding member 39 around the pin 41. Even when the printing resin letterpress 5 has a portion that is not covered by the suction force, the pressing member 12 can be pressed from above the printing resin letterpress 5.

Returning to FIGS. 5 to 7, the pasting device 8 includes a plate thickness measuring device 32. The plate thickness measuring device 32 measures the thickness while the following roller 27 is in contact with the printing resin letterpress 5 and the printing resin letterpress 5 is wound around the outer circumference of the sleeve 3 and is moving. The follow-up roller 27 is rotatably supported by the interlocking member 26, and can be displaced up and down following the thickness of the printing resin letterpress 5. When the following roller 27 is displaced, the interlocking member 26 transmits the displacement to the displacement sensor 13 via the contactor 31 to measure the thickness of the printing resin letterpress 5.

The interlocking member 26 has a shape in which the rayon roller 10 is long-wound so that the following roller 27 can move to the vicinity of the tip of the table 11 and come into contact with the printing resin letterpress 5. Within the section of the printing resin letterpress 5 flattened by the pressing force of the rayon roller 10 and the suction force of the table 11, the following roller 27 comes into contact with the plate surface and is measured by free deformation of the printing resin letterpress 5. The plate thickness can be measured accurately without being affected by the error. When the measurement is completed, the elevating device 25 moves upward and retracts so as not to interfere with the attachment / detachment operation of the rayon roller 10. Further, since the table 11 is provided with the pressing member 12, the printing resin letterpress 5 having a warp is flattened even when the printing resin letterpress 5 is lifted at a place other than the suction hole 38 of the table 11. It is possible to ensure higher reliability in plate thickness measurement with the following roller 27.

Here, as a feature of the pasting device 8, the pasting device 8 has the following functions A) to F).
_{A) Function to measure the thickness (P t} -ΔP _t ) of the printing resin letterpress 5 B) Encoder 14 to detect the rotation angle of the mandrel 21
_{C) Function to measure the thickness (C t} -ΔC _t ) of the compressed cushion tape 4 D) Automatically outline the specific image areas A and B of the same shape of the printing resin letterpress 5 captured by the camera 15. Image processing means E) that has a geometric shape search function that recognizes the above and a position measurement function from the camera reference position to the points set in the specific image areas A and B. _{Angle θ 0} between the specific image areas A and B with the sleeve axis
2) Print repeat length set in the printing press P _rl-r
3) Predicted print repeat length as a print result P _rl-a
4) Optimal reduction rate δ _i
5) Tension value to achieve the original repeat length T _p
F) Recording means that can record and update the following items 1) and 2) 1) Width W and thickness M _t and appropriate tension T for each brand or type of substrate 6 to be printed.
2) Height h from the adhesive surface of the printing resin letterpress 5 to the bending neutral surface 9
As a result, the sticking device 8 has the thickness of the printing resin letterpress 5 (P _t -ΔP _t ) and the thickness of the stuck cushion tape 4 (C _t -ΔC _{t) at the stage of tailoring to the printing plate sleeve 20. ), And the minute distance ΔL pB} from the camera reference position to the point set in the specific image area B is measured.

The thickness of the printing resin letterpress 5 (P _t -ΔP _{t ), the minute distance ΔL pB} from the camera reference position to the point set in the specific image area B, and the thickness of the cushion tape 4 attached (P t -ΔP t). After measuring C _t -ΔC _{t ), the print repeat length P rl -a} is calculated after considering the elongation due to the tension of the substrate 6 to be printed. Then, the optimum reduction ratio δ _i that can reproduce the document repeat length A _{rl by printing and the tension value T p} for achieving the document repeat length are calculated.

Patent Document 2, Patent Document 3, and Patent Document 4 describe a method for measuring the deviation from the geometrically correct plate cylindrical surface of the surface of the printing resin letterpress 5 stuck on the printing plate sleeve 20. There is a means that has been done. In the means described in Patent Document 2, since the follower roll is brought into contact with the printing plate sleeve to measure the outer diameter of the printing plate sleeve, the image line convexity that cannot be measured unless the width of the follower roll is narrow. There is a problem with accuracy because the part remains and measurement omission occurs. Since the follower roll is measured in contact with the high image convex part, it cannot be contacted with the low image convex part and is not measured in the situation where the lower image convex part is mixed under the follower roll at the same time. A condition arises. Further, in the method of scanning with a non-contact sensor such as a camera described in Patent Documents 3 and 4, it is difficult to miniaturize the apparatus, and sufficient accuracy is obtained for processing the calculation intended by the present invention. There is a problem that it cannot be obtained.

By using a laser beam that enables narrower measurement, it is possible to overcome the above-mentioned problems and measure the deviation from the geometrically correct plate cylindrical surface of the surface of the printing resin letterpress with high accuracy. Can be done. However, since the resin letterpress for printing is translucent, in a general reflective laser displacement meter using red laser light, light enters and sinks inside the translucent body, and only the light reflected from the plate surface is emitted. It is difficult to distinguish and the plate surface cannot be recognized. The red laser light has a wavelength around 655 nm, and has the property that the light sinks inside the translucent body.

As a result of experimenting on the method of recognizing the surface of the resin letterpress for printing with laser light focusing on the wavelength characteristics, a blue laser light of about 405 nm, which has a shorter wavelength than the red laser light, or a laser light having a shorter wavelength band. Found to be valid. As a specific example, by using a blue laser light-reflecting laser microscope or confocal laser scanning microscope, the light reflected from the plate surface can be clearly identified even though the light that sinks inside the translucent body is mixed. It was found that the surface shape of the printing resin letterpress can be detected without contact.

Patent Document 6 describes a typical confocal displacement meter. Some confocal displacement meters use a white LED as a light source, but the wavelength band capable of emitting high-intensity light is narrow, and it is difficult to identify the surface of a translucent resin letterpress for printing. A confocal displacement meter that can achieve stable high-intensity emission in a wider wavelength band by irradiating a phosphor that emits red and green simultaneously with a blue laser has a sufficient amount of light in a wavelength band shorter than 405 nm. Can be secured, and the surface of the translucent printing resin letterpress can be identified. The confocal displacement meter shown in Patent Document 6 can measure displacement with high accuracy by allowing only light having a wavelength focused on the surface of the resin letterpress for printing to pass through the pinhole.

10 and 11 show the configuration of the reflected light type displacement meter unit 28. When the rayon roller 10 operates, the reflected light type displacement meter 42 retracts upward, and when measuring the thickness, the reflected light type displacement meter 42 is held by the elevating device 25 so as to lower it to a position suitable for the displacement measurement. .. The elevating device 25 is held by a left-right positioning device 24 that is movably supported in the direction of the mandrel rotation axis by a linear guide member 22 and a ball screw 23.

As the reflected light type displacement meter 42, a reflection type laser displacement meter or a confocal displacement meter 47 can be selected. When using a laser displacement meter that reflects red laser light, it is limited to the purpose of measuring _{the thickness of the cushion tape (C t} -ΔC _t). In that case, it is necessary to use a plate thickness measuring device 32 for measuring _{the thickness (P t −} ΔP _{t) of the printing resin letterpress 5.}

On the other hand, when the confocal displacement meter 47 is used as the reflected light type displacement meter 42, the total thickness including the thickness of the compressed cushion tape (C _t -ΔC _t ) and the printing resin letterpress 5 is added. (C _t -ΔC _t ) + (P _t -ΔP _t ) can be measured directly. Then, the deviation of the convex surface of the printing resin letterpress 5 from the geometrically correct plate cylindrical surface can be detected over the entire circumference of the letterpress sleeve 20. _{Further, the thickness (P t −} ΔP _t ) of the printing resin letterpress 5 can be indirectly measured by taking the difference between the two measured values without using the plate thickness measuring device 32 together.

Next, the flow of processing until the print repeat length P _{rl-a and the} like are calculated will be described with reference to FIG. First, the following items related to the work content are input to the control unit of the pasting device (S1).
Brand of base material 6 to be printed Brand of cushion tape 4 Brand of resin letterpress 5 for printing Number of sheets of resin letterpress 5 for printing to be pasted on sleeve 3 and reference coordinates for pasting each plate 5
T: Tension (force that pulls the substrate 6 to be printed 6 in the traveling direction during printing) [N]
M _t : Thickness of substrate 6 to be printed [mm]
W: Width of substrate 6 to be printed [mm]
E: Tensile elastic modulus of substrate 6 to be printed [MPa]
A _rl : Original repeat length [mm]
_Ar-2 : Distance on the document between two specific image areas A and B separated in the vertical direction [mm]
L _p-2 : Distance [mm] on the printing resin letterpress 5 when flat between two specific image areas A and B separated in the vertical direction [mm]
D _s : Outer diameter of sleeve 3 [mm]
C _t : Cushion tape 4 thickness (nominal value) [mm]
P _t : Thickness of resin letterpress 5 for printing (nominal value) [mm]
h: Height from the adhesive surface of the printing resin letterpress 5 to the bending neutral surface 9 [mm]

Next, after completing the preparatory work 1 to the preparatory work 4 (S2 to S4), the pasting operation is started (S5 to S7). In the middle of the pasting operation
P _t -ΔP _t : Measure the thickness of the printing resin letterpress 5 (S8). When using the reflected light type displacement meter unit 28 (S10 is Yes),
C _t -ΔC _t : Measure the thickness of the cushion tape 4 that has been pasted and compressed (S11).

The compressed thickness (Ct-ΔCt) of the cushion tape 4 is measured with reference to FIG. 4 as follows. First, a laser is radiated to the outer surface of the sleeve 3 to recognize it as a reference of zero thickness. Next, the reflected light type displacement meter 42 is moved to the right, stopped just before the end of the pasted printing resin letterpress 5, and the cushion tape 4 located in the lower layer of the printing resin letterpress 5 is compressed. Measure the thickness (C _{t -ΔC t} ). In this way, the measurement of the compressed thickness (C _t -ΔC _t ) of the cushion tape 4 scans both ends of the pasted printing resin letterpress 5, and the cushion begins to protrude from the printing resin letterpress 5. -Measure the thickness of the tape 4.

When the confocal displacement meter 47 is used as the reflected light type displacement meter 42, the thickness of the compressed cushion tape and the thickness of the printing resin letterpress can be measured. Therefore, when the confocal displacement meter 47 is used, (Ct-ΔCt) + (Pt-ΔPt) is measured (S12 in FIG. 12).

On the other hand, when the reflected light type displacement meter unit 28 is not used (S10 is No),
ΔL _pB : The distance from the camera reference position to the point set in the specific image area B is measured (S13 to S20), and the compression amount ΔC _t of the cushion tape 4 is calculated from Eq. (9) (S21).
ΔC _t = 0.5 {D _s +2 (C _t + h)} ΔL _pB / L _p-2

The camera 15 is a digital camera that uses a CCD (charge-coupled device) as an image pickup device, and converts an image into a digital signal and transmits the image to the image processing means. The image processing means has a geometric shape search function that automatically recognizes the outline of the captured image by specifying an arbitrary image portion in advance, and from the camera reference position to the point set in the image portion. It has a position measurement function. The geometry search function automatically analyzes the noise of the image and appropriately extracts the contour that a person imagines. In both cases, existing technology can be used for sufficient geometric shape search and position measurement.

Further, as an image portion generally specified, there is a register mark shown in FIG. 13, which is a mark used for registering at the time of multicolor printing. A register mark with a cross line in a circle is also called a dragonfly, and is a size consisting of a circle with a side of about 7 mm and a diameter of about 4 mm. are doing. In addition, points with a diameter of about 0.4 mm to 1.0 mm, called micro dots, are generally used. Normally, the center positions of these register marks are registered in the image processing means, and the mark positions are measured.

In FIG. 13, the vertical direction represents the rotation direction of the sleeve 3 measured by the encoder 14. The left-right direction represents the rotation axis direction of the mandrel 21. As shown by the dimension line, the center position of the mark is measured with reference to the center position of the camera. When measuring ΔL _pB , measure the amount of deviation in the vertical direction.

As the final step of the process flow until the print repeat length P _{rl-a and the} like are calculated, the following calculation is performed based on the measurement result (S22 in FIG. 12).
1) Print repeat length set in the printing machine: From equation (1)
P _rl-r = π {D _s +2 (C _t + P _t -ΔC _t -ΔP _t -I _mp )}
2) Print repeat length expected in the tension release state after printing: From equation (2), the predicted value _{of the print repeat length P rl-a after considering the elongation due to the tension of the substrate 6 to be printed is}
P _rl-a = π {D _s +2 (C _t + P _t -ΔC _t -ΔP _t -I _mp )} / {1 + T / (M _t・ W ・ E)}
3) Optimal reduction ratio δ _i : From equation (6), the optimum reduction ratio δ _i that can reproduce the original repeat length by printing is
δ _i = π {D _s +2 (C _t -ΔC _t + h)} / P _rl-a × 100
_{4) The tension value T p} for achieving the document repeat length is calculated by the following equation with _{P rl-a} = A _rl in equation (2).
T _p = [π {D _s +2 (C _t + P _t -ΔC _t -ΔP _t -I _mp )}-A _rl ] × (M _t・ W ・ E) / A _rl・ ・ ・ ・ ・ (10) )

FIG. 14 shows an example in which the measurement results of the total thickness of the cushion tape 4 and the printing resin letterpress 5 detected by the reflected light type displacement meter 42 are developed and displayed in a distribution format on the outer surface of the sleeve 3. The vertical axis indicates the rotation angle of the sleeve measured by the encoder 14. The horizontal axis represents the position of the left-right positioning device 24 that moves in the direction of the rotation axis of the mandrel 21.

In FIG. 14, as an easy-to-understand example, an example is taken in which the total thickness of the cushion tape 4 and the printing resin letterpress 5 is measured in an 8 × 5 region, which is divided into 8 in the vertical direction and 5 in the horizontal direction. The thickness measurement results of the compressed cushion tape 4 are displayed at both ends of the distribution map. The x mark indicates an area that has not been measured or has no image area. Below the distribution map, the calculation results of the print repeat length and reduction ratio are displayed. By transmitting information to the operator on such a screen, accurate instructions can be given from the pre-development process to the printing process, and the quality inspection result in the pasting process can be obtained.

_{FIG. 15 shows the relationship between the width W, the thickness M t,} and the tension T as a graph, taking the printed substrate 6 of a certain brand as an example. Generally, the tension T suitable for printing is expressed as a multidimensional polynomial of _{width W and thickness M t as shown in the following equation.} The elastic properties of the base material 6 to be printed differ depending on each brand. Actually, a database will be built and used for each brand.
T = (K _n M _t ⁿ + ・ ・ ・ + K ₄ M _t ⁴ + K ₃ M _t ³ + K ₂ M _t ² + K ₁ M _t ) W [N]
Here, K ₁ , K ₂ , K ₃ , K ₄ , ..., K _n are constants peculiar to the brand. The width W and thickness M _{t of the} base material 6 to be printed and the tension T suitable for printing are recorded in the recording means for each brand or type of the base material 6 to be printed, and the width W and thickness M _{t are updated.} It is possible to display the practical tension T suitable for printing and the calculated value of the practical print repeat length.

Here, as a method of pasting the printing resin letterpress 5 by the pasting device 8, other examples are shown in FIGS. 16 to 19. A wide cushion tape 4 is stuck on the sleeve 3, and a printing resin letterpress 5 is stuck on the sleeve 3 one row at a time. In the example of FIG. 16, the rayon roller 10 is pressed with a force corresponding to the width of 1/4 sheet, in the example of FIG. 17, it is pressed with a force corresponding to the width of 2/4 sheet, and in the example of FIG. It is pressed with a force corresponding to the width of 3/4 sheets, and in the example of FIG. 19, it is pressed with a force corresponding to the width of one sheet. Then, the cushion tape 4 has the same compression amount in each row, and there is no difference in the print length of each row. The width of the printing resin letterpress 5 is known from the instruction information of the pasting work, and it is possible to recognize how many rows of the printing resin letterpress 5 on the sleeve 3 have already been pasted. As a result, the control device calculates the air pressure corresponding to the total width of the printing resin letterpress 5 to the calculation unit, transmits the result to the electropneumatic regulator 34, and transmits the result to the electropneumatic regulator 34, and the air cylinder 16 for the rayon roller via the solenoid valve 35. The pressing force of the is automatically adjusted.

FIG. 20 shows, as another embodiment, a attachment / detachment mechanism for a rayon roller provided with an electric actuator 18. The piston rod 45 has a hollow cylindrical shape, and a ball screw (not shown) is mounted inside the piston rod 45. When the motor 46 rotates, the piston rod 45 linearly moves in the electric actuator main body 44 by the ball screw. The electric actuator 18 can push the piston rod 45 to a predetermined length and push the crushed amount of the rubber of the rayon roller 10 to a predetermined amount. Therefore, even if the width of the printing resin letterpress 5 changes, it can be pressed with the same amount of crushing.

The pasting device 8 according to the present embodiment has the above configuration, and according to the pasting device 8 according to the present embodiment, the following effects are exhibited.

In the pasting process, the thickness of the printing resin letterpress 5 (P _t -ΔP _t ) and the thickness of the cushion tape 4 after being pasted by the pasting device 8 (C _t -ΔC _t ) are to be grasped. _{Therefore, the predicted value P rl-a of} the print repeat length considering the elongation due to the printing tension, the print _{repeat length P rl-r} to be set in the printing machine, and the optimum reduction ratio that can reproduce the original repeat length A _{rl by printing.} δ _i can be calculated. Display Accordingly, the magnitude and temporal trends of error inherent in the print resin relief plate 5 having a thickness (P _t -ΔP _t) and attached incorporated the thickness of the cushion tape 4 (C _t -ΔC _t) respectively separately It is possible to make the calculated values consistent, and it is possible to instruct an appropriate reduction ratio as effective information for the next pre-development process. In addition, the tension value T _p for achieving the document repeat length can be calculated.

Further, according to the plate thickness measuring device 32, since only the plate thickness can be directly measured in a flat state, there is an advantage that the time-dependent change tendency and error distribution of the printing resin letterpress 5 by brand or by developing machine can be considered. There is. However, it cannot be denied that the range that can be measured by the plate thickness measuring device 32 is limited to approximately half of the rotation direction of the printing resin letterpress 5.

Further, by using the confocal displacement meter 47 for the reflected light type displacement meter unit 28, it is possible to scan the finished state of the printing plate sleeve 20 which has been pasted over the entire circumference, and the plate thickness measuring device 32 measures. Not only can the range that could not be measured be measured, but also the deviation of the resin letterpress convex surface 5 from the geometrically correct plate cylindrical surface can be detected over the entire circumference of the printing resin letterpress plate 5. Then, the optimum printing pressure and the print repeat length to be set in the printing machine control unit can be grasped from the result of observing the finished state, and the reliability can be improved. When the plate thickness measuring device 32 and the confocal displacement meter 47 are used together, the thickness of the cushion tape 4 and the thickness of the printing resin letterpress 5 can be grasped individually. Is important in that it can be considered in the most consistent state.

By printing using the printing pressure grasped by the above method and the print repeat length to be set in the printing machine control unit at the time of printing, waste during printing can be eliminated and printing without slur can be performed. If there is a difference between the original repeat length and the original repeat length, provisional measures can be taken by adjusting and printing with reference to the tension obtained from Eq. (10), but the thickness deviation ΔP _t and ΔC _t are planned. If the different tendencies continue, permanent measures can be taken by making a plate using the optimum reduction ratio obtained in Eq. (6).

Further, the relationship between the pressing force or pressing displacement of the rayon roller 10 and the compression amount ΔC _t of the cushion tape 4 is quantitatively clarified, and by controlling the pressing force of the rayon roller 10, the compression amount of the cushion tape 4 is controlled. ΔC _t can be managed to a predetermined value. Even when a plurality of printing resin letterpresses 5 are attached to one sleeve 3, they can be attached so that the compression amount of each cushion tape 4 is the same, and printing repeat in the attaching process. The length can be managed, and printing with the same printing length in each plate becomes possible.

Further, in the pasting device 8, the plate thickness reduction amount ΔP _t and the compression amount ΔC _t of the cushion tape 4 can be individually grasped, so that even when the stretchable flexible packaging material film is used as the printing base material 6. , The print repeat length can be reproduced so that it matches the original repeat length well, and the print repeat length to be set in the printing machine control unit can be known. Therefore, the concern about the occurrence of slurs caused by the finished diameter can be eliminated. .. Further, the compression amount ΔC _t of the cushion tape 4 can be controlled so as to approach the target value by the attachment / detachment mechanism for the rayon roller, and the variation in the printing length of each plate and the finished diameter become factors. The influence of slurs can be eliminated.

As described above, the flexographic rotary printing press using the plate-shaped printing resin letterpress 5 can be applied to printing with higher accuracy and quality. In addition, plate making can be performed at a reduced reduction ratio supported in the pre-development process, and printing waste can be reduced in the printing process.

In summary, according to the pasting device 8 according to the present embodiment, in the pasting step, the thickness of the printing resin letterpress 5 is directly or indirectly measured, and the cushion after being pasted by the pasting device 8. -By grasping the thickness of the tape 4, the predicted value of the print repeat length considering the elongation due to the printing tension on the substrate 6 to be printed, the print repeat length to be set in the printing machine control unit, and the original repeat length can be printed. The optimum reduction ratio that can be reproduced can be calculated. Then, the magnitude of the error inherent in the thickness of the printing resin letterpress 5 and the thickness of the attached cushion tape 4 and the tendency over time are displayed to make the calculated values consistent and effective in the pre-development process. It can be provided as information. In addition, the tension value for achieving the document repeat length can be calculated and presented. Further, by making it possible to quantitatively maintain and manage the relationship between the compression amount and the compressive force of the cushion tape 4 in the sticking device 8, it is possible to control the print repeat length in the sticking process. Then, when it is found that the print repeat length does not match the original repeat length, in order to clarify whether the problem is in the pre-development process, the development process, the pasting process, or the printing process. It can provide useful information. Further, by providing a means for measuring the deviation of the geometrically ideal cylinder of the outer diameter of the letterpress sleeve 20 to which the printing resin letterpress 5 has been attached, the optimum printing pressure and the printing repeat length are provided. It is possible to present highly reliable information regarding.

1 Sleeve-type rotary printing press 2 Plate cylinder 3 Sleeve 4 Cushion tape 5 Resin letterpress for printing (printing plate)
6 Base material to be printed 7 Impressor 8 Pasting device 9 Bending neutral surface of resin letterpress for printing 10 Rayon roller 11 Table 12 Pressing member 13 Displacement sensor 14 Encoder 15 Camera 16 Air cylinder 17 Electropneumatic regulator 18 Electric actuator 19 Motor 20 Printing plate sleeve 21 Mandrel 22 Linear guide member 23 Ball screw 24 Left and right positioning device 25 Lifting device 26 Interlocking member 27 Following roller 28 Reflected light type displacement meter unit 29 Auxiliary table 30 Retaining member 31 Actuator 32 Plate thickness measuring device 33 Ink supply Roller 34 Compressed air source 35 Electromagnetic valve 36 Air tube 37 Groove 38 Suction hole 39 Holding member 40 Swing member 41 Pin 42 Reflected light type displacement meter 43 Ray 44 Electric actuator body 45 Piston rod 46 Motor 47 Confocal displacement meter 48 Detachment mechanism 49 controller

Claims (12)

It is equipped with a table on which a resin letterpress for printing is placed and a mandrel that is inserted into a cylindrical sleeve and rotates the sleeve around the axis, and printing is performed on the sleeve with cushion tape attached to the outer peripheral surface while rotating. In the printing resin letterpress pasting device, which sticks the resin letterpress for printing
A plate thickness measuring device that measures the thickness of the printing resin letterpress placed on the table,
A left-right positioning device that can move in the direction of the mandrel's rotation axis,
A reflective laser displacement meter that measures the thickness of the cushion tape that is supported by the left and right positioning devices so as to face the mandrel and is attached to the outer peripheral surface of the sleeve.
A printing resin letterpress pasting device including a calculation unit that calculates the print repeat length based on the measurement result. It is equipped with a mandrel that is inserted into a cylindrical sleeve and rotates the sleeve around the axis, and an encoder that detects the rotation angle of the mandrel. In the printing resin letterpress pasting device, which sticks the printing resin letterpress
A left-right positioning device that can move in the direction of the mandrel's rotation axis,
A confocal displacement meter that measures the thickness of the cushion tape attached to the outer peripheral surface of the sleeve and the thickness of the resin letterpress for printing, which is supported by the left and right positioning devices so as to face the mandrel.
A printing resin letterpress pasting device including a calculation unit that outputs measurement results as a distribution on the outer peripheral surface of the sleeve. The printing resin letterpress pasting device according to claim 2, wherein the calculation unit calculates the print repeat length based on the measurement result. A table on which the printing resin letterpress is placed, an imaging unit that images the surface of the printing resin letterpress, a mandrel that is inserted into a cylindrical sleeve and rotates the sleeve around the axis, and an encoder that detects the rotation angle of the mandrel. In the printing resin letterpress pasting device, the printing resin letterpress is pasted on the sleeve while rotating the sleeve to which the cushion tape is pasted on the outer peripheral surface.
A plate thickness measuring device that measures the thickness of the printing resin letterpress placed on the table,
A geometric shape search function that automatically recognizes the contours of specific image areas of the same shape provided at at least two locations in the rotation direction of the printing resin letterpress imaged by the image pickup unit, and the image area is set to the image area from the reference position of the image pickup unit. An image processing means having a position measurement function up to the point
A printing resin letterpress pasting device including a calculation unit that calculates the print repeat length based on the measurement result. The printing resin letterpress according to any one of claims 1 to 4, further comprising a pressing member that abuts the printing resin letterpress on the table from above and presses the printing resin letterpress against the table surface. Included device. The plate thickness measuring device is
With the following roller,
An interlocking member that moves by pressing the follow-up roller against the printing resin letterpress to follow the thickness of the printing resin letterpress.
A displacement sensor that measures the displacement of the following roller,
The printing resin letterpress pasting device according to claim 5, further comprising an elevating device capable of moving a following roller on a table upper portion at an intermediate position between a vertical surface including a mandrel rotation axis and a pressing member. A detachable mechanism equipped with an air cylinder and
A rayon roller that is rotatably supported by a detachable mechanism so that it is parallel to the mandrel,
Solenoid valve and
Equipped with an electropneumatic regulator
The printing resin letterpress pasting device according to any one of claims 1 to 6, wherein the calculation unit automatically adjusts the air pressure according to the width of the printing resin letterpress on the sleeve. A detachable mechanism equipped with an electric actuator composed of a motor, a ball screw, a piston rod and a main body,
A rayon roller that is rotatably supported by a detachable mechanism so that it is parallel to the mandrel,
The printing resin letterpress pasting device according to any one of claims 1 to 6, further comprising a control unit for controlling the operation of the motor. The printing according to any one of claims 1 to 8, further comprising a recording unit for updatablely recording the width and thickness of the base material to be printed and the tension suitable for printing for each brand or type of the base material to be printed. Resin letterpress pasting device. The printing resin letterpress pasting device according to any one of claims 1 to 9, further comprising a recording unit that updatablely records the height from the adhesive surface to the bending neutral surface of the printing resin letterpress. .. The calculation unit is the printing resin letterpress pasting device according to any one of claims 1 to 10, which calculates the optimum reduction ratio. The printing resin letterpress pasting device according to any one of claims 1 to 11, wherein the calculation unit calculates an appropriate tension value.

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