EP0620784B1 - Rotationsdruckmaschine - Google Patents
Rotationsdruckmaschine Download PDFInfo
- Publication number
- EP0620784B1 EP0620784B1 EP93912532A EP93912532A EP0620784B1 EP 0620784 B1 EP0620784 B1 EP 0620784B1 EP 93912532 A EP93912532 A EP 93912532A EP 93912532 A EP93912532 A EP 93912532A EP 0620784 B1 EP0620784 B1 EP 0620784B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- band
- accordance
- cylinder
- printing machine
- printing
- 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
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/20—Supports for bearings or supports for forme, offset, or impression cylinders
Definitions
- the invention relates to a rotary printing press with a forme cylinder which can be pressed relative to an impression cylinder and which is provided with a coloring device for supplying printing ink to the surface thereof.
- Such printing machines in particular rotogravure printing machines, are known from many publications and are described, for example, in Bruckmann's Handbuch der Drucktechnik, Kunststoff, 1976.
- Forged cylinders of greater width in particular those with a small circumference, bend so much under pressure that the paper transport is disturbed by folds. Furthermore, as a result of the deflection, the applied printing ink is no longer stripped evenly across the entire forme cylinder width by the doctor blade.
- roller bearings of the forme cylinders are overloaded by increased pressure loads and higher speeds, which often leads to premature bearing failure.
- the object of the invention is to avoid the above-mentioned disadvantages of the prior art and in particular in a rotary printing press of the type specified at the outset, to limit or prevent the deflection of the forme cylinder even with a larger width and with all the diameters used, to relieve the loadings on the forme cylinder, and to fill the ink cups on the surface of the forme cylinder with printing ink to ensure reliable in a short time.
- this object is achieved in that the forme cylinder rests on at least one tensioned flexible band, printing ink being fed into the gap between the band and the forme cylinder, which is distributed over the surface of the forme cylinder on the support surface on the band when the forme cylinder rotates , At the same time hydraulic lubrication of the bearing of the forme cylinder is formed on the belt.
- the flexible band can extend over the entire width of the forme cylinder or the printing web, or several such bands can be provided next to one another, with which different printing inks can be applied to different width sections of the forme cylinder independently of one another.
- the part over which the flexible belt is stretched is advantageously designed as a slide that can be moved in the machine frame in the pressing direction and is pressed against the impression roller with a force controlled by the bearing force sensor that the form cylinder bearings are relieved and the force is practical only thanks to the almost frictionless and low-wear hydraulic mounting of the forme cylinder on the flexible belt. This means that the size and direction of the bending forces acting on the forme cylinder are eliminated.
- the carriage can also perform a slow oscillating movement in the axial direction of the forme cylinder in order to prevent streak binding of the ink application.
- the flexible belt can also be designed as an endless belt which is guided over a plurality of deflection rollers.
- the belt can be movable over the deflection rollers relative to the surface of the forme cylinder.
- the axis position of the deflecting rollers can advantageously be changed to adjust the wrap angle and / or the pressing force.
- Fig. 1 shows a rotary printing press with a form cylinder 1, which carries a printing form on its surface, and which cooperates with an impression 4 and a printing web P, for example made of paper, plastic or fabric, which runs between the impression cylinder 1 and impression 4, is printed with a certain pressing force .
- the forme cylinder 1 which is provided with the printing form, for example an engraving, carries roller bearings 2 at its ends, which are provided with pins.
- the forme cylinder is positioned by means of the roller bearings 2 in the printing press in lateral guide pieces 3 of a machine frame 5 such that it is in the direction of the Presseurs 4, for example, can be moved vertically.
- a movable carriage 25 within the frame 5 under the forme cylinder 1 is covered with a flexible band 6 over the entire width of the forme cylinder.
- This tape can e.g. an elastic metallic foil, a woven fabric, a combination of different materials or the like.
- the band must have such flexibility that it adapts to the forme cylinder radius over a certain wrap angle 11 when the impression cylinder 4 and forme cylinder 1 are pressed together. This can be done, for example, by hydraulic cylinders 7 on the slide 25, with which the latter is pressed in the direction of the forme cylinder 1.
- printing ink is supplied via a distribution tube 9, which passes under the rotation of the driven forme cylinder 1 and forms a lubricating gap due to the hydrodynamic forces in the area of the wrap angle 11, which forms the band 6 from Form cylinder 1 separated by an ink film.
- Load cells 10 are provided under the forme cylinder bearings, which soften the bearing force of the bearings, consisting of the dead weight of the forme cylinder 1 and the pressure force of the impression roller 4, which are generated by pressure cylinders 40 can be generated, measure.
- the output signal of the load cells 10 controls the pressing force of the pressure cylinders 7 such that the band 6 is pressed against the forme cylinder 1 in such a way that the load cells 10 are relieved. This means that the forces which act on the forme cylinder 1 and cause a deflection are eliminated, so that the forme cylinder 1 practically no longer bends.
- the hydrodynamically generated force in the gap between band 6 and the surface of the forme cylinder 1 acts according to the law of hydrodynamic bearing lubrication distributed over the wrap angle 11 of the band 6.
- the doctor blade 30 strips the excess ink from the form cylinder 1 behind the support gap. This stripped ink is then fed back through holes 31 in the band or the slide 25 into the slide 25 designed as an ink tank.
- the band 6 or the slide 25 can execute a slow oscillation movement C with a small amplitude in the axial direction of the forme cylinder 1 relative to the latter, in order to achieve a particularly uniform application of color over the width while avoiding streaking.
- Fig. 2 shows the embodiment of a rotary printing press shown in Fig. 1 with a forme cylinder 1 'of smaller diameter. Thanks to the conformability of the flexible band 6 to the forme cylinder 1 ', it is possible to use forme cylinders of different diameters in the same printing press, without having to carry out complex changeover work when changing the forme cylinder, by merely adjusting the slide 25 by means of the hydraulic cylinder 7 the radius difference of the forme cylinders 1 and 1 'is shifted.
- Fig. 3 shows an arrangement of the carriage 25, in which the band 6 is fixed at one end to a drum 12, which allows the effective length of the band 6 to be varied by winding the band 6.
- This makes it possible, together with the pressure cylinders 7, to adjust the wrap angle 11 of the band 6 around the forme cylinder 1 in such a way that an optimization can take place between the friction of the band bearing and the filling of the ink cups.
- the drum 12 is driven by a motor 13 or by hand via a gear 14.
- a particularly advantageous embodiment results if the motor 13 is designed in such a way that it generates an adjustable constant torque, the size of which is readjusted until the load cells 10 are relieved and the forme cylinder no longer has any deflection.
- Fig. 3 also shows the design of the belt bearing as a hydrostatic bearing instead of a hydrodynamic bearing as in the previous examples.
- a plurality of storage pockets 15, distributed over the width of the forme cylinder, are incorporated into the band 6, into which printing ink is conveyed from the ink tank 17 with pressure via one pump 16 per storage pocket.
- This arrangement has the advantage that the gap height of the lubricating gap between belt 6 and forme cylinder 1 can be set and varied by selecting the delivery volume of the pumps, which is not readily possible with hydrodynamic mounting. This can influence the power requirement of the forme cylinder drive, i.e. be reduced.
- the lubrication gap between belt 6 and forme cylinder 1 is also ensured when the machine is at a standstill, so that there is no contact between belt 6 and forme cylinder 1 even when the machine is at a standstill or starting, and thus possible damage to the engraving is avoided.
- the hydraulic pressure of the pump 41 for the support elements 42 can be regulated in relation to the oil pressure of the pressure cylinders 7 in such a way that the forces acting on the forme cylinder from below and above are the same and thus cancel out the bending forces .
- FIG. 4 shows a belt store which consists of a plurality of individual belts 26, 36, 46 which are arranged next to one another over the forme cylinder width, the belt width being selected such that it corresponds to a side to be printed.
- a sealing strip 18 is provided, which is pressed against the forme cylinder 1, for example with hydraulic cylinders 19.
- the Individual bands 26, 36, 46 can be pressed different colors via associated individual pumps, which are kept separate from one another by the sealing strips 18.
- Fig. 5 shows an embodiment in which the flexible belt 6 is designed as an endless belt which is movably guided over a plurality of deflection rollers 50, 51, 52. If the diameter is large, two deflection rollers can suffice, but three or more rollers are usually required.
- the band 6 is advantageously movable relative to the surface of the forme cylinder 1.
- the amount or layer thickness of the applied printing ink can be influenced or controlled in a simple manner by selecting or adjusting the relative speed between the belt 6 and the forme cylinder surface.
- the directions of movement of belt 6 and forme cylinder 1 can also be opposite to each other (reverse rolling), or in the same direction at different speeds.
- the belt 6 and the forme cylinder surface move at least approximately at the same speed, as a result of which friction and scratching of the forme cylinder surface due to hard particles washed into the gap 8 between the belt 6 and the forme cylinder 1 are avoided.
- the axes of the deflection rollers 50, 51 and 52 can be adjustable in their spatial position. In this way, on the one hand, the pressing force exerted by the belt 6 on the forme cylinder 1 can be varied and set, on the other hand, if necessary, the wrap angle of the belt 6 in the forme cylinder 1 can be changed from a value 55 by changing the position of the deflecting rollers from position 51, 52 to position 61, 62 be changed to another value 65.
- the arrangement of the deflection rollers 51, 52 can also be asymmetrical, for example in such a way that the outlet between the belt 6 and the forme cylinder 1 becomes relatively flat. In this way, foreign particles that have penetrated into the gap 8 can be easily and easily washed out again.
- a plurality of endless individual belts can be provided next to one another instead of a single endless belt across the forme cylinder width.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH03455/92A CH686822A5 (de) | 1992-11-09 | 1992-11-09 | Rotationsdruckmaschine. |
| CH3455/92 | 1992-11-09 | ||
| PCT/CH1993/000162 WO1993021015A1 (de) | 1992-11-09 | 1993-06-23 | Rotationsdruckmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0620784A1 EP0620784A1 (de) | 1994-10-26 |
| EP0620784B1 true EP0620784B1 (de) | 1996-10-09 |
Family
ID=4256317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93912532A Expired - Lifetime EP0620784B1 (de) | 1992-11-09 | 1993-06-23 | Rotationsdruckmaschine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5513566A (ja) |
| EP (1) | EP0620784B1 (ja) |
| JP (1) | JP2555268B2 (ja) |
| CH (1) | CH686822A5 (ja) |
| DE (2) | DE4239412C1 (ja) |
| ES (1) | ES2092311T3 (ja) |
| WO (1) | WO1993021015A1 (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060060008A1 (en) * | 2004-09-23 | 2006-03-23 | Sonoco Development, Inc. | Test device and method for roll weight capacity testing |
| US7222568B1 (en) * | 2005-12-23 | 2007-05-29 | Fischer & Krecke Gmbh & Co. | Method for flexographic multi-color printing using anilox rollers having different diameters |
| JP5994291B2 (ja) * | 2012-03-01 | 2016-09-21 | 大日本印刷株式会社 | 圧胴固定部材 |
| JP5989399B2 (ja) * | 2012-05-17 | 2016-09-07 | 住友重機械モダン株式会社 | 塗工装置 |
| US10233578B2 (en) | 2016-03-17 | 2019-03-19 | Card-Monroe Corp. | Tufting machine and method of tufting |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1140206B (de) * | 1962-11-29 | Richmond Va. Edward Ambrose Coudriet (V. St. A.) | Farbwerk für Rotationstiefdruckmaschinen | |
| US1115127A (en) * | 1913-08-07 | 1914-10-27 | Benjamin R Stickney | Web intaglio-printing press. |
| US2997951A (en) * | 1957-11-01 | 1961-08-29 | William F Huck | Wiping and polishing device for intaglio printing presses |
| GB1016131A (en) * | 1961-02-02 | 1966-01-05 | Almerindo Jamie Correia De Oli | Improvements relating to rotary machines for printing or coating fabrics or other sheet materials |
| US3853698A (en) * | 1972-04-17 | 1974-12-10 | Beloit Corp | Large roll hydraulic press with pressurized fluid supports |
| DE2421099A1 (de) * | 1974-05-02 | 1975-11-13 | Halley & Sons Ltd James | Druckmaschine |
| FI61147C (fi) * | 1979-07-05 | 1982-06-10 | Waertsilae Oy Ab | Anordning vid djuptrycksmaskin |
| CH680424A5 (ja) * | 1990-02-01 | 1992-08-31 | Escher Wyss Ag |
-
1992
- 1992-11-09 CH CH03455/92A patent/CH686822A5/de not_active IP Right Cessation
- 1992-11-17 DE DE4239412A patent/DE4239412C1/de not_active Expired - Fee Related
-
1993
- 1993-06-23 JP JP5517889A patent/JP2555268B2/ja not_active Expired - Lifetime
- 1993-06-23 US US08/167,928 patent/US5513566A/en not_active Expired - Fee Related
- 1993-06-23 DE DE59304129T patent/DE59304129D1/de not_active Expired - Fee Related
- 1993-06-23 WO PCT/CH1993/000162 patent/WO1993021015A1/de active IP Right Grant
- 1993-06-23 EP EP93912532A patent/EP0620784B1/de not_active Expired - Lifetime
- 1993-06-23 ES ES93912532T patent/ES2092311T3/es not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE4239412C1 (de) | 1994-04-21 |
| ES2092311T3 (es) | 1996-11-16 |
| WO1993021015A1 (de) | 1993-10-28 |
| CH686822A5 (de) | 1996-07-15 |
| JPH06503279A (ja) | 1994-04-14 |
| US5513566A (en) | 1996-05-07 |
| JP2555268B2 (ja) | 1996-11-20 |
| EP0620784A1 (de) | 1994-10-26 |
| DE59304129D1 (de) | 1996-11-14 |
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