EP0652104B1 - Druckwerk für wasserlosen Offsetdruck - Google Patents
Druckwerk für wasserlosen Offsetdruck Download PDFInfo
- Publication number
- EP0652104B1 EP0652104B1 EP94117057A EP94117057A EP0652104B1 EP 0652104 B1 EP0652104 B1 EP 0652104B1 EP 94117057 A EP94117057 A EP 94117057A EP 94117057 A EP94117057 A EP 94117057A EP 0652104 B1 EP0652104 B1 EP 0652104B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- forme
- transfer cylinder
- printing
- cylinder
- coolant
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/20—Details
- B41F7/24—Damping devices
- B41F7/37—Damping devices with supercooling for condensation of air moisture
-
- 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
- B41F13/22—Means for cooling or heating forme or impression cylinders
Definitions
- the invention relates to a form or transfer cylinder of a printing unit for waterless offset printing.
- DE 42 02 544 A1 shows a blown air cooling device with which the printing form for printing in the waterless offset process is cooled.
- a blow bar along the forme cylinder hired, the by means of fans air through a sucks water-cooled heat exchanger and against the forme cylinder blows.
- the disadvantage is that in such printing units Transfer cylinder very warm. This warmth comes from the large flexing of the blanket and can because of little good The heat transfer to neighboring cylinders is only insignificant. Ink builds up on the warm transfer cylinder, that is, the pressure points lead to too much color. The printer is thereby, causing machine downtime, the Wash printing blankets frequently. Otherwise the pressure would smudging.
- the color accumulations on the Rubber blanket when rolling the transfer cylinder with the Form and with the impression cylinder the pressure and lead so to destroy the rubber blanket.
- the channels also cause Tension of the blanket or a finite printing form Machine vibrations and reduce the usable for printing Shell surface of a forme cylinder or transfer cylinder. Furthermore, changing a finite printing form is time-consuming.
- the blowing device cools the printing form and the Transfer form. As a result, the latter does not tend to build up Ink. Thus, while maintaining it becomes more normal Blanket washing cycles achieved good print quality and that Protected rubber blanket.
- the printing unit shown in Fig. 1 contains the printing units 1 and 2.
- Each printing unit 1, 2 has a transfer cylinder 3, 4 and a forme cylinder 5, 6.
- On each forme cylinder 5, 6 an inking unit is arranged next to the ink fountain and various ink rollers, one ink fountain roller 7, 8 and three Ink cylinder 9 to 14 contains.
- One transmission and one Forme cylinders 3, 5 and 4, 6 are each one along their axes Blower device 15, 16 assigned, that is, its blow opening 17th is on the transfer and forme cylinders 3, 5 and 4, 6th directed.
- Each blowing device 15, 16 contains a heat exchanger 18 connected to an inlet 19 and an outlet 20 for a coolant connected. The latter is from a not shown Cooling station supplied.
- the two transfer cylinders 3, 4 are in printing operation against each other and print the between them web 21 passed therethrough, the printed image on the Forme cylinders 5, 6 tensioned printing blocks colored on the Transfer cylinder 3, 4 and transfer from these on both sides applied to the web 21.
- Each blowing device 15, 16 sucks by means of blowers via the intake duct 22 and the coolant flowed through heat exchanger 18 air. This cools down and is then against the transfer cylinder 3 or 4 and the forme cylinder 5 or 6 blown. These cylinders cool down doing so.
- Cooling options are used. This is particularly the case with Roll printing appears at its higher print speeds his.
- One time for the transfer and the form cylinders separate blowing devices may be provided. Then they can too Transfer, form and ink rubbing cylinders as well as the ink fountain rollers equipped with internal cooling, such as water cooling his.
- a variant is shown in Fig. 2.
- the connection is made on operator side pin of the cylinder.
- Actuation of control valves 24 to 26 and 41 takes place by means of thermal sensors, for example infrared sensors, with the interposition of controllers. This is at the Ink fountain roller 7, the inking cylinder 10, the transfer cylinder 3 and the forme cylinder 5 each have a thermal sensor 28 to 31 arranged.
- the thermal sensor 28 is for the control valve 24, the Thermal sensor 29 for the control valve 25, the thermal sensor 30 for the Control valve 26 and the thermal sensor 31 for the control valve 41 intended.
- the regulators are in the regulating device 42 (FIG. 2) contain. It is also the thermal sensor 31 together with the Thermosensor 29 performed on a common controller.
- the associated control valve 24 becomes the output of signals from the setpoint to 26 and 41 further open or closed and thus the the corresponding amount of coolant to be supplied corresponding to the cylinder or reduced.
- the coolant is supplied by a cooling station with a low temperature, for example 12 degrees C.
- Das Inking unit is heated to a temperature of around 25 to 27 degrees C. cooled, the pressure plate to about 28 to 30 degrees C and the Transfer cylinder to about 34 to 35 degrees C.
- the temperature of the Ink fountain roller is advantageously held higher than that Inking unit temperature, for example to 28 to 30 degrees C, because otherwise the paint pulls strings and the ink delivery is disturbed becomes. This procedure is thanks to separate control loops allows.
- the inking unit partially cools the forme cylinder thanks to the application of the application rollers with thick layers of ink and the Color transfer itself is already possible. It can therefore also Regulation of the forme cylinder temperature without the need for a thermal sensor 29 only with the thermal sensor 31.
- FIG. 3 wherein a Transfer cylinder can have a similar structure.
- the Forme cylinder 43 is with its pins 44, 45 in side walls 46, 47 stored.
- the pins 44, 45 have flanges 48, 49 with which they be accommodated in a cylinder jacket tube 50.
- a separator tube 51 and an inflow tube 52 attached.
- the separation tube 51 forms together with the Cylinder jacket tube 50 a cooling chamber 53 and with the inflow tube 52 a pressure chamber 54.
- the cooling chamber 53 is over Connection bores 55 in the flange 48 with the inflow pipe 52 and over Connecting bores 56 in the flange 49 with a discharge channel 57 connected.
- the inflow pipe 52 and the discharge channel 57 lead through the drive-side pin 45 through to an arranged on this Connection head 58.
- On the pin 45 is a spur gear 59 for mounted the actuator of the cylinder.
- the forme cylinder 43 carries on the drive-side edge of its jacket 78 a connection bore 60 for compressed air. This is over a channel 61 in connection with the pressure chamber 54. From the latter introduces Channel 62 to an annular groove 63, from the radial bores 64 on lead out the operator-side edge from the cylinder jacket 78.
- To the Connection head 58 is a lead 65 and a lead 66 for the Coolant connected. The coolant flows through the inflow pipe 52 via the connecting holes 55 to the cooling chamber 53, from which it via the connecting holes 56, the discharge channel 57 and the Connection head 58 is guided out of the forme cylinder 43 again.
- Cooling the cooling chamber 53 effectively cools it Cylinder jacket tube 50.
- the circulation in the cooling chamber 53 can advantageously by means of spiral baffles (not shown) be determined.
- 64 compressed air from the radial bores flow out. This is by means of a connection hole 60th attached connection shoe 68 introduced into the forme cylinder 43.
- the compressed air can also be on the front of the Cylinder body are provided.
- For changing the printing form has the operator side wall 46 of the printing press separable bearings on whose movement by Double arrows is indicated.
- the specialist from the state solutions known in the art also for a holding device 69, which the forme cylinder 43 after exposure of its pin 44 in the Suspended so that it is not discussed in more detail.
- the sleeve-shaped printing form 67 is exchangeable.
- a sleeve-like transfer form to one or pushable by a transfer cylinder.
- the control loop serves the drive side wall 33 and the To keep the operating side wall 40 at the same temperature.
- the drive side wall 33 due to the frictional losses of the gearbox of the Gear box 32 a higher temperature than that Operator side wall 40 on.
- the consequence is not one constant temperature curve over the length of the in the Side walls 33, 40 mounted cylinders. They are accordingly Temperature conditions of the stored cylinders over their length not can be optimally determined.
- the controller 37 is set so that at compared to the operating side wall 40 of higher temperature Drive side wall 33 opens the control valve 36 and thus with corresponding throughput of coolant through the heat exchanger 34 the lubricant of the gear box 32 cools. This in turn cools the drive side wall 33 on its circulation Temperature of the operator side wall 40 from. With the temperature equality the temperature constancy of both side walls Printing unit cylinders given over their length and a requirement created for good print quality across the entire print width.
- Cooling circuits of one or more cooling stations with coolant are supplied.
- the printing units can also be costly separately be equipped with control loops. Conversely, under Cost savings are already good results if more Printing units to the control devices of the printing unit 1 be connected. Can also with the blowing devices Coolant supply and the blower output are regulated. As Coolant is advantageously water.
- the coolant circuits can be in the preparation phase are used for printing to preheat the printing units, by first using a suitably heated coolant is fed. This will cause the paint to pick Start of printing with accompanying accumulation of paper particles in the Avoiding inking, which is very important since the waterless Offset printing the dampening system is missing, which otherwise particles from the Can discharge printing unit.
- the cooling station is then regulated that the coolant temperature gradually drops in continuous printing.
- Printer preheating uses the printer described and the cooling circuits shown in Figures 1 and 2 and provides a higher one at the thermostat of the cooling station, not shown Temperature value of the coolant temperature, advantageously the Operating temperature of the ink rubbing cylinder.
- the temperature curve of the coolant for preheating can even after a temperature entered in a storage unit - Time curve or using a temperature sensor, for example a color friction cylinder, in connection with a controller become. It can e.g. B. the thermal sensor 29 on the ink cylinder 10 be used.
- the storage unit can be in the control device 42 can be accommodated.
- a web can also be printed using the so-called di-litho process become.
- a relevant course of the path is dashed in Fig. 1 located.
- the web 70 is between the transfer cylinder 4th and passed through the Formzyliner 6 and thereby from the latter printed.
- the subsequent passage of the web 70 between the Transfer cylinder 4 and the transfer cylinder 3 is on the printed web side printed a second color so that a 2 + 0 pressure arises.
- the printing unit can also be used instead of a transfer cylinder further printing unit also with an actual impression cylinder work together.
- 5 shows such a three-cylinder printing unit. It contains a forme cylinder 71, a transfer cylinder 72 and an impression cylinder 73.
- the forme cylinder 71 is a Short inking unit, namely an anilox inking unit, colored. This contains an anilox roller 75 colored by a chambered doctor blade 74 and an applicator roller 76.
- the anilox roller 75 colors the Application roller 76, which in turn is the printing form of the forme cylinder 71st Inking.
- the latter transfers the print image to the Transfer cylinder 72 that prints on web 77.
- the Cooling devices have not been shown for the sake of simplicity.
- the waterless one Offset printing drier web tends to be more electrostatic Charging with a correspondingly strong attraction of dust particles from the area. These settle on the transfer cylinder, are transferred to the forme cylinder and lead to pressure disturbances. This is counteracted with the use of the ionizing bars, also the color mist.
- sensitive electronic Protected components that are exposed to high electrical fields can be damaged or destroyed.
- the invention is not only on roles but also on Sheet-fed rotary printing presses can be used, for example in one 5 designed printing unit.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Rotary Presses (AREA)
Description
- Fig. 1:
- eine Druckeinheit mit zwei Druckwerken für wasserlosen Offsetdruck in der Seitenansicht,
- Fig. 2:
- die Innenkühlung der Farbreibzylinder, der Farbkastenwalzen, der übertragungs- und der Formzylinder,
- Fig. 3:
- einen Formzylinder im Schnitt,
- Fig. 4:
- eine Druckeinheit in der Draufsicht mit einer Vorrichtung zur Regelung der Temperatur der Seitenwände,
- Fig. 5:
- ein Dreizylinderdruckwerk.
Claims (2)
- Form- oder Übertragungszylinder (43) eines Druckwerkes (1, 2), für wasserlosen Offsetdruck, der in Seitenwänden (46, 47) gelagert ist und eine Hülse (67) trägt, wobei ein Ende des Form- oder Übertragungszylinders (43) von einer Seitenwand (46) freilegbar ist, so daß eine Öffnung entsteht, über die die Hülse (67) auf den Form- oder Übertragungszylinder (43) aufschiebbar ist, daß bei der anderen Seitenwand (47), neben der der Antrieb (59) angeordnet ist, mit einer Außenleitung (65) eine Leitung (52) für ein Kühlmittel in dem Form- oder Übertragungszylinder (43) verbunden ist, die sich durch den Form- oder Übertragungszylinder (43) bis zum anderen Ende des Form- oder Übertragungszylinders (43) erstreckt und an diesem Ende über einen radialen Zugang (55) mit einer Kühlkammer (53) in Verbindung steht, durch die das Kühlmittel unter Kühlung der Oberfläche (50) des Form- oder Übertragungszylinders (43) fließt und die über einen durch den antriebsseitigen Zapfen (45) aus dem Form- oder Übertragungszylinder (43) herausführenden Kanal (57) mit einer Ableitung (66) verbunden ist, und daß an dem der anderen Seitenwand (47) zugeordneten Ende des Form- oder Übertragungszylinders (43) Druckluft über einen Anschluß (60) durch den Form- oder Übertragungszylinder (43) durch eine Leitung (54) zu am anderen Zylinderende neben der Seitenwand (46) angeordneten Radialbohrungen (64) zugeführt wird, über die die Druckluft ausströmt, um die aufzuschiebende Hülse (67) zu erweitern.
- Form- oder Übertragungszylinder (43) nach Anspruch 1, dadurch gekennzeichnet, daß die Kühlkammer (53) die Zirkulation des Kühlmittels festlegende spiralförmige Leitbleche aufweist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9316932U DE9316932U1 (de) | 1993-11-05 | 1993-11-05 | Druckwerk für wasserlosen Offsetdruck |
DE9316932U | 1993-11-05 | ||
DE4431188A DE4431188C2 (de) | 1993-11-05 | 1994-09-01 | Druckwerk für wasserlosen Offsetdruck |
DE4431188 | 1994-09-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0652104A1 EP0652104A1 (de) | 1995-05-10 |
EP0652104B1 true EP0652104B1 (de) | 2002-04-10 |
Family
ID=25939764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94117057A Expired - Lifetime EP0652104B1 (de) | 1993-11-05 | 1994-10-28 | Druckwerk für wasserlosen Offsetdruck |
Country Status (3)
Country | Link |
---|---|
US (2) | US5595115A (de) |
EP (1) | EP0652104B1 (de) |
JP (1) | JP2877705B2 (de) |
Cited By (4)
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---|---|---|---|---|
DE10250689B3 (de) * | 2002-10-31 | 2004-12-09 | Koenig & Bauer Ag | Verfahren zur Herstellung eines Rotationskörpers sowie ein danach hergestellter Rotationskörper |
EP1574334A2 (de) | 2002-10-31 | 2005-09-14 | Koenig & Bauer Aktiengesellschaft | Rotationskörper einer Druckmaschine mit einem Ballen |
US6983696B2 (en) | 2001-10-24 | 2006-01-10 | Koenig & Bauer Ag | Apparatus for cooling material to be printed and printing units at sheet fed printing machines with cooled compressed air |
DE10250688B4 (de) * | 2002-10-31 | 2006-09-14 | Koenig & Bauer Ag | Verfahren zur Herstellung eines Rotationskörpers einer Druckmaschine mit einem Ballen sowie ein danach hergestellter Rotationskörper |
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US5535674A (en) * | 1994-06-24 | 1996-07-16 | Heidelberger Druckmaschinen Ag | Distortion-reduced lithographic printing press |
FR2737154B1 (fr) * | 1995-07-25 | 1997-10-17 | Heidelberg Harris Sa | Cylindre comportant un revetement d'impression pour l'impression offset |
FR2740726B1 (fr) * | 1995-11-08 | 1998-01-23 | Heidelberg Harris Sa | Dispositif de refroidissement de la surface du blanchet d'un groupe d'impression d'une machine rotative a imprimer |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US6983696B2 (en) | 2001-10-24 | 2006-01-10 | Koenig & Bauer Ag | Apparatus for cooling material to be printed and printing units at sheet fed printing machines with cooled compressed air |
DE10250689B3 (de) * | 2002-10-31 | 2004-12-09 | Koenig & Bauer Ag | Verfahren zur Herstellung eines Rotationskörpers sowie ein danach hergestellter Rotationskörper |
EP1574334A2 (de) | 2002-10-31 | 2005-09-14 | Koenig & Bauer Aktiengesellschaft | Rotationskörper einer Druckmaschine mit einem Ballen |
DE10250688B4 (de) * | 2002-10-31 | 2006-09-14 | Koenig & Bauer Ag | Verfahren zur Herstellung eines Rotationskörpers einer Druckmaschine mit einem Ballen sowie ein danach hergestellter Rotationskörper |
Also Published As
Publication number | Publication date |
---|---|
JPH07186360A (ja) | 1995-07-25 |
US5595115A (en) | 1997-01-21 |
EP0652104A1 (de) | 1995-05-10 |
JP2877705B2 (ja) | 1999-03-31 |
US5784957A (en) | 1998-07-28 |
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