EP1514697A2 - Procédé de restauration de la surface d'un cylindre d'impression dans les machines d'impression - Google Patents
Procédé de restauration de la surface d'un cylindre d'impression dans les machines d'impression Download PDFInfo
- Publication number
- EP1514697A2 EP1514697A2 EP04021091A EP04021091A EP1514697A2 EP 1514697 A2 EP1514697 A2 EP 1514697A2 EP 04021091 A EP04021091 A EP 04021091A EP 04021091 A EP04021091 A EP 04021091A EP 1514697 A2 EP1514697 A2 EP 1514697A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- printing cylinder
- cylinder
- printing
- repair
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
- B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes
Definitions
- the present invention relates to a method for repairing a sheet-guiding Mantle surface of a printing cylinder of printing presses, by printing material contact partially worn differently in areas, according to the preamble of claim 1.
- the lateral surfaces of the sheet-guiding cylinders may come into contact with ink which has not completely dried.
- ink which has not completely dried.
- printing cylinders which are arranged in perfecting machines after the turning device, such contact in the production of double-sided sheet is technologically required.
- the outer surfaces of such pressure cylinder ink repellent In order to avoid the accumulation of printing ink on the lateral surfaces of the printing cylinder, designed the outer surfaces of such pressure cylinder ink repellent. This is achieved by the use of ink-repellent materials and by the creation of special structures which repel color and facilitate the removal of the printed sheets from the impression cylinder.
- DE 39 13 818 A1 discloses a sheet-guiding cylinder whose lateral surface is formed as an etched metal surface and has a wrinkled grain grid structure. From DE 199 14 136 A1 it is further known to produce on the surface of a sheet-guiding cylinder by coating with plasma an outward structure and to provide them with an organic, ink-repellent coating.
- the printing cylinders are progressive wear during operation of the printing presses as a result of the material removal caused by the contact with the printing material sheet exposed.
- the surfaces wear depending on the parameters of the respective Print jobs, in particular of the format of the printed sheet areawise differently. Accordingly, the areas close to the sheet holding systems of the impression cylinders are the lateral surface is usually exposed to greater wear than the rest Areas, because sheets are often processed whose format is smaller than the maximum possible format.
- the invention is based on the object, while avoiding the aforementioned disadvantages Method for repairing a paint-repellent sheet-guiding lateral surface of a Printing cylinder of printing machines to create that with built-in impression cylinder is feasible and for the implementation of which is not tailored to the specific case Materials are needed.
- the present invention has the advantage that it is suitable both for the repair of Pressure cylinders, the lateral surface thereof through the cylinder surface itself, as well as for impression cylinders, whose lateral surface formed by an applied to the printing cylinder elevator is, is suitable.
- the repair of the arch-carrying surface can be done with a built-in cylinder.
- materials are only a film which is formed in a conventional manner ink repellent, and adhesion promoter needed.
- a metrological determination of the shape error of the printing cylinder is not necessary, since the adhesion promoter is inevitably distributed by the line force applied by the pressure roller so that it compensates for the shape error.
- a pressure roller with applied film engageable pressure roller which is approximately dimensionally error-free, serves as normal, which is employed on the rotating with applied film foil pressure cylinder.
- a preferred embodiment of the invention provides, the pressure roller with the with applied film to keep in rotation rotating printing cylinder in contact until the bonding agent has hardened. This gives us the dimensional accuracy when applying the film in particular in such films, which are relatively rigid, further improved.
- a pressure roller Blanket cylinder provided, which together with the impression cylinder, the forme cylinder, the dampening and the inking unit forms a printing unit, which for this purpose with a hard Elevator is provided.
- the adhesion promoters used are preferably thermoplastics, in particular hot-melt adhesives.
- hot-melt adhesives from the group of ethylene-vinyl acetate copolymers which have a melting range between about 130 ° and 180 ° C., which can be adjusted by adding modified waxes, have proved to be suitable.
- the adhesive can also be used for the repair of printing cylinders, which is associated with an intermediate dryer and thus are exposed to increased heat load. To remove the film, the hot-melt adhesive only needs to be heated.
- hot-melt adhesives are preferably used with lower melting temperatures.
- hot-melt adhesives are not required to be completely removed when replacing a worn film with a new one, since adhesive remnants, once melted, can be used to attach a new film and the same Have properties such as newly applied hot-melt adhesive. It proves to be advantageous, especially when using hot-melt adhesive, not only to heat the hot-melt adhesive but also the printing cylinder, since hot-melt adhesives with a high melting temperature otherwise harden undesirably quickly on contact with the printing cylinder.
- Adhesive takes place in a simple manner by brushing or spraying.
- a further embodiment of the invention provides, the pressure cylinder during curing with applied Turn film in alternate directions to rotate, which is a back and forth the adhesion promoter in the gap formed by the printing cylinder and the film causes and thus promotes the distribution of the adhesive.
- the accompanying drawing shows a schematic representation of a double-sized pressure cylinder 4, the lateral surface (9) is repaired by means of the method according to the invention.
- the printing unit is part of an otherwise not shown printing machine, which includes a plurality of printing units and a turning device, which is arranged downstream of it in the sheet running direction.
- the printing cylinder 4 carries two gripper systems, which are formed from grippers 5 and gripper mounts 6 and fix the printing material on the leading edge, while they are transported by the printing gap between the printing cylinder 4 and blanket cylinder 2.
- foils 7 are arranged, which at their leading edges in a formed in the pressure cylinder 4 axially extending gap 11 are mounted and held at their trailing edges by a clamping device 10 and stretched in the circumferential direction become.
- the side facing away from the printing cylinder 4 of the films 7 has a rau Scheme Being Color-repellent surface, which forms the lateral surface (9) of the printing cylinder 4.
- the bonding agent 8 is applied, the shape error 12 of the printing cylinder 4 compensates and in the Rau structure of the lateral surface (9) is anchored.
- the lateral surface 9 of the printing cylinder 4 is repaired by the method according to the invention, if this as a result of continued contact with printing sheet such worn, that the required print quality is no longer achieved.
- the surface of the printing cylinder 4 is cleaned, to which end, in the event that a film 7 is already mounted on the surface, the film 7 is removed before cleaning.
- the printing cylinder 4 is offset with applied film 7 in a circumferential rotational movement and the rotating blanket cylinder 7, on which a hard elevator was attached 3, gradually hired to the impression cylinder 4 to a pressure between 0.05 and 0.2 mm.
- the printing pressure is increased in small steps until the specified values are reached, with the printing cylinder 4 making several revolutions after every change in the pressure.
- the bonding agent 8 is evenly distributed, which cures gradually at a constant volume and compensates for the shape error 12 of the impression cylinder 4.
- the attachment of the film 7 takes place solely on the bonding agent 8.
- the thickness of the applied film 7 is less than or equal to 0.3 mm, so that the printing press after repair of the jacket surface 9 substrates with Thickness in the range can print up to 1 mm.
Landscapes
- Printing Plates And Materials Therefor (AREA)
- Printing Methods (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003141372 DE10341372A1 (de) | 2003-09-09 | 2003-09-09 | Verfahren zur Instandsetzung einer bogenführenden Mantelfläche eines Druckzylinders von Druckmaschinen |
| DE10341372 | 2003-09-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1514697A2 true EP1514697A2 (fr) | 2005-03-16 |
| EP1514697A3 EP1514697A3 (fr) | 2005-11-09 |
| EP1514697B1 EP1514697B1 (fr) | 2008-02-27 |
Family
ID=34129693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040021091 Expired - Fee Related EP1514697B1 (fr) | 2003-09-09 | 2004-09-04 | Procédé de restauration de la surface d'un cylindre d'impression dans les machines d'impression |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1514697B1 (fr) |
| DE (2) | DE10341372A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2105485A1 (fr) * | 2008-03-26 | 2009-09-30 | Sika Technology AG | Composition à deux composants dotée d'un produit de contrôle de mélange |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD206905A3 (de) * | 1982-02-24 | 1984-02-08 | Polygraph Leipzig | Formmasse zur instandsetzung von druckzylindern |
| DE4329125C1 (de) * | 1993-08-30 | 1995-01-05 | Heidelberger Druckmasch Ag | Einrichtung zum Erneuern einer Druckfolie auf der Mantelfläche eines Formzylinders |
| DE4320069A1 (de) * | 1993-06-17 | 1995-01-12 | Roland Man Druckmasch | Verfahren und Vorrichtung zur Reparatur von Zylindern von Druckmaschinen |
-
2003
- 2003-09-09 DE DE2003141372 patent/DE10341372A1/de not_active Withdrawn
-
2004
- 2004-09-04 DE DE200450006301 patent/DE502004006301D1/de active Active
- 2004-09-04 EP EP20040021091 patent/EP1514697B1/fr not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD206905A3 (de) * | 1982-02-24 | 1984-02-08 | Polygraph Leipzig | Formmasse zur instandsetzung von druckzylindern |
| DE4320069A1 (de) * | 1993-06-17 | 1995-01-12 | Roland Man Druckmasch | Verfahren und Vorrichtung zur Reparatur von Zylindern von Druckmaschinen |
| DE4329125C1 (de) * | 1993-08-30 | 1995-01-05 | Heidelberger Druckmasch Ag | Einrichtung zum Erneuern einer Druckfolie auf der Mantelfläche eines Formzylinders |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2105485A1 (fr) * | 2008-03-26 | 2009-09-30 | Sika Technology AG | Composition à deux composants dotée d'un produit de contrôle de mélange |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1514697A3 (fr) | 2005-11-09 |
| DE10341372A1 (de) | 2005-03-31 |
| EP1514697B1 (fr) | 2008-02-27 |
| DE502004006301D1 (de) | 2008-04-10 |
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