EP2566695A1 - Method and apparatus for determining and setting an optimized operating distance between at least two cylinders involved in a printing process - Google Patents
Method and apparatus for determining and setting an optimized operating distance between at least two cylinders involved in a printing processInfo
- Publication number
- EP2566695A1 EP2566695A1 EP11717678A EP11717678A EP2566695A1 EP 2566695 A1 EP2566695 A1 EP 2566695A1 EP 11717678 A EP11717678 A EP 11717678A EP 11717678 A EP11717678 A EP 11717678A EP 2566695 A1 EP2566695 A1 EP 2566695A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinders
- cylinder
- color
- change
- color film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000012546 transfer Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000007774 anilox coating Methods 0.000 claims description 74
- 238000005259 measurement Methods 0.000 claims description 38
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F3/00—Cylinder presses, i.e. presses essentially comprising at least one cylinder co-operating with at least one flat type-bed
- B41F3/46—Details
- B41F3/58—Driving, synchronising, or control gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
- B41F31/32—Lifting or adjusting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/10—Forme cylinders
- B41F13/12—Registering devices
- B41F13/14—Registering devices with means for displacing the cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
- B41F31/301—Devices for tripping and adjusting form rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0063—Devices for measuring the thickness of liquid films on rollers or cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/20—Rotary letterpress machines specially adapted for proof printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
Definitions
- the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 25. With such devices and methods, the distance between at least two cylinders involved in the printing process of a printing unit is set.
- DE 44 27 967 B4 should be assigned to the offset printing process.
- EP 1 249 346 B1 proposes, inter alia, to observe the printed image of the printing press on the printing substrate when adjusting the rollers with optical sensors. On the basis of the measured values, a control device determines the optimized relative position of the rollers involved in the printing process and adjusts them. Since according to this teaching, the measurement of the - still faulty - print image on the substrate is the basis for the adjustment of the printing roller position, waste is inevitably generated during the adjustment of the roller position. This fact is criticized by EP 1 916 102 A1.
- this document proposes to measure the diameter of format cylinders. Due to the measurement results obtained on the format cylinder, a control device determines the optimized relative position of the format cylinder to the other cylinders involved in the printing process. Based on these values, the control device of the printing press adjusts the position of the format cylinder in the printing press. In this way should be printed wastepaper.
- DE 102 1 1 870 A1 Another document which deals with the optimization of the ink transfer of rolls involved in the printing process in the offset printing process, DE 102 1 1 870 A1, which proposes, rollers that transfer color in the printing process, at a standstill (no rotation about the main axis of symmetry) to each other to drive. If the color transport direction of the first of the two rollers is colored at the moment of the mutual adjustment, a color strip is formed on the second roller. This color band becomes clearer when the two rollers touch each other for a while at a standstill.
- This color strip can be measured inter alia with a CCD camera after the second roller has been rotated by an angle from the contact position to a position in which the resulting color strip can be viewed.
- the width of the color strip is a measure of the pressure between the rollers, so that at a certain width of the right pressure can be assumed. If the strip has a right-angled shape (same width), the main axes of symmetry of the two rolls run parallel.
- the present invention is based on the latter document. Its task is to remedy the aforementioned disadvantages of the same.
- the object is solved by the characterizing features of claims 1 and 25.
- the change in the color film may consist of a decrease in the color transported by the cylinder in question. However, even without such a decrease in color, it may happen that the surface of the color film changes as a result of a contact pressure. Further details of the phenomena mentioned are discussed above all in the present description.
- a basic idea of the present invention is therefore to detect the change of the color film on a color-transferring cylinder.
- the measurement is performed on at least one cylinder, which in the color transport direction (23) is preceded by the second color-receiving cylinder (7) during the printing process.
- the position between the anilox roll and the format cylinder can be optimized on the basis of the observation of the anilox roll without waste being produced.
- An employment of the well-positioned roll stack anilox roller / form cylinder against the impression cylinder can then be made under the production of waste paper.
- color streaks which have formed due to the lack of ink removal on the printing material, disappear.
- the relative position of the two cylinders which are already set against each other - in this case the anilox roller and the format cylinder - should advantageously not change during the adjustment to the counter-pressure cylinder.
- an impression cylinder which carries printing material on its surface, so that the printing material is transferred in the printing operation color in the sense of this document is a color-receiving cylinder.
- the above-mentioned method for optimizing the printing cylinder positions according to DE 102 1 1 870 A1 entails a high expenditure of time since, as mentioned, the cylinders have to be stopped for a certain period of time so that the color stripe is formed on the second cylinder.
- the cylinders can rotate continuously. It is advantageous to carry out at least one continuous rotation (360 ° about the main axis of symmetry), at least two or more such rotations. In a part of the method according to the invention, the cylinders rotate during the entire measurement or keystroke.
- the setting of the roll spacing will be made on the basis of the measured values on the basis of a control device set up for this purpose.
- the control devices will usually be charged with a corresponding computer program. Ever is It is advantageous to carry out or support all methods according to the invention in this way computer-implemented.
- the method is advantageous.
- the color decrease of the gravure cylinder - so the printing plate cylinder - are measured.
- the impression roller or general impression cylinder is in this case involved in the printing process, but does not participate in the color transport to the substrate or in the printing nip.
- the process has its advantages in two rolls as well as in a color transport over several cylinders and a measurement of the ink film on one of the front rollers.
- the covering of the surface of the roller with color also changes in the last-mentioned case, when the rollers in the color transporting direction are turned against the following roller or the printing material and ink is actually transported onto the printing material.
- roller and cylinder in this document are used interchangeably or equivalently.
- measuring travel is understood to mean the phase of the approach of the rollers, in which measured values are obtained which are used to determine a first optimized relative position.
- the further measurement of the color transfer can be terminated.
- a further approach can be carried out - if necessary - by the control device.
- an alignment of the cylinders relative to each other by an empirically or computationally determined offset value-that is to say a further approximation of the cylinders by a distance-can be brought about by the control device after reaching this "kiss print point" or here a first optimized relative position can then be an optimized working distance between the cylinders in question, which is just not usually given when reaching a kiss print point, can be achieved.
- Another way to determine an optimized Druckbeistellsituation is to follow the course of color reduction as a function of relative roll position. Then, if a characteristic course of this function occurs, it is possible, based on experience and calculations, to assume that the optimized relative pressure position of the cylinders has been reached. Thus, the achievement of the optimized printing position of the cylinder is often early on, since the color transfer after Reaching this position barely increases, but on further approach of the rollers enters a saturation region. Due to these facts, the function in question often has inflection points or relative maxima in the area of the optimized printing position. Characteristic points of this kind can be used by the control device to determine the optimized printing position.
- an optimized relative print position is a "secondary threshold” (ie, a further amount of color decrease) or an “offset value” (ie, a certain amount of travel) away from such a characteristic point. If the course of the function is recorded far enough to calculate the position of such points, the test drive can also be ended here.
- Process steps such as recording the function change of the color film / relative roller position, ending the test drive, finding one or more characteristic points of this function, switching on a threshold value and / or offset value can be carried out computer-implemented by the control device.
- this also applies to the other methods presented in this document.
- the offset values and the secondary threshold values can be used in connection with all presented methods which determine the duration of the measuring run.
- the sign of the offset values ("more or less provision") or of the secondary threshold values (more or less color transfer) can be positive or negative in this case.It is advantageous to determine the area of the cylinder or roll on which the measurements are taken. As a rule, therefore, the maximum measuring range of the sensor device will be based on the maximum pressure range (often equal to or slightly larger).
- One way to realize this is to use a This camera is suspended in a working position, in which it can cover the printing area of the machine, to the cylinder concerned It makes sense to divide the entire measuring range of the sensor system into partial areas can be modular - z. B. from photodiodes. In this case, the modules of the sensor system will already provide partial images of the entire measuring range, which then no longer needs to be decomposed by a computer unit into subareas.
- the optimized Anstellsituation should advantageously be considered achieved when the conditions of the respective method are achieved in a subset of the sub-areas.
- optical sensors such as cameras in question.
- optical sensors and cameras is used in this context, even if non-visible electromagnetic radiation can be recorded.
- the spectral light intensity is an advantageous measured variable (light intensity per spectral range per area).
- the sensors then measure the remitted radiation.
- the laws of reflection are generally to be observed (which is shown inter alia in the figures).
- a device for determining an optimized working distance between two cylinders involved in the printing process may be a printing unit of special equipment or it may be an external drawing from the perspective of the printing press with corresponding additional features. These devices have in common that recordings in which the printing cylinder are rotatably mounted and against each other are available, are present.
- the preparation of the printing plate cylinder on the printing can be carried out in an external stretching unit.
- a bar may additionally be provided with device features inherent to so-called stands, which are typically used for the armor of flexographic printing format cylinders.
- stands which are typically used for the armor of flexographic printing format cylinders.
- stretching devices have become known in which a format cylinder is also rotatably mounted.
- this cylinder is provided with a smooth yet completely unprocessed rubber-like cliché, which is processed by a laser ablation unit such that forms the desired printing form.
- a device according to the invention can also be equipped with such a laser ablation unit or another engraving unit for processing the cliché.
- Such a unit is shown in WO 9713641.
- the invention is realized in an external unit, then it is not even necessary to actually set the finally held for optimal relative distance between the cylinders involved in the external unit. Rather, it is then necessary to pass on the determined data to the actual printing press, which then also sets these values.
- all known communication possibilities between the devices as well as storage in the relevant cylinders eg RFID with possibility of reading out in the printing press
- the device components which are regular in an inking unit, but which are usually absent in an external tray, include a coloring device.
- a coloring device may be rudimentary. It can also be loaded with a special test color.
- Such a text color may be similar Color split properties but have different optical properties ("easier to measure”) than the actual color.
- the quality of the color film on a roller - in the drawing unit or in the inking unit - can also be determined by capacitive sensors.
- capacitive sensors it is easy to see that the thickness of the ink film on the surface of the measured roll influences the capacitive measurement.
- an uneven structure of a color film should also play a role here.
- the development of the ink film on the roller can also be observed during the printing operation.
- dynamic changes in the pressure conditions can be detected with respect to the printing operation. It can be responded to these changes in the current printing operation (eg by other adjustment of the rollers or by changing the viscosity of the ink).
- the change in the color film on the at least one color-transporting cylinder can be carried out with the roller rotating.
- the measurement can take place while the cylinders - or the cylinders whose relative position is being optimized - are set against each other in the vicinity of their kissprint point and, if necessary, during a measuring run to find an optimized printing position. Moving the rollers apart to perform the measurement is usually unnecessary.
- sensors are shown, which are mounted in a working or measuring position to a color-transporting roller. With optical sensors - cameras - radiation sources are often provided. It has been shown that measurements on the ink-transporting rolls, which are possible with the sensors shown, also allow other variables or phenomena relevant to the printing process to be measured or determined. These are explained below in relation to the observation of a flexographic printing plate roller: Evaluation of the negative image
- the quality of the coloring of the anilox roller - which is usually carried out by a doctoring chamber - can be monitored before or during the printing process. This is very important because it still happens that there is little or no color on the roller, which of course negatively affects the printed image.
- dry-running rollers of all kinds can also cause inflammations and explosions in printing presses, so that the detection of the dry roller can be used for "explosion protection" (eg pressure abort or warning signal).
- Paint deposits which can lead to so-called ghosting, or squeegee strips, which can come about by an over-hired and / or vibrating doctor blade on the surface of the anilox roller can be detected with the sensors.
- the doctor blade offers an adjustment of the doctor blade. strips on the anilox roller can also be caused by vibrations in the inking unit. Such vibrations often lead to very regular thickness variations of the ink film on the roller.
- register marks which are also displayed in the negative image, can also register or vorreg ist proceedings the print image-bearing cylinder - in flexographic printing of the format cylinder - to the print image-bearing cylinder at least one further inking unit be made.
- the significant point or the mark on the surface of the anilox roller is detected at a time and the angular position of the anilox roller at this time z. B. recorded with a rotary encoder.
- a significant point or mark on the surface of the anilox roll of the further inking unit must then be brought into a suitable relative angular position. This circumstance would also be checked with an optical sensor and a rotary encoder. This method would, for example, enable a scratch-free pre-register.
- the above methods can be advantageously combined with the methods for adjusting the relative position of the at least two rollers involved in the printing process. Both types of methods have surprising advantages when performed by measurements on cylinders having uneven surfaces, such as anilox rolls, form cylinders, or form cylinders.
- Fig. 1 is athesessskizze a first
- Fig. 2 is a functional diagram of a second
- Fig. 3 is a functional diagram of a third
- Fig. 4 is a schematic sectional view of the inking unit 5 of the third
- Fig. 5 is a functional diagram of a fourth
- FIG. 6 shows a first detail from FIG. 8
- FIG. 7 shows a second detail from FIG. 8
- Fig. 8 is a sketch of an anilox roller and a sensor system
- FIG. 9 shows a second view of the sensor system from FIG. 8
- FIG. 1 1 An illustration of a second measuring method
- FIG. 13 An illustration of a third measuring method
- FIG. 14 An illustration of a fourth measuring method
- Fig. 15 An anilox roller and a camera
- Fig. 16 is another anilox roller and a camera
- Fig. 17 is an enlargement of the surface of an anilox roller 7 in the
- FIG. 18 The sectional view from FIG. 17 with empty wells 30
- FIG. 19 A further enlargement of the surface of an anilox roller 7 in the sectional view
- FIG. 20 The sectional view from FIG. 19 with empty wells 30
- Fig. 21 is a sketch of an anilox roller 7, by a movable
- FIG. 22 The sketch of Figure 21, wherein a format cylinder to the
- Function of the roller rotation angle ⁇ Fig. 1 is a schematic diagram of a Monzylinderflexodruckmaschine 15, in which the printing units or inking units 2, 3, 4 and 5 are arranged around the central impression cylinder 1 around.
- the inking units 2, 3 and 4 are shown only with dashed lines, since a closer look at the inking unit 5 is sufficient at this point.
- the squeegee chamber 6 transmits ink to the surface of the anilox roller 7.
- This 7 transports the color by its rotation on to the format cylinder 8.
- the format cylinder 8 carries the raised cliché 1 1, the color of the surface of the anilox roller 7 decreases.
- On the surface of the anilox roller 7 therefore forms in the contact region 10 between the plate 1 1 of the format cylinder 8 and the anilox roller 7, a zone in which color loss occurs.
- This ink loss is to be measured in a printing press 15, as shown in FIG. 1, before the contact region 10 again reaches the doctoring chamber 6 by the rotation of the anilox roller 7.
- more accurate measurements may require measuring the color loss per unit area. If this is to happen quickly and during a keystroke, a measurement with rotating roller 7 is advantageous.
- FIG. 2 shows a sketch largely identical to FIG. 1, in which the same reference numerals also designate the same features.
- the line camera 17, whose width corresponds to the maximum printing width, has been added.
- the camera is modular. It consists of the modules 18 in which photodiodes can accommodate portions of the anilox roller 7. In the sketched working situation of the printing press 15, only the middle modules 18 of the camera 17 are activated. Already these modules are able to completely or partially scan the contact area 10 of the surface of the anilox roller 7 with the cliché 1 1, when this area 10 passes by the rotation of the anilox roller 7 on the camera 17.
- FIG. 3 again shows a printing machine 15 constructed in the same way in principle.
- the camera 19 following in the direction of rotation 14 of the screen roller 7 of the doctoring chamber 6 can be seen. With this camera, the quality of the coloring of the anilox roller 7 can be controlled by the doctor chamber 6.
- FIG. 4 shows a further advantageous embodiment of the method.
- the working distance is set between a first group of cylinders 1, 7, 8 involved in the printing process, the first group having a first number N of cylinders and the first number being at least three,
- the working distance between a second group of cylinders 7, 8 involved in the printing process is set on the basis of measured values concerning the change of the color film on at least one of the two cylinders, the second group being a subset of the first group, the second group being a second group Number M of cylinders and the second number M is at least two,
- the working distance between a third group of cylinders 1, 8 involved in the printing process is set on the basis of measured values which are obtained in a different way than the measured values for adjusting the working distance between the cylinders of the second group of cylinders involved in the printing process;
- third group is a subset of the first group, the third group has a third number O of cylinders and the third number O is at least two.
- the first group of cylinders involved in the printing process consists of the impression cylinder 1, the format cylinder 8 and the anilox roller 7. It is advantageous to form the second group from the format cylinder 8 and the anilox roller 7. If these two cylinders are turned against each other as they rotate, no waste is still generated.
- the third group can then be formed from the impression cylinder 9 and the format cylinder 8. With these two cylinders, setting the optimized print position can be done in a different way to save waste.
- FIG. 5 again shows the printing machine 15 in a similar manner to FIGS. 1 to 3. However, this time instead of the line camera 17 in the inking unit 5, the movable camera 24 is shown. It is movable along a rail, not shown, in the axial direction of the anilox roller 7. This is shown by the arrows 25.
- the camera shown in FIG. 5 can only cover partial areas of the contact surface 10 between the cylinders 7 and 8 at one time. It would also be possible to provide a plurality of such movable cameras 24 or to attach one or more cameras, which can cover only smaller portions of the area, stationary.
- sensors such as reflection sensors or light scanners, which are already being used as register sensors in series printing machines, come into question.
- These sensors have optical fibers (typically glass fiber based) that both direct light to the viewing area and derive the light returned from the roll surface (usually after being collected by a lens or the like) for measurement. Thanks to the light guides, both the radiation source and the analysis unit are in a roughly installed position at a distance from the measuring point.
- the mentioned sensors are to be acquired as highly integrated (among others mechanically loadable and relatively insensitive to chemical influences) components.
- FIG. 9 again shows the line camera 17 composed of the modules 18, which is arranged upstream of the doctoring chamber 6 in the direction of rotation of the anilox roller 7 in FIG.
- the orientation in the z direction also corresponds to the symbol of the line camera 17 (dashed rectangle) in FIG. 8.
- FIG. 8 shows the alignment of the line scan camera 17 with the anilox roller 7.
- Two portions of the camera 27 and 28, which are detected by a respective camera module 18, are highlighted by dashed circles.
- the portion 27 is located at an end edge of the anilox roller 7 and is provided with an unimpaired ink film 22 during operation of the printing press.
- the sub-area 28 belongs to the touch area 10. The consequences of these circumstances are shown in FIGS. 6 and 7, which represent magnifications of the sub-area 28 (FIG. 6) and 27 (FIG. 7).
- the wells 30 of the anilox roller 7 are filled with color 29.
- FIGS. 10 to 14 illustrate how the intensity of a camera 17, 24 changes as a function of the working distance.
- they are usually approximated - with largely parallel roll axes.
- the distance of the rollers changes in their radial direction r.
- there is an increase in the value x for this approach in the radial direction since the block of one roller is moved in the direction of the other roller.
- the relative position of the two rollers can also be changed in other ways.
- the exemplary embodiment shown in FIG. 10 is based on a measurement of the light remitted by the ink-transporting roller or on the measurement of the intensity I of this light.
- the light intensity values which result as a function of the approach of the rolls are measured, the light intensity does not change. There is still no contact.
- the light intensity does not change. There is still no contact.
- Upon reaching a very early kissprint point 31 begins a color transfer, which can be measured from the point 37 of the sensor system, since the decrease in the light intensity I is already greater than that here Measuring tolerance 35 of the sensor system.
- the measuring travel ends 32 that is, one takes in this example the relative position reached at point 37 as the first optimized relative position of the two rollers.
- an optimized working distance 38 can already be achieved here. As a rule, however, more will have to be done to achieve an acceptable optimized working distance 38.
- the size of this leg may be based on calculations or empirics.
- offset 34 is an approximation of the rollers by a distance amount. This can be controlled by the machine control and, if necessary, measured by position sensors such as encoders in spindle motors. If a threshold 33 (at light intensity I) is given, the distance between the rollers (by changing x) is changed until the threshold value is reached. This results in an adjustment amount 39 to the threshold value 33.
- FIGS. 13 and 14 show the course of the light intensity as a function of the approach over a broader range:
- the light intensity is initially at a maximum 42. After leaving this maximum (this begins at point 31, as already shown), the graph 45 often assumes a very characteristic course 46, until he reached his minimum 43. Within this range, characteristic points 44 can be determined (such as turning points or local maxima) from which statements can be made about the position of an optimized working position of the two rolls.
- FIG. 13 shows a situation in which the measuring run is carried out until an optimized printing position is reached.
- the control device can calculate or estimate the further curve range. She considers no further employment necessary and terminates both the measuring drive and the setting process. Often it will even be possible, in this method (optimization of the relative roll position based on the evaluation of the characteristic curve of the function 45) to end the measuring run very early and to achieve the optimized roll position by means of an offset 34.
- FIG. 14 shows an exemplary embodiment in which the measuring travel 32 lasts until the minimum 41 is reached. Then, the rollers are further spaced by a calculated value 47 to set the optimized working distance 38.
- the measured value was exclusively the light intensity I.
- the area coverage per unit area can be measured while the roller is running, that is to say rotating.
- FIG. 15 shows an anilox roller 7 whose surface is irradiated by a radiation source 48 with incident radiation 49.
- the radiation is remitted from the surface of the anilox roller 7.
- the remitted radiation 50 is more diffuse than the incident radiation 49.
- the anilox roller 7, the radiation source 48 and the camera 24 are positioned relative to each other such that a majority of the remitted radiation falls into the camera 24. As a rule, this circumstance is ensured by the relationship of angle of incidence (to the relevant roll surface) equal to the angle of reflection.
- FIG. 16 While the image plane of Figure 15 is spanned by the axial (z) and radial (r) coordinates of the roller 7, the image plane of Figure 16 is spanned by the circumferential ( ⁇ ) and radial coordinates (r).
- the anilox roller 7 in FIG. 16 is thus rotated by 90 ° with respect to the anilox roller in FIG.
- the radiation source 48 and the camera 24 are positioned differently to the anilox roller.
- Figures 17 and 18 show an enlargement of a section of the surface of an anilox roller 7.
- the wells 30 of the anilox roller surface are filled to the edge with color 29.
- the wells are largely emptied of color 29. 17 shows the consequences of this circumstance.
- the remission is less diffuse than in FIG. 18, so that in FIG. 17 more light is introduced into the converging lens 51 and thus into the camera lens 24 Camera 24 drops.
- the light sources 48 in FIGS. 17 and 18 are associated with lenses 51.
- FIGS. 19 and 20 likewise show enlarged sections of the anilox roller surface, with FIG. 19 showing cells 29 filled with ink 29, while the cells in FIG. 20 are substantially emptied.
- the broader course of the radiation intensity lobe in FIG. 20 illustrates the consequences:
- the light 50 remitted by the anilox roller 7 is scattered more strongly in FIG. 20 than in FIG. 19, so that in FIG. 20 less light intensity - or fewer photons - arrive in the converging lens 51.
- This drop in intensity makes it clear that an adjustment of the anilox roller 7 to another roller - such as a format cylinder - has taken place.
- Such a change of the surface can exist, for example, in a "desaturation" of the same - ie in an increase in their "roughness” - that is, actually unevenness. Even with such a result, there is a greater scattering of the remitted radiation, so that a first contact between rollers 1, 7, 8 involved in the printing process can be detected.
- such a first contact between the rollers may also cause ink to be displaced from the surface of the roller into cups 30, spaces between raised portions of the print image, or other lower areas of the roller surface without transfer of ink to another cylinder. usually called color fission - takes place.
- color fission - takes place.
- the reflection behavior of the roll surface can change significantly.
- the color disappears from the higher areas of the roll surface, so that they are no longer covered by a smooth layer of paint.
- the generally irregular raised elements of the roll surface webs often webs between the wells 30 in the case of anilox rollers, pressure sensitive areas in the case of format cylinders 8) prevent a uniform direct reflection and thus contribute to producing more diffuse or non-directionally reflected light in the incident radiation 50.
- an increase in color as a result of contact between rollers involved in the printing process can be measured. This may be the case, for example, when the increase in color is measured on a format cylinder 8 against which an already engraved anilox roll is placed.
- Measured acceptance of the intensity I of the reflected light 50 - then what has been said with reference to FIGS. 10 to 14, the intensity increases as a result of the approach of the rollers and does not decrease. If the color-transferring cylinder 8 dyed in this way is in turn attached to a further not yet inked cylinder 1 and / or to the printing material 9 (see, for example, FIG. 4), then again a change in the color film and therefore
- the measurement of the change in the color film can be measured while the rollers are still set against each other.
- FIG. 21 is similar in so far as FIG. 5 is shown as an anilox roller 7 which is scanned by a movable camera. However, it is indicated in FIG. 21 that the camera 24 scans the roller at a point in time since it is already dyed with a color film 22 at the points which ever roll with the format cylinder 8 - as the second cylinder to which the anilox roller transfers color can. However, an employment of the anilox roller 7 and the format cylinder 8 against each other has not yet taken place, so that the camera scans an uninfluenced ink film 22 in the region of its scanning regions 53 which follow one another in the direction of rotation .phi. This happens when the anilox roller 7 rotates so that the camera 24 records a reference curve R (FIG. 23).
- This reference curve R indicates here the course of the intensity I of the light remitted by the anilox roller as a function of the angle of rotation ⁇ of the roller 7. It is advantageous if the color film 22 is complete, that is, it corresponds to the color film 22 in the printing operation. In FIG. 22, a first adjustment (which has led to a contact) has already taken place between the anilox roller 7 and the format cylinder 8, and a color loss can be seen in the contact region 10 between the cliché 22 and the anilox roller surface.
- the ordinate is designated -I.
- This measure takes into account the fact that as a result of the color removal and / or the degradation of the color film in the contact region 10, a significant decrease in the intensity of the remitted light occurs, at least in a specific spectral range.
- the sensors 17, 19, 24 shown in the figures are swung out of the area of the inking unit after the roller has been scanned. In this case, the sensitive sensors are no longer polluted in the further printing operation.
- a cleaning can take place, which can be carried out for example by a dedicated cleaning device. In this position, a recalibration of the sensor can be made.
- the spectral sensitivity ranges of the sensors can be adjusted by filters and / or by applying a different countervoltage to the semiconductor diodes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Rotary Presses (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14157875.7A EP2759407B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders involved in a printing process |
EP11717678.4A EP2566695B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders of a printing unit involved in the printing process |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10162344A EP2384892A1 (en) | 2010-05-07 | 2010-05-07 | Method for setting and device for determining an optimal operating distance between at least two cylinders of a printing unit involved in the printing process |
EP11717678.4A EP2566695B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders of a printing unit involved in the printing process |
PCT/EP2011/057417 WO2011138466A1 (en) | 2010-05-07 | 2011-05-09 | Method and apparatus for determining and setting an optimized operating distance between at least two cylinders involved in a printing process |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14157875.7A Division-Into EP2759407B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders involved in a printing process |
EP14157875.7A Division EP2759407B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders involved in a printing process |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2566695A1 true EP2566695A1 (en) | 2013-03-13 |
EP2566695B1 EP2566695B1 (en) | 2014-04-16 |
Family
ID=42797494
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10162344A Withdrawn EP2384892A1 (en) | 2010-05-07 | 2010-05-07 | Method for setting and device for determining an optimal operating distance between at least two cylinders of a printing unit involved in the printing process |
EP14157875.7A Active EP2759407B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders involved in a printing process |
EP11717678.4A Active EP2566695B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders of a printing unit involved in the printing process |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10162344A Withdrawn EP2384892A1 (en) | 2010-05-07 | 2010-05-07 | Method for setting and device for determining an optimal operating distance between at least two cylinders of a printing unit involved in the printing process |
EP14157875.7A Active EP2759407B1 (en) | 2010-05-07 | 2011-05-09 | Method for setting and device for determining an optimal operating distance between at least two cylinders involved in a printing process |
Country Status (4)
Country | Link |
---|---|
US (2) | US20130291749A1 (en) |
EP (3) | EP2384892A1 (en) |
ES (2) | ES2595256T3 (en) |
WO (1) | WO2011138466A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011086047A1 (en) | 2011-11-09 | 2013-05-16 | Windmöller & Hölscher Kg | Method for adjusting the distances between cylinders of an inking unit and printing machine |
DE102012111651A1 (en) * | 2012-11-30 | 2014-06-05 | Bundesdruckerei Gmbh | Method and device for checking the completeness of an order from a transparent layer of a medium on a carrier material |
DE102014101433B4 (en) * | 2014-02-05 | 2016-03-24 | CONPRINTA GmbH & Co. KG | Printing unit for a flexographic printing machine and method for its operation |
BR112016021716B1 (en) | 2014-03-21 | 2022-02-15 | Bobst Firenze S.R.L. | DEVICE FOR CONTINUOUSLY DETECTING AND ADJUSTING PRINTING PARAMETERS ON A FLEXOGRAPHIC PRINTING MACHINE AND METHOD FOR DETECTING AND ADJUSTING PRINT DENSITY AND COLORIMETRIC PARAMETERS ON A FLEXOGRAPHIC PRINTING MACHINE |
DE102015108126A1 (en) * | 2015-05-22 | 2016-11-24 | Windmöller & Hölscher Kg | Printing machine and method for employment of several inking units of a printing press |
ITUA20162391A1 (en) | 2016-04-07 | 2017-10-07 | Bobst Firenze S R L | MECHANICAL CYLINDER AND METHOD FOR CONTROL AND ADJUSTMENT OF PRINT PARAMETERS IN PRINTING MACHINES |
DK3439882T3 (en) | 2016-04-07 | 2020-03-23 | Bobst Firenze S R L | A DEVICE AND PROCEDURE FOR HEATING AN ANILOX BY INDUCTION IN PRINTING MACHINES |
DE102019111804A1 (en) * | 2019-05-07 | 2020-11-12 | Koenig & Bauer Ag | Method for setting and / or changing an ink transfer, printing unit and printing machine with a printing unit |
JP7060767B2 (en) | 2019-02-05 | 2022-04-26 | ケーニッヒ ウント バウアー アー・ゲー | How to Adjust and / or Change Ink Transfers in Intaglio Printing Equipment and Intaglio Printing Methods |
CN113710486B (en) * | 2019-05-07 | 2022-08-12 | 柯尼格及包尔公开股份有限公司 | Intaglio printing device and method for checking, adjusting and correcting relative positions |
DE102021125382A1 (en) | 2020-10-22 | 2022-04-28 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for measuring a surface, or its elevations, a body of revolution and system |
DE102021125336A1 (en) * | 2020-10-22 | 2022-04-28 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for measuring elevations on the surface of a body of revolution and system |
CN112967991B (en) * | 2020-11-25 | 2022-10-21 | 重庆康佳光电技术研究院有限公司 | Transfer device, system and method |
CN112693215A (en) * | 2020-12-21 | 2021-04-23 | 佛山佛塑科技集团股份有限公司 | Flexible printing coding machine |
CN113370642A (en) * | 2021-06-08 | 2021-09-10 | 安徽天翔高新特种包装材料集团有限公司 | Intaglio printing press with mobile carriage supporting ink-collecting cylinder |
CN113763463B (en) * | 2021-11-10 | 2022-02-11 | 风脉能源(武汉)股份有限公司 | Method for determining position of acquisition equipment based on image data processing |
DE102022101244A1 (en) | 2022-01-20 | 2023-07-20 | Koenig & Bauer Ag | Process for calibrating color metering elements |
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US4852486A (en) * | 1988-11-25 | 1989-08-01 | Basf Corporation | Portable flexographic proofer device |
US5132911A (en) | 1989-12-27 | 1992-07-21 | Leader Engineering Fabrication, Inc. | Apparatus for mounting and proofing printing plates |
JP2903634B2 (en) * | 1990-05-22 | 1999-06-07 | 凸版印刷株式会社 | Film thickness measuring device using white light and ink supply amount controlling device using the same |
DE4427967B4 (en) | 1993-08-24 | 2004-09-30 | Heidelberger Druckmaschinen Ag | Method for presetting the pressure between ink-guiding cylinders of a printing press |
US5652659A (en) | 1995-10-09 | 1997-07-29 | Ohio Electronic Engravers, Inc. | System and method for measuring run-out and other characteristics of a workpiece mounted on an engraver |
DE19537807C1 (en) * | 1995-10-11 | 1997-02-06 | Roland Man Druckmasch | Method for determining layers |
DE20122584U1 (en) | 2001-03-27 | 2006-07-27 | Windmöller & Hölscher Kg | Print image setting device for rotary printing machine has camera feeding successively acquired print images to control or regulating unit that produces signals for participating rollers |
DE10211870B4 (en) * | 2001-03-29 | 2010-07-29 | Heidelberger Druckmaschinen Ag | Method for adjusting two rollers of a printing unit which can be applied to one another |
EP1916102B2 (en) | 2006-10-23 | 2014-06-25 | Bobst Bielefeld GmbH | Method of adjusting a roller in a rotary printing press |
JP2009107188A (en) * | 2007-10-29 | 2009-05-21 | Mitsubishi Heavy Ind Ltd | Device and method for setting zero point of ink supply arrangement of printing machine, and device and method for adjusting ink supply arrangement |
DE102008025053B4 (en) | 2008-01-18 | 2023-07-06 | Garmin Switzerland Gmbh | navigation device |
DE102009025053A1 (en) | 2009-06-10 | 2010-12-16 | Windmöller & Hölscher Kg | Device and method for mutual hiring at least two cylinders of a printing press |
-
2010
- 2010-05-07 EP EP10162344A patent/EP2384892A1/en not_active Withdrawn
-
2011
- 2011-05-09 ES ES14157875.7T patent/ES2595256T3/en active Active
- 2011-05-09 ES ES11717678.4T patent/ES2478247T3/en active Active
- 2011-05-09 US US13/696,700 patent/US20130291749A1/en not_active Abandoned
- 2011-05-09 EP EP14157875.7A patent/EP2759407B1/en active Active
- 2011-05-09 WO PCT/EP2011/057417 patent/WO2011138466A1/en active Application Filing
- 2011-05-09 EP EP11717678.4A patent/EP2566695B1/en active Active
-
2014
- 2014-12-15 US US14/570,134 patent/US20150210058A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2011138466A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2566695B1 (en) | 2014-04-16 |
EP2759407B1 (en) | 2016-07-13 |
ES2595256T3 (en) | 2016-12-28 |
US20130291749A1 (en) | 2013-11-07 |
WO2011138466A1 (en) | 2011-11-10 |
EP2759407A3 (en) | 2015-05-06 |
EP2759407A2 (en) | 2014-07-30 |
US20150210058A1 (en) | 2015-07-30 |
ES2478247T3 (en) | 2014-07-21 |
EP2384892A1 (en) | 2011-11-09 |
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