EP1637327A2 - Groupe d'impression offset comportant au moins un cylindre conditionné thermiquement - Google Patents
Groupe d'impression offset comportant au moins un cylindre conditionné thermiquement Download PDFInfo
- Publication number
- EP1637327A2 EP1637327A2 EP05108318A EP05108318A EP1637327A2 EP 1637327 A2 EP1637327 A2 EP 1637327A2 EP 05108318 A EP05108318 A EP 05108318A EP 05108318 A EP05108318 A EP 05108318A EP 1637327 A2 EP1637327 A2 EP 1637327A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- printing unit
- unit according
- temperature control
- zone
- 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.)
- Withdrawn
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Classifications
-
- 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 printing unit of an offset printing machine with at least one forme cylinder, a transfer cylinder and an impression cylinder according to the preamble of claim 1.
- the cooling of the impression cylinder is particularly required for a six-plate wide printing unit when in production modes with reduced web width (2/3, 3/6, 2/6) the heat generated by the missing paper run can not be transported away.
- the frequency of a reduced web width increases with the new technology with wide webs.
- the printing process is disturbed by the increased surface temperature of the particular chrome-plated impression cylinder. It comes to an increased adhesion of the ink on the surface and the cleaning of the impression cylinder is difficult.
- WO 2004/039591 A1 shows a rotary body of a printing machine, wherein on the lateral surface of the bale of the rotary body serving as cooling channels grooves are formed and the grooves are closed to the outside by welded strips.
- DE 32 42 066 A1 discloses a cooling roll for printing machines, inside which shell-like partitions are provided, wherein in the central region of the roll wall heat-insulating elements are arranged to hinder the transport of heat on the surface of the cooling roll in the longitudinal direction.
- a temperature-controlled printing forme cylinder is known.
- This cylinder has a circumferentially distributed chamber system for coolant.
- the invention has for its object to provide a printing unit of an offset printing machine with at least one forme cylinder, a transfer cylinder and an impression cylinder.
- the temperature control, in particular cooling, of at least one cylinder or at least one zone arranged in the axial direction of the cylinder is proposed, as a result of which the print quality, in particular in the case of part-width printing material, can be increased considerably.
- the tempered zones may in particular be a width of a lift, e.g. a blanket or a printing plate.
- the temperature-controllable cylinder has tempering channels for selectively feeding the temperature control medium to one or more of the zones.
- the temperature control channels are substantially parallel to the cylinder axis and are preferably formed as introduced into the lateral surface of the bale of the cylinder grooves, which are closed at its radially outer side by strip-shaped profile body.
- the individual temperature-controllable zones are each assigned an annular channel extending in the circumferential direction, which communicates with the temperature-control channels of the respective zone and supplies the temperature-control means to them.
- the ring channels are fed via supply lines, which extend from a coaxial to the axis of the cylinder extending supply in a head disk of the cylinder initially star-shaped radially outward and then axially parallel to the respectively associated zones.
- cooling can also take place via the existing spray dampening unit, whereby the non-printing areas (in the area of the non-existing printing substrate) of the forme cylinder provided with so-called blanking plates are also exposed to dampening solution, but not to paint.
- one or more zones for the purpose of temperature control, in particular the cooling targeted blowing air can be supplied
- Fig. 1 shows a three-cylinder printing unit or a printing unit 20 of an otherwise not shown offset printing machine, which may be part of a larger printing unit such as in particular a nine-cylinder satellite printing unit, but also as a three-cylinder printing unit is operable ,
- the printing unit 20 is preferably three times wide, ie for the pressure of six executed axially juxtaposed newspaper pages.
- a six-plate wide printing unit 20 is represented with a two-thirds wide web 46.
- the printing unit 20 comprises a forme cylinder 21, a transfer cylinder 22 adjacent thereto and a counter-pressure cylinder 23 forming a printing gap with the transfer cylinder 22, the z. B. a satellite cylinder 23 or another transfer cylinder 23 may be.
- the web to be printed 46 is guided between transfer cylinder 22 and impression cylinder 23.
- the form cylinder 21 is associated with a not shown inking unit and also not shown dampening unit.
- the circumference of the forme cylinder 21 is for receiving two stationary printed pages, z.
- newspaper pages in broadsheet format by means of two in the circumferential direction on the forme cylinder 21 successively fixable elevators in the form of flexible printing plates, in particular printing plates, formed.
- the printing plates can be mounted in the circumferential direction on the forme cylinder 21 via the grooves 25 formed there and can be exchanged individually in each case as an individual printing plate equipped with a printing side in the axial direction.
- the printing plates are not shown in FIG. 1.
- the length of the usable bale of the forme cylinder 21 is in the axial direction for receiving z.
- the transfer cylinder 22 is longitudinally adjacent to each other with three elevators 26a; 26b; 26c (rubber blankets) occupied. They extend in the circumferential direction substantially to the full extent.
- the elevators 26a; 26b; 26c are alternately offset from each other, whereby the vibration behavior is favorably influenced.
- the forme cylinder 21 has in the axial direction of the forme cylinder 21 six (not shown) pressure plates and thus has a length, the six stationary or corresponds to lying newspaper pages.
- the elevators provided on the forme cylinder 21 and the transfer cylinder 22 are designed as flexible plates, as known, for example, from WO 03/031180 A2, to the contents of which reference is made in this connection.
- the transfer cylinder 22 has a (not shown here) tempering or cooling device, which allows targeted temperature control or cooling of certain sections of the transfer cylinder 22.
- the transfer cylinder 22 in three zones 47; 48; 49, wherein seen in the axial direction of the transfer cylinder 22, the positions and widths of these zones 47; 48; 49 those of the elevators 26a; 26b; 26c correspond.
- Each tempered or temperature-controlled zone 47; 48; 49 thus corresponds to the width of the corresponding elevator 26a; 26b; 26c.
- each zone 47 takes place; 48; 49 from the inside, by within the transfer cylinder 22 in the region of each zone 47; 48; 49 and from the adjacent zone 47; 48; 49 each separated or separable as the temperature control a suitable liquid is arranged.
- Each zone 47; 48; 49 is basically independent of the other zone 47; 48; 49 tempered, where quite two zones 47; 48; 49 can be tempered together, ie in particular the zones 47; 48 in the region of the web 46 with one temperature and the zone 49 at a different temperature.
- the temperature can be controlled by acting on the respective zone 47; 48; 49 or zones 47; 48; 49 are controlled with temperature control of different temperature and / or amount.
- a common line is provided which supplies temperature control means from outside the cylinder 22.
- a valve arrangement is provided, the temperature control either the respective zone 47; 48; 49 and the respective zones 47; 48; 49 feeds.
- Such a valve device can be arranged inside or outside the cylinder 22.
- a first and a second line is provided, which separated from outside of the transfer cylinder 22 tempering the respective zone 47; 48; 49 and the respective zones 47; 48; 49 feeds.
- cooling can also take place via the existing spray dampening unit, in which case the non-printing areas (in the area of the non-existing printing substrate) of the forme cylinder 21 provided with so-called dummy plates are supplied with dampening solution but not with ink ,
- zones 47; 48; 49 are temperature controlled, but one or two zones 47; 48; 49 remain without targeted tempering.
- a temperature of the cylinder 21; 22; 23 from the outside is arranged as a temperature control air and the cylinder 21; 22; 23 has been specifically targeted with this air, or in that outside of the cylinder 21; 22; 23 is arranged as a temperature control liquid and the cylinder 21; 22; 23 is acted upon indirectly and / or directly from the outside with this liquid.
- the temperature control can also be designed such that within at least one tempered zone in the axial direction of the cylinder different amount of heat or by means of the dampening unit different amount of fountain solution is transferable.
- the possibility of the temperature control can be adapted to the respective conditions and it is therefore provided that the temperature of the cylinders (21, 22, 23) is determined and / or selected in accordance with the occupancy of the printing unit 20 and / or the width of the substrate.
- the impression cylinder 23 comprises a bale 50, two end-side head disks 51; 52 and two cylindrical pins 53; 54. Via a rotary feedthrough 55 on the cylinder pin 53, coolant can be fed to the interior of the counter-pressure cylinder 23 coaxially with the cylinder axis via a feed 56. Also coaxial with the cylinder axis, a discharge line 57 is formed in the interior of the impression cylinder 23, via which the coolant via the rotary feedthrough 55 from the cylinder 23 can be discharged.
- the concentric about the discharge line 57 arranged supply 56 for the coolant terminates in the head disk 51 and distributes the cooling liquid radially outwardly over initially radially radially outwardly extending supply lines 58 which the individual zones I, II, III, IV, V and VI are assigned.
- 12 angularly equally distributed supply lines are provided, corresponding to the 6 individually coolable zones I, II, III, IV, V and VI, wherein each zone I, II, III, IV, V and VI are two each diametrically opposed feed lines 58 are assigned.
- annular channel 59 which serves for the distribution of the respective zone I, II, III, IV, V and VI supplied cooling liquid in a plurality of formed on the jacket of the cylinder 23 cooling channels 60.
- the cooling channels 60 are formed parallel to the cylinder axis over the entire length of the bale 50 and made by milling in the bale grooves 67, the open sides are then closed to form the cooling channels 60 by means of strips 68 which sealingly welded to the bale 50 be, in particular by electron beam welding or laser welding.
- the groove bottoms facing the interior of the bale 50 may be at least partially lined with insulating material 61, in particular a plastic, to thermally insulate the coolant flowing through the cooling channels 60 from the interior of the bale 50 or to heat the heat from the surface of the bale 50 to the coolant improve, cf. Fig. 5.
- insulating material 61 in particular a plastic
- the first continuous cooling channels 60 are divided according to the zones I, II, III, IV, V and VI into sections of appropriate length, by at the corresponding locations in the border between adjacent zones I, II, III, IV, V or VI separating elements 62 are inserted into the cooling channels 60, which separate the cooling channel sections of individual zones I, II, III, IV, V and VI from each other.
- the above-mentioned feed lines 58 within the head disk 51 then have at the radially outwardly extending portion a parallel to the cylinder axis extending portion which opens into a feed pipe 63, respectively.
- the feed tubes 63 are each guided in a cooling channel 60 and can here be partially lowered into the bottom of the respective cooling channel 60, cf. Also, Fig. 6.
- the feed pipes 63 terminate in each associated annular channel 59, wherein each annular channel 59 two diametrically opposite feed pipes 63 are assigned.
- the length of the supply pipes 63 is in each case designed such that they extend to the assigned annular channels 59, from which the supply of coolant in the respective zone I, II, III, IV, V and VI via the cooling channels 60 takes place.
- manually controllable control valves 66 are provided in the supply lines 58 from outside the cylinder 23, via which the amount of coolant reaching the individual zones I, II, III, IV, V or VI can be individually controlled.
- the surface temperature of the cylinder 23 in the cooled zones I, II, III, IV, V and VI does not have to be reduced to room temperature; rather, approximately constant temperature conditions are around 40 ° C., as they are in the pressure ranges, sufficient.
- the temperature increase of the cylinder 23 can also be counteracted by placing dummy plates and supplying dampening solution to these zones I, which are not involved in the printing process.
- Another additional or alternative option according to an embodiment represents the targeted or selective temperature control of the cylinder surface with cooled air, which is guided by air chambers or baffles to the surface of the impression cylinder 23.
- a suitable placement of such an air duct may preferably be made at the point where the impression cylinder cleaning system is already located.
- a combination of both functions can be carried out in one device, since both functions, cooling and cleaning, must be available at short intervals.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Printing Plates And Materials Therefor (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Rotary Presses (AREA)
- Ink Jet (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004045285 | 2004-09-16 | ||
| DE102004045607 | 2004-09-17 | ||
| DE102004056388A DE102004056388B3 (de) | 2004-09-17 | 2004-11-23 | Druckwerk einer Offsetdruckmaschine mit mindestens einem Formzylinder, einem Übertragungszylinder und einem Gegendruckzylinder |
| DE102004056389A DE102004056389B4 (de) | 2004-09-16 | 2004-11-23 | Druckwerk einer Offsetdruckmaschine mit mindestens einem Formzylinder und einem Übertragungszylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1637327A2 true EP1637327A2 (fr) | 2006-03-22 |
| EP1637327A3 EP1637327A3 (fr) | 2011-07-20 |
Family
ID=35431042
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05108319A Withdrawn EP1637326A2 (fr) | 2004-09-16 | 2005-09-12 | Groupe d'impression offset comprenant un cylindre de transfert avec un recouvrement élastique |
| EP05108318A Withdrawn EP1637327A3 (fr) | 2004-09-16 | 2005-09-12 | Groupe d'impression offset comportant au moins un cylindre conditionné thermiquement |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05108319A Withdrawn EP1637326A2 (fr) | 2004-09-16 | 2005-09-12 | Groupe d'impression offset comprenant un cylindre de transfert avec un recouvrement élastique |
Country Status (1)
| Country | Link |
|---|---|
| EP (2) | EP1637326A2 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006046521A1 (de) | 2006-09-29 | 2008-04-03 | Man Roland Druckmaschinen Ag | Druckwerk einer Druckmaschine |
| DE102007047781A1 (de) * | 2007-05-08 | 2008-11-13 | Manroland Ag | Rollendruckmaschine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3242066A1 (de) * | 1982-11-13 | 1984-05-17 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Kuehlwalze mit vorgewaehlten unterschiedlichen kuehlzonen |
| JP3884957B2 (ja) * | 1999-10-08 | 2007-02-21 | ケーニツヒ ウント バウエル アクチエンゲゼルシヤフト | 輪転印刷機の胴 |
| DE19957943B4 (de) * | 1999-12-02 | 2006-07-13 | Koenig & Bauer Ag | Druckformzylinder |
| DE10250686A1 (de) * | 2002-10-31 | 2004-05-19 | Koenig & Bauer Ag | Verfahren zum Temperieren eines Ballens eines Rotationskörpers einer Druckmaschine und Rotationskörper einer Druckmaschine mit einem Ballen |
| DE10250684B3 (de) * | 2002-10-31 | 2004-04-01 | Koenig & Bauer Ag | Verfahren zur Herstellung eines Rotationskörpers und Rotationskörper einer Druckmaschine |
-
2005
- 2005-09-12 EP EP05108319A patent/EP1637326A2/fr not_active Withdrawn
- 2005-09-12 EP EP05108318A patent/EP1637327A3/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP1637326A2 (fr) | 2006-03-22 |
| EP1637327A3 (fr) | 2011-07-20 |
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Effective date: 20110630 |