EP0480230B1 - Temperature regulating device for a printing form on a form cylinder for waterless offset printing - Google Patents
Temperature regulating device for a printing form on a form cylinder for waterless offset printing Download PDFInfo
- Publication number
- EP0480230B1 EP0480230B1 EP91116189A EP91116189A EP0480230B1 EP 0480230 B1 EP0480230 B1 EP 0480230B1 EP 91116189 A EP91116189 A EP 91116189A EP 91116189 A EP91116189 A EP 91116189A EP 0480230 B1 EP0480230 B1 EP 0480230B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- printing
- cooler
- temperature
- regulating device
- 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
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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
Definitions
- the invention relates to a thermoregulator for a printing form placed around a printing form cylinder for waterless offset printing according to the preamble of the first claim.
- waterless offset printing uses a special silicone layer to keep the non-printing areas of the printing form free of color. This property of the silicone surface breaks down above a certain temperature, which is around 35 ° C. The optimal operating temperature is 25 ° C or below.
- a blow box installed instead of the conventional dampening roller system distributes the cold air over the entire width of the printing form cylinder Printing form.
- the blow box is connected to a thick air supply hose, which takes over the transport of cold air from a refrigeration system installed next to the printing press to the printing form cylinder of the printing unit.
- thermoregulator for the printing form.
- the object of the invention is to provide a thermal controller for a printing form placed around a printing form cylinder for waterless offset printing, which makes it possible to blow on the printing form by means of tempered air which is produced directly in the area of the printing form cylinder.
- any conventional offset printing machine can be converted in a simple manner by removing the dampening application rollers, hanging the blowing case according to the invention into the printing machine and then connecting it to existing dampening solution cooling devices.
- the machine can be prepared for the normal offset process at any time. Additional cooling systems or other units in addition to the printing press are no longer required, since the existing dampening solution coolers are already integrated in conventional printing presses for offset printing. Since the printing form cylinder heats up only slowly during operation and the printing form is also isolated by washers, no great cooling capacity is required for temperature control.
- a blow box 3 which has blow-out openings opposite the printing form cylinder 1 in order to blow it at a certain angle with the blowing air.
- the blow box 3 extends over the entire width of the printing form cylinder 1. It is preferably installed in the offset printing press instead of the conventional roller dampening unit.
- At least one fan 4 is first provided, which is mounted inside the blow box 3.
- a cooler 5 is provided in front of the fan 4 in the direction of flow of the blown air and is supplied with a coolant 7, preferably with water, by a refrigeration system 6 from outside the blower box 3.
- a cooling coil 11 in the form of finned tubes having a cooler 5 is suitable.
- the cooling coils 11 are provided with a water inlet line 10 and a water outlet line 9 of a refrigeration system 6, preferably in the form of a water cooling device, e.g. a commercially available fountain solution cooling unit.
- a water cooling device e.g. a commercially available fountain solution cooling unit.
- a sensor 12 which detects the temperature of the coolant 7 and a controller 8 are provided which regulate the cooling of the cooler 5 as a function of the temperature of the coolant 7.
- a thermostatically controllable throttle valve is suitable, which is provided in the water drainage line 9.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Printing Methods (AREA)
- Rotary Presses (AREA)
- Electronic Switches (AREA)
Abstract
Description
Die Erfindung betrifft einen Thermoregler für eine um einen Druckformzylinder gelegte Druckform für wasserlosen Offsetdruck nach dem Oberbegriff des ersten Patentanspruches.The invention relates to a thermoregulator for a printing form placed around a printing form cylinder for waterless offset printing according to the preamble of the first claim.
Durch die FR-A 1 014 725 ist es bekannt, über einen Farbzylinder einen Blaskasten anzuordnen und durch diesen erwärmte Luft und zerstäubte Flüssigkeit auf den Farbzylinder aufzubringen.From FR-A 1 014 725 it is known to arrange a blow box via a paint cylinder and to apply heated air and atomized liquid to the paint cylinder.
Im Gegensatz zum konventionellen Offsetdruck, bei dem mit Feuchtmittel gearbeitet wird, hält beim wasserlosen Offsetdruck eine spezielle Silikonschicht die nichtdruckenden Stellen der Druckform farbfrei. Diese Eigenschaft der Silikon-Oberfläche bricht oberhalb einer bestimmten Temperatur, die ca. bei 35°C liegt, zusammen. Die optimale Betriebstemperatur liegt bei 25°C oder unterhalb davon.In contrast to conventional offset printing, which uses dampening solution, waterless offset printing uses a special silicone layer to keep the non-printing areas of the printing form free of color. This property of the silicone surface breaks down above a certain temperature, which is around 35 ° C. The optimal operating temperature is 25 ° C or below.
Aus der Zeitschrift "Offsetpraxis" 4/1990, Seiten 38 bis 46 ist es bekannt, als Alternative zu einer Farbwerkswalzentemperierung, bei der als Kühlmedium eine Flüssigkeit verwendet wird, beim wasserlosen Offsetdruck die um den Druckformzylinder gelegte Druckform mit kalter Luft unter einem bestimmten Winkel anzublasen, so daß die Druckformtemperatur bei der vorstehend genannten Betriebstemperatur konstant gehalten werden kann.From the magazine "Offsetpraxis" 4/1990, pages 38 to 46, it is known, as an alternative to an inking unit roller temperature control in which a liquid is used as the cooling medium, to blow the printing form around the printing form cylinder with cold air at a certain angle in waterless offset printing , so that the printing form temperature can be kept constant at the above-mentioned operating temperature.
Bei derartigen Offsetdruckmaschinen verteilt ein statt des konventionellen Feuchtwalzensystems installierter Blaskasten die kalte Luft über die gesamte Breite des Druckformzylinders auf die Druckform. Hierzu ist der Blaskasten mit einem dicken Luftzuführungsschlauch verbunden, der den Transport kalter Luft von einer neben der Druckmaschine aufgestellten Kälteanlage zum Druckformzylinder des Druckwerkes übernimmt.In such offset printing machines, a blow box installed instead of the conventional dampening roller system distributes the cold air over the entire width of the printing form cylinder Printing form. For this purpose, the blow box is connected to a thick air supply hose, which takes over the transport of cold air from a refrigeration system installed next to the printing press to the printing form cylinder of the printing unit.
Bei derartiger Formzylinder-Druckformkühlung wird nicht nur das optische Erscheinungsbild der Druckmaschine durch die dicken langen Luftzuführungsschläuche gestört, sondern auch die Zugänglichkeit zu den Druckwerken durch die zu demontierenden Zuführungsschläuche behindert.With such a form cylinder printing plate cooling, not only is the optical appearance of the printing machine disturbed by the thick, long air supply hoses, but also the accessibility to the printing units is hindered by the supply hoses to be dismantled.
Im Zusammenhang mit dem Anblasen der Druckform mittels kalter Luft kann man auch von Temperierung sprechen, weil neben der Kühlung auch eine Erwärmung erfolgt, bis die Oberfläche der Druckform bei kalter Druckmaschine auf die optimale Betriebstemperatur von z.B. 25°C gebracht ist. Es liegt somit ein Thermoregler für die Druckform vor.In connection with the blowing of the printing form by means of cold air, one can also speak of tempering, because in addition to cooling, heating also takes place until the surface of the printing form is cold when the printing press is at the optimal operating temperature, e.g. 25 ° C is brought. There is therefore a thermoregulator for the printing form.
Aufgabe der Erfindung ist es, einen Thermoregler für eine um einen Druckformzylinder gelegte Druckform für wasserlosen Offsetdruck zu schaffen, der es ermöglicht, die Druckform mittels temperierter Luft anzublasen, die unmittelbar im Bereich des Druckformzylinders erzeugt wird.The object of the invention is to provide a thermal controller for a printing form placed around a printing form cylinder for waterless offset printing, which makes it possible to blow on the printing form by means of tempered air which is produced directly in the area of the printing form cylinder.
Gelöst wird diese Aufgabe mit den Merkmalen des Kennzeichens des ersten Patentanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen.This object is achieved with the features of the characterizing part of the first claim. Further training results from the subclaims.
Der Vorteil der Erfindung besteht darin, daß das optische Erscheinungsbild einer Offsetdruckmaschine für wasserlosen Offsetdruck wegen des Fehlens der dicken langen Luftführungsschläuche nicht mehr gestört wird. Auch wird die damit verbundene, wenn auch nicht sehr bedeutende Beeinträchtigung der Zugänglichkeit zu den Druckwerken beseitigt. Ferner treten durch die kompakte Bauweise weniger Temperaturverluste der heranzutransportierenden Luft auf und es sind kleine Regelzeiten erreichbar. Außerdem läßt sich jede konventionelle Offset-Druckmaschine auf einfache Weise umrüsten, indem die Feuchtauftragwalzen herausgenommen werden, der erfindungsgemäße Blaskasen in die Druckmaschine eingehangen wird und anschließend an vorhandene Feuchtmittelkühlgeräte angeschlossen wird. Ferner kann die Maschine jederzeit wieder für den normalen Offsetprozess hergerichtet werden. Zusätzliche Kälteanlagen oder sonstige Aggregate neben der Druckmaschine sind nicht mehr erforderlich, da die vorhandenen Feuchtmittelkühlgeräte bereits in konventionelle Druckmaschinen für Offsetdruck integriert sind. Da sich der Druckformzylinder im Betrieb nur langsam erwärmt und die Druckform außerdem noch durch Unterlegbögen isoliert ist, wird zur Temperierung keine große Kühlleistung erforderlich.The advantage of the invention is that the optical appearance of an offset printing machine for waterless offset printing is no longer disturbed due to the absence of the thick, long air guide tubes. The associated, albeit not very significant, impairment of accessibility to the printing units is also eliminated. Furthermore, due to the compact design, less temperature losses of the air to be transported occur and short control times can be achieved. In addition, any conventional offset printing machine can be converted in a simple manner by removing the dampening application rollers, hanging the blowing case according to the invention into the printing machine and then connecting it to existing dampening solution cooling devices. Furthermore, the machine can be prepared for the normal offset process at any time. Additional cooling systems or other units in addition to the printing press are no longer required, since the existing dampening solution coolers are already integrated in conventional printing presses for offset printing. Since the printing form cylinder heats up only slowly during operation and the printing form is also isolated by washers, no great cooling capacity is required for temperature control.
Die Erfindung wird anhand einer Zeichnung in einem Ausführungsbeispiel näher erläutert. Hierzu zeigt:
- Fig. 1
- den prinzipiellen Aufbau des Thermoreglers, im Grundriss, schematisch,
- Fig. 2
- den Schnitt A-B nach Fig. 1.
- Fig. 1
- the basic structure of the thermoregulator, in the floor plan, schematic,
- Fig. 2
- the section AB of FIG. 1st
Der grundsätzliche Aufbau und die Wirkungsweise einer Offset-Druckmaschine für wasserlosen Offsetdruck ist bekannt und bedarf daher im vorliegenden Zusammenhang keiner näheren Erläuterung. Lediglich soll darauf hingewiesen werden, daß das Druckbild bei derartigen Offset-Druckmaschinen von der Druckform zunächst auf einen mit einem Gummituch bespannten Zylinder sowie von diesem auf das zu bedruckende Material übertragen wird. Hierzu ist die das Druckbild aufweisende Druckform 2 um einen Druckformzylinder 1 gelegt.The basic structure and mode of operation of an offset printing machine for waterless offset printing is known and therefore does not require any further explanation in the present context. It should only be pointed out that the print image in such offset printing machines is first transferred from the printing form to a cylinder covered with a rubber blanket and from there onto the material to be printed. For this purpose, the
Zum Anblasen der Druckform 2 mit temperierter Luft ist ein Blaskasten 3 vorgesehen, der dem Druckformzylinder 1 gegenüberliegend Ausblasöffnungen besitzt, um diesen unter einem bestimmten Winkel mit der Blasluft anzublasen. Der Blaskasten 3 reicht dabei über die gesamte Breite des Druckformylinders 1. Er ist vorzugsweise anstelle des konventionellen Walzenfeuchtwerkes in die Offsetdruckmaschine eingebaut.To blow the
Um die zu temperierende Blasluft unmittelbar im Bereich des Druckformzylinders vor der Druckform erzeugen zu können, ist zunächst mindestens ein Ventilator 4 vorgesehen, der innerhalb des Blaskastens 3 montiert ist. Vor dem Ventilator 4 ist in Strömungsrichtung der Blasluft ein Kühler 5 vorgesehen, der von einer Kälteanlage 6 von außerhalb des Blaskastens 3 mit einem Kühlmittel 7, vorzugsweise mit Wasser versorgt wird. Beispielsweise ist ein Kühlschlangen 11 in Form von Rippenrohren aufweisender Kühler 5 geeignet. Bei dieser sogenannten Querströmung der Blasluft unter Verwendung platzsparender Rippenrohre wird ein guter Wärmeübergang erreicht, bei kleiner Kühlleistung.In order to be able to generate the blown air to be tempered directly in the area of the printing form cylinder in front of the printing form, at least one
Die Kühlschlangen 11 sind mit einer Wasserzulaufleitung 10 und einer Wasserablaufleitung 9 einer Kälteanlage 6, vorzugsweise in Form eines Wasserkühlgerätes, z.B. eines handelsüblichen Feuchtwasserkühlgerätes verbunden.The
Schließlich sind ein die Temperatur des Kühlmittels 7 erfassender Meßfühler 12 und ein Regler 8 vorgesehen, der die Kühlung des Kühlers 5 in Abhängigkeit von der Temperatur des Kühlmittels 7 reguliert. Hierzu ist ein thermostatisch steuerbares Drosselventil geeignet, das in der Wasserabflußleitung 9 vorgesehen ist.Finally, a
Denkbar wäre auch durch Thermostat geregelt die Ventilatoren 4 ein- und auszuschalten, z. B. in Abhängigkeit von der Temperatur der Blasluft ausgangsseitig, wobei dann in der Nähe der Druckform 2 an den Austrittsöffnungen des Blaskastens 3 ein die Temperatur der temperierten Blasluft erfassender Meßfühler vorzusehen wäre.It would also be conceivable to regulate and switch the
Dies ist in der Zeichnung nicht dargestellt, weil entsprechende Regelungen im Steuerstromkreis von Ventilatoren, z.B. bei Heizungen allgemein üblich sind.This is not shown in the drawing, because corresponding regulations in the control circuit of fans, for example in heating systems, are common.
- 11
- DruckformzylinderPrinting form cylinder
- 22nd
- DruckformPrinting form
- 33rd
- BlaskastenBlow box
- 44th
- Ventilatorfan
- 55
- Kühlercooler
- 66
- KälteanlageRefrigeration system
- 77
- KühlmittelCoolant
- 88th
- ReglerRegulator
- 99
- KühlmittelabflußleitungCoolant drain line
- 1010th
- KühlmittelzuflußleitungCoolant inflow line
- 1111
- KühlschlangeCooling coil
- 1212th
- MeßfühlerSensor
Claims (4)
- Temperature regulating device for a printing forme set around a printing forme cylinder (1) for waterless offset printing in which the printed image is first transferred from the printing forme (2) on to a cylinder covered with a rubber blanket as well as from this on to the material to be printed, wherein a blowing chamber (3) is provided for blowing on the printing forme (2) with tempered air, characterised in that within the blowing chamber (3) there is mounted at least one fan (4), that for tempering the blowing air generated by fan (4) within the blowing chamber (3) there is provided a cooler (5) arranged in the flow direction in front of the fan (4), that furthermore a cold unit (6) is provided to provide the cooler (5) with cooling agent (7) from outside the blowing chamber (3) and that finally a controller (8) is provided which controls the cooling of the cooler (5) in dependence on a temperature.
- Temperature regulating device according to Claim 1, characterised in that the cooler (5) has a cooling snake (11) which is connected with a cooling unit (6) in the form of an external water feed lead (10), e.g. of a commercial damping water cooling apparatus.
- Temperature regulating device according to Claim 1 and 2, characterised in that the controller (8) controls the cooling of the cooler (5) in dependence on the temperature of the cooling agent (7) by means of a thermostatically controllable throttle valve which is inserted into the water return flow lead of the water cooling apparatus.
- Temperature regulating device according to Claim 1 and 2, characterised in that the controller (8) controls the cooling of the cooler (5) in dependence on the temperature of the tempered blown air by means of a thermostatically controllable switch which is provided in the control circuit of the fans (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4031859 | 1990-10-08 | ||
| DE4031859 | 1990-10-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0480230A1 EP0480230A1 (en) | 1992-04-15 |
| EP0480230B1 true EP0480230B1 (en) | 1994-11-09 |
Family
ID=6415843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91116189A Expired - Lifetime EP0480230B1 (en) | 1990-10-08 | 1991-09-24 | Temperature regulating device for a printing form on a form cylinder for waterless offset printing |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5178064A (en) |
| EP (1) | EP0480230B1 (en) |
| JP (1) | JPH0722991B2 (en) |
| AT (1) | ATE113899T1 (en) |
| DE (2) | DE9017795U1 (en) |
| ES (1) | ES2064022T3 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5588360A (en) * | 1993-03-11 | 1996-12-31 | Baldwin-Gegenheimer Gmbh | Temperature-control device for rotating bodies in printing mechanisms |
| US5595115A (en) * | 1993-11-05 | 1997-01-21 | Man Roland Druckmaschinen Ag | Printing mechanism including means for cooling and means for mounting sleeve shaped forms on transfer and form cylinders |
| US5881643A (en) * | 1995-11-08 | 1999-03-16 | Heidelberger Druckmaschinen Ag | Device for cooling the surface of a blanket of a printing unit cylinder |
| DE19610900C5 (en) * | 1995-04-28 | 2010-07-15 | Goss International Montataire S.A. | Folder with a main folding device and an associated additional cutting module |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4202544A1 (en) * | 1992-01-30 | 1993-08-05 | Baldwin Gegenheimer Gmbh | PRINT PLATE TEMPERATURE SYSTEM FOR A PRINTING MACHINE |
| DE4231263A1 (en) * | 1992-09-18 | 1994-03-24 | Heidelberger Druckmasch Ag | Printing unit device of a web printing machine with anti-smear device |
| DE4326835A1 (en) * | 1993-08-10 | 1995-02-16 | Baldwin Gegenheimer Gmbh | Temperature control system for printing press cylinders |
| DE4335097C2 (en) * | 1993-10-14 | 1999-02-25 | Baldwin Grafotec Gmbh | Device for tempering printing press cylinders and rollers |
| AU3013695A (en) * | 1994-08-18 | 1996-02-29 | Martin David Allum | A method and device for controlling the temperature of an image cylinder in a printing-press |
| DE9413439U1 (en) * | 1994-08-19 | 1994-11-17 | Baldwin-Gegenheimer Gmbh, 86165 Augsburg | Press temperature control system |
| US5908000A (en) * | 1996-01-31 | 1999-06-01 | Holoubek, Inc. | Heat curing system for silk screen printing press |
| DE19933438B4 (en) * | 1999-07-16 | 2004-07-08 | Man Roland Druckmaschinen Ag | Printing machine with printing / coating units not involved in the printing / coating process |
| DE10152593A1 (en) * | 2001-10-24 | 2003-05-08 | Koenig & Bauer Ag | Device for printing material and printing unit cooling by means of cooled blown air on sheet-fed rotary printing machines |
| DE10222587A1 (en) * | 2002-05-22 | 2003-12-04 | Voith Paper Patent Gmbh | Paper coating station has automated emergency water cooling system triggered by unplanned termination of web feed, break or tear |
| DE10222586A1 (en) * | 2002-05-22 | 2003-12-04 | Voith Paper Patent Gmbh | Paper or carton web coating assembly has guillotine cutter on web feed inlet side and second guillotine cutter on web output side |
| DE10334657A1 (en) * | 2003-07-30 | 2005-02-17 | Koenig & Bauer Ag | Method and device for printing substrate and printing machine cooling |
| CN111284119A (en) * | 2020-04-09 | 2020-06-16 | 深圳市绍永福印刷有限公司 | Printing roller cooling device for printing equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB115970A (en) * | 1917-07-30 | 1918-05-30 | Amalgamated Press Ltd | Improvements connected with Printing Machines. |
| FR1014725A (en) * | 1950-03-16 | 1952-08-20 | Prografin G M B H | Apparatus for cooling the color ink cylinders of printing presses during printing |
| US2971460A (en) * | 1959-03-30 | 1961-02-14 | George H Shindle | Method and apparatus for automatic temperature control of rotary printing press ink rollers |
| US5074213A (en) * | 1987-08-04 | 1991-12-24 | Seiichi Kurosawa | Thermoregulator of a block cylinder used for an offset press |
| US4920881A (en) * | 1988-05-02 | 1990-05-01 | Webquip Corporation | Method of cooling hot webs |
| DE3925034C1 (en) * | 1989-07-28 | 1990-08-09 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De |
-
1990
- 1990-10-08 DE DE9017795U patent/DE9017795U1/en not_active Expired - Lifetime
-
1991
- 1991-09-24 AT AT91116189T patent/ATE113899T1/en not_active IP Right Cessation
- 1991-09-24 ES ES91116189T patent/ES2064022T3/en not_active Expired - Lifetime
- 1991-09-24 DE DE59103491T patent/DE59103491D1/en not_active Expired - Fee Related
- 1991-09-24 EP EP91116189A patent/EP0480230B1/en not_active Expired - Lifetime
- 1991-09-30 JP JP3250836A patent/JPH0722991B2/en not_active Expired - Fee Related
- 1991-10-08 US US07/774,528 patent/US5178064A/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| Offsetpraxis 4/1990, Seiten 38 - 46 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5588360A (en) * | 1993-03-11 | 1996-12-31 | Baldwin-Gegenheimer Gmbh | Temperature-control device for rotating bodies in printing mechanisms |
| US5595115A (en) * | 1993-11-05 | 1997-01-21 | Man Roland Druckmaschinen Ag | Printing mechanism including means for cooling and means for mounting sleeve shaped forms on transfer and form cylinders |
| DE19610900C5 (en) * | 1995-04-28 | 2010-07-15 | Goss International Montataire S.A. | Folder with a main folding device and an associated additional cutting module |
| US5881643A (en) * | 1995-11-08 | 1999-03-16 | Heidelberger Druckmaschinen Ag | Device for cooling the surface of a blanket of a printing unit cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0480230A1 (en) | 1992-04-15 |
| ATE113899T1 (en) | 1994-11-15 |
| US5178064A (en) | 1993-01-12 |
| DE59103491D1 (en) | 1994-12-15 |
| DE9017795U1 (en) | 1992-03-12 |
| ES2064022T3 (en) | 1995-01-16 |
| JPH0722991B2 (en) | 1995-03-15 |
| JPH04234652A (en) | 1992-08-24 |
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