EP3016805A1 - Verfahren und vorrichtung zum gegenseitigen anstellen von zwei zylindern in einer druckmaschine - Google Patents
Verfahren und vorrichtung zum gegenseitigen anstellen von zwei zylindern in einer druckmaschineInfo
- Publication number
- EP3016805A1 EP3016805A1 EP14736785.8A EP14736785A EP3016805A1 EP 3016805 A1 EP3016805 A1 EP 3016805A1 EP 14736785 A EP14736785 A EP 14736785A EP 3016805 A1 EP3016805 A1 EP 3016805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- value
- cylinder
- cylinders
- measured variable
- angle
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0072—Devices for measuring the pressure between cylinders or bearer rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/004—Electric or hydraulic features of drives
- B41F13/0045—Electric driving 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
- B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
- B41F13/26—Arrangement of cylinder bearings
- B41F13/30—Bearings mounted on sliding supports
-
- 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
- B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
- B41F13/34—Cylinder lifting or adjusting devices
- B41F13/38—Cylinder lifting or adjusting devices electrically or magnetically operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/02—Arrangements of indicating devices, e.g. counters
-
- 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 and apparatus for mutual adjustment of two cylinders in a printing press.
- the cylinders involved in a flexographic printing process and in a flexographic printing machine on the printing process must be made very close to each other in order to ensure the optimal color transfer mentioned above. This is due to the fact that in flexographic printing the printing areas are raised compared to the non-printing areas of a printed image.
- the print jobs on a printing press change relatively frequently, which is usually accompanied by the change of at least the printing plates or the cylinder components on which they are mounted.
- the pressure length changes, ie the circumference of the cylinders.
- the optimum setting position must be determined using a positioning method. A great desire is to produce as little waste as possible.
- the document DE 2009 025 053 A1 already describes an apparatus and a method for mutually adjusting at least two cylinders of a printing press.
- the two cylinders which preferably have at each of their ends an adjusting device which comprise at least bearing blocks and actuators, gradually approached each other.
- the respective setting position whose optimum value is to be determined yes, is determined in each case and also stored.
- the two cylinders rotate by the influence of drives.
- the peripheral speeds of the two cylinders are different.
- the one measured variable of at least one of the two cylinders is permanently measured and their values are measured and stored.
- the rotational speed of the cylinder is a suitable measure.
- Another suitable measure is the braking force.
- the measured variable initially has a substantially constant basic value, which can be referred to as the initial value.
- the object of the present invention is therefore to propose a method and a device with which the finding of the optimum setting position of two cylinders can be accelerated.
- this object is achieved on the basis of the above-mentioned features by the features of the characterizing part of claim 1. Accordingly, it is provided that the value of the rotation angle is recorded at which there is a deviation of the value of the measured variable from the initial value. It is therefore intended not to abort the process already upon detection of the first contact, but to record the total rotation angle at which the deviation from the initial value already described results. If, for example, there is a small angle of rotation, for example of one or a few degrees, then it can often be assumed that the optimum setting value has not yet been reached. If, however, a larger angle of rotation arises, then one can assume that already a major part or the entire part of the printing areas has contact with the second cylinder, so that one is already close to the optimum adjustment value.
- the change in the setting position is preferably carried out in steps with a width of less than 50 micrometers, in particular less than 25 micrometers.
- a function of the value of the angle of rotation which results in a deviation of the value of the measured variable from the initial value, depending on the setting position, is thus obtained.
- the value should initially be at 0, increase with further reduction of the distance of the cylinder and later go into a saturation region.
- the number of different setting positions, which are controlled by the control unit, can be limited when the saturation range is reached. The number can also be before Implementation of the method by the machine operator or machine side be given or be.
- the optimal positioning position can now be found from the described function as follows: Where the function has the greatest slope (ie a maximum in the department), the optimum positioning position can first be determined. However, in order to detect the deeper areas, the slopes of the function are now also checked for other positioning positions. The next highest slope, especially the second largest slope, is now set as the optimal pitch. In a further embodiment, however, this position is only considered to be the optimum setting position if the value of this gradient has a minimum proportion of the value of the greatest gradient. For example, the second largest slope is only evaluated if its value is at least 10% of the value of the largest slope.
- Fig. 1 side view of a flexographic printing machine
- Fig. 2 Enlarged view of an inking unit
- Fig. 1 shows a typical flexographic printing machine 100 equipped with an apparatus for reciprocating two cylinders.
- the printing machine shown is a so-called central cylinder flexographic printing machine and includes the essential components described below.
- an unwinding device 101 for unwinding a material web 1 10 of a winding 1 1 1 is provided.
- This material web 1 10 is supplied to the printing unit 102, in which it is acted upon by at least one color.
- the printed material web 1 10 is passed through a drying device in which the printed ink is dried.
- the winding of the material web 1 10 takes place on a roll 1 12 in the winding device 104.
- the printing unit 102 comprises a central impression cylinder 120, on which the material web 1 10 is placed by means of a pressure roller 121.
- the material web 1 10 always resting on the outer surface of the impression cylinder 120, guided past several inking units, one of which is exemplified by the reference numeral 122. With every inking unit, a printing ink can be applied to the material web.
- An inking unit 122 in this case comprises a format cylinder 123 and an inking roller 124, which is generally designed as an anilox roller.
- FIG. 2 shows an enlarged view of a section of the printing unit 122.
- the displacement device 210 for the format cylinder 123 which comprises a carriage 21 1, which carries the format cylinder 123.
- the carriage is linearly displaceable on a rail 212.
- the displacement is effected by the motor M s , which drives a spindle 213, which is screwed into a thread of the carriage.
- the drive which here through a motor is realized, is controlled by the control device S or even regulated.
- the drive of the format cylinder is performed by the motor M F Z, which is also controlled by the controller.
- the format cylinder rotates in the direction of the arrow RFZ.
- the format cylinder has a radius r.
- the drive of the impression cylinder is effected by the motor M G DZ, which is also controlled by the control device.
- the impression cylinder rotates in the direction of the arrow RGDZ-
- the format cylinder is covered with a first pressure plate 221 and a second pressure plate 222 whose outer surfaces lie on the radii n and r 2 .
- the relation r ⁇ r 2 ⁇ n holds.
- the pressure plate 221 occupies the angle ⁇ , the pressure plate 222 the angle a, 2nd
- the format cylinder is now gradually approximated to the impression cylinder along the axis x.
- format cylinder and impression cylinder are driven at different speeds, the format cylinder is advantageously driven at the higher speed.
- To drive the format cylinder is preferably an asynchronous motor, which is operated in the field weakening operation, used, as described in DE 2009 025 053 A1.
- the format cylinder 123 essentially rotates one full revolution until it is further approximated to the impression cylinder 120. First, the printing plates 221 have no contact with the printing material, not shown, which rests on the impression cylinder 120.
- r is the distance of the axis of rotation of the format cylinder to the peripheral surface of the impression cylinder.
- another pressure plate exert an influence, which is spaced in the axial direction of a first pressure plate, as is usually the case multi-use printing (several independent print motifs are printed side by side on a web) is the case. In such a case, it may be convenient to end the process after a short number of different measurements.
- an abort criterion may be the second largest change in the function recorded in FIG. In this example, this is the transition from area II to area III.
- a threshold value for example if a change or a change of no more than 5% to the previous value is observed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013213264 | 2013-07-05 | ||
| PCT/EP2014/064452 WO2015001126A1 (de) | 2013-07-05 | 2014-07-07 | Verfahren und vorrichtung zum gegenseitigen anstellen von zwei zylindern in einer druckmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3016805A1 true EP3016805A1 (de) | 2016-05-11 |
| EP3016805B1 EP3016805B1 (de) | 2017-05-17 |
Family
ID=51162794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14736785.8A Active EP3016805B1 (de) | 2013-07-05 | 2014-07-07 | Verfahren und vorrichtung zum gegenseitigen anstellen von zwei zylindern in einer druckmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3016805B1 (de) |
| ES (1) | ES2634519T3 (de) |
| WO (1) | WO2015001126A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016015722B4 (de) | 2016-05-11 | 2023-06-22 | Koenig & Bauer Ag | Verfahren zum Erfassen und Einstellen von Parametern eines Bearbeitungsaggregats |
| DE102016208109A1 (de) * | 2016-05-11 | 2017-11-16 | Koenig & Bauer Ag | Verfahren zum Erfassen und Einstellen von Parametern eines Bearbeitungsaggregats |
| WO2020187665A1 (de) | 2019-03-19 | 2020-09-24 | Koenig & Bauer Ag | Verfahren zum bestimmen einer position des gegenseitigen kontaktes zwischen einer druckwalze und mindestens einer gegenwalze einer flexodruckmaschine |
| IT201900003965A1 (it) * | 2019-03-19 | 2020-09-19 | Koenig & Bauer Flexotecnica S P A | Metodo per la determinazione della posizione di mutuo contatto tra un rullo di stampa e almeno un contro-rullo scelto tra un tamburo centrale e un rullo inchiostratore in macchine di stampa flessografica e la relativa macchina di stampa flessografica |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19900258A1 (de) * | 1999-01-07 | 2000-07-13 | Fischer & Krecke Gmbh & Co | Verfahren zum Anstellen zweier Zylinder einer Druckmaschine gegeneinander |
| ES2300209B1 (es) * | 2006-11-22 | 2009-05-01 | Comexi, S.A. | Metodo de ajuste posicional de cuerpos impresores en maquinas impresoras flexograficas. |
| DE102009025053A1 (de) * | 2009-06-10 | 2010-12-16 | Windmöller & Hölscher Kg | Vorrichtung und Verfahren zum gegenseitigen Anstellen zumindest zweier Zylinder einer Druckmaschine |
-
2014
- 2014-07-07 ES ES14736785.8T patent/ES2634519T3/es active Active
- 2014-07-07 EP EP14736785.8A patent/EP3016805B1/de active Active
- 2014-07-07 WO PCT/EP2014/064452 patent/WO2015001126A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2015001126A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015001126A1 (de) | 2015-01-08 |
| ES2634519T3 (es) | 2017-09-28 |
| EP3016805B1 (de) | 2017-05-17 |
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