EP1440351A1 - Satellite printing machine - Google Patents

Satellite printing machine

Info

Publication number
EP1440351A1
EP1440351A1 EP03766350A EP03766350A EP1440351A1 EP 1440351 A1 EP1440351 A1 EP 1440351A1 EP 03766350 A EP03766350 A EP 03766350A EP 03766350 A EP03766350 A EP 03766350A EP 1440351 A1 EP1440351 A1 EP 1440351A1
Authority
EP
European Patent Office
Prior art keywords
printing
digital printing
characterized
preceding
printing machine
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
Application number
EP03766350A
Other languages
German (de)
French (fr)
Other versions
EP1440351B1 (en
Inventor
Ebe Hesterman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schober GmbH Werkzeug- und Maschinenbau
Original Assignee
Ebe Hesterman
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE10235872 priority Critical
Priority to DE10235872A priority patent/DE10235872A1/en
Application filed by Ebe Hesterman filed Critical Ebe Hesterman
Priority to PCT/EP2003/008382 priority patent/WO2004013704A1/en
Publication of EP1440351A1 publication Critical patent/EP1440351A1/en
Application granted granted Critical
Publication of EP1440351B1 publication Critical patent/EP1440351B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/65Apparatus which relate to the handling of copy material
    • G03G15/6555Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/22Clamps or grippers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00Actions or mechanisms not otherwise provided for
    • B41J2025/008Actions or mechanisms not otherwise provided for comprising a plurality of print heads placed around a drum

Abstract

The invention relates to a digital printing machine for direct, contactless printing of sheets, comprising a digital printing group which is formatfree in peripheral direction and a conveyor device connected downstream of the digital printing group, wherein the conveyor device has sheet grippers in the periphery thereof. Counter-pressure cylinders for conventional technology can be positioned between the sections of bands and/or belts.

Description

Satellite printing machine

The invention relates to a device for direct digital printing in single-pass method of multi-color images on sheets in the recto and / or verso printing.

At the time of packaging and label printing are the growth markets. It is expected that the packaging market, doubled in the next 5 years under the influence of Eastern Europe, Southeast Asia and China being increasingly plastics, sandwich materials and metalized substrates. Worldwide sales for packaging printing machines is around one billion euros (German printer no. 4 of 06/02/03).

Especially in the packaging market with the highest quality demands are made, both in print and in the finishing. In the commercial (Commercial) is almost everything printed with standard process colors, ev. Is extended with customer-specific Pantone color. In packaging printing much more Pantone colors are used exclusively or more to complement the process colors.

Conventional offset presses are divided by size classes the maximum sheets to be printed format. The variety is given by:

Small Format 353 x 500 (B3)

Half-size 500 x 707 (B2)

Medium format 707 x 1000 (Bl)

Large format lOOOx 1414 (B0)

In conventional sheet-fed printing machine according to the offset or letterpress printing process, image-carrying plates are used, depending on the format class, which must be replaced at Patterned or order change. The Bebilderungs- or plate cylinders are equipped with a well to format-dependent tensioning passage and usually with elaborate, semi-automatic plate exchanging systems.

During printing, the four process colors cyan, magenta, yellow and black (C, M, Y, K) can be extended with a custom special color in the standard. With the CYMK color space, it is easily possible that the Pantone reference value can not be adjusted. To reach a wider range of colors in multicolor printing, complementary red, green and blue are increasingly additionally (RGB) in 7-color HIFICOLOR system or the additional colors orange and green colors at 6 Hexachromen systems used. This is also associated with the advantage that 95% of the Pantone colors can be printed without the hitherto associated time-consuming cleaning of the printing units during job changes. This is also confirmed by the increased use of sheetfed '8 and 10 printing units, not only for two-sided four-color printing, but also by screen printing with additional colors for these so-called high-pressure Fidility.

The system is very precise (+ 0.1 mm), characterized that the substrate be oriented sheets in the installation at a standstill by means of side and front lay.

The transfer of the printed sheets from the feeder pile for the first printing mechanism from printing unit to printing unit and from the last printing unit to the delivery pile is carried out with gripper technology, which are integrated format based in the impression cylinder channel or a chain carriage. That is, the distance from the gripper system for the next gripper system is always equal to the maximum print format in the peripheral direction.

In the printing presses increasingly format bound flexo coating units are integrated as a remarkable increase in the quality of prints, with the help of an applied lacquer layer, for example for the protection of the printing and improve the print processing or eg spot lacquering for optical effects.

Another development is the application of primer (primer in the flexo process) before and after printing because of being able to print, for example, to plastics with hybrid printing systems, ie the combination of different printing process in a printing press (US 6,443,058 Bl).

It can also recently NIP method for personalizing (DE 100 47 040 AI), punching units (DE 101 47 486 AI) for further processing, stamping units for haptic effects (look and feel) and inline finishing (EP 80924091 Al), for example, for folding, are integrated in the squad of process bundling. The combination of high-quality printing, finishing and processing method described above also requires relatively expensive drying systems, bringing machine lengths of up to 35 meters (Druckspiegel no. 5 May 2002 SM Type CD 102 LY-6-LYYLX at the company. Thomas situated in Gelsenkirchen and loud COMPRESS Magazine of 16 April 2003 a Rapida 142 sheetfed press in the format 102x140 with a length of 37.5 tr., and in Illinois (USA). This machine is equipped with seven offset printing units, a varnish printing, intermediate drying, other two paint printing units, intermediate dryer and last printing unit equipped arise including turning device). This very complex machines require, among other things expensive automation and drive concepts, eg with dual drives with gear train and drive shaft and also several intermediate and Endtrocknern (DE 199 12 309 AI). Without this technique would not be manageable.

Further perfecting systems are often integrated into the sheet-fed presses to print in one pass front and back. The space is very large reasons mentioned above, which provides, inter alia, the desired one-man operation for large problems and new investment brings with it for the expansion of the company building. In the conventional machines in miniature compact machines are used in Satelittenbauart, wherein the number of the printing units is limited to. 4 In the small, half, medium and large format so modular structures are used in-line design very often, have your own kit module for each printing unit.

In both conventional machine concepts format-related conventional offset or letterpress printing plate cylinder to be used with the clamping channel. From Figures 15 and 16 it can be seen that in this concept in the use of 2 7 printing units of half-size portrait (345 mm diameter), it will lead to ergonomically unrealistic dimensions and Modulare- and satellite design additional modules, such as roll processing, or for refining, processing width is equally unrealistic.

If this technical effort of conventional printing techniques is considered in the future expectation that under the influence of "POD" (print on demand or on-demand printing) and Just-in-time production 90% of all commercial web and an essential part of packaging printing orders less need than 5,000 sheets, it is the other printing machine concepts must be invented clearly to the future can still produce economically.

With digital printing machines is the state of the art in general, which provides an almost offset-like quality with maximum flexibility because each sheet if necessary with a different motif can be printed continuously (without loss of set-up time), ie without plate change. This digital printing method is very suitable for printing small runs with small formats (still ax. A3 + format, 330 x 460 mm).

Digital printing machines have mostly paper transport systems, eg via conveyor belts (DE 195 36 309 AI). It can be used (with the exception of WO 96/17277) no gripper for transfer of the sheet. With respect to the required precision of the color register (+ 0.01 mm) and plant register

(+ 0.1 mm) are thereby limited. - to accepting tolerances of investment and transfer register

(Color registers) are greater than in printing methods with conventional investment and gripper technique such generally by about a factor of 2 to. 4 B. sheetfed offset printing. Through these large tolerances (image drift) in the digital printing demands elaborate systems to if at all possible, to compensate for these tolerances (image drift) in the inline finishing.

A greater use of digital printing machines with very suitable for the POD market techniques are urgently required. The limited technical concepts impede further use in the graphic arts industry (Report Pira International Ltd. 2002 ISBN 185824641) The limitation of the claw-less digital machines located mainly in limiting to format size, production speed, substrate flexibility and feed registration.

The invention is based on the task of developing a new generation of printing presses in order to meet the new market requirements with absolutely the highest quality at lowest print runs in POD and Just in Time system, the advantages must be exploited in each of the conventional sheetfed offset technology and new digital technology, to provide in the future a cost-effective production safely. The requirements are as follows: 1. 1 to 7 to the digital printing units with an upstream station for cleaning hexachrome or HiFi color printing single pass method;

2. with integrated finishing with protective lacquer (100% of the packages need sided resist) and

, alternatively paint finishes entire surface for Akzidenzdruckwerke and / or special spot effect varnish. (About 20 - 30% of the orders in the commercial printing painted);

3. with possibility of personalization, or printing of variable data;

4 with a format larger class as the small size (about 36 x 50 cm), advantageously in the 50 x 70, 70 x 100 format;

5. with the possibility of printing on plastic and sandwich substrates;

6. with full-format duplex printing on the front and back without turning, at full production speed. (In commercial printing about 90 duplex is printed and printed on the packaging about 5 to 10 and / or refined, (eg back pressure with instructions, security features or protective coating, or a coating for the inside of the package).

7. with quality Bogenanlage- and gripper sheet transport systems for sheet offset similar investment and transfer register with minimal gripper change, or gripper transfer;

8. quality arrangement of digital printing and display device in the so-called 7 o'clock position to allow a perfect undistorted printing process (tangent function);

9. quality arrangement and drive the digital printing units for extremely high register accuracy, both on one side for multi-color printing as well as between the front and back print.

10 straight (Slim) sheet guide for max. substrate flexibility; 11. stability with minimal operational vibration for optimum print quality;

12. smudge bowing;

13 good accessibility of the individual machine components;

14 with accurate register by grippers acquisition, inline finishing such. As hot foil stamping and / or punching and / or stapling or folding-line or inline bookbinding;

15th in a family of presses, the synergy of common parts, components and software for mass production full use of cost-effective production;

16 one size for one-man operation, advantageously a machine length of max. about 7 m and a machine height of max. approximately 2.75 m.

The CH 116 828 describes conventional offset printing with plate and blanket cylinders which are based format and thus both with clamping channels. A 2x 7-color printing machine in the medium format is both in the satellite, as well as in modular arrangement unrealistically large (see Figures 15 and 16). Change of design means the elaborate plate changing and mostly printing unit washing for other custom Pantone colors.

DE 100 47 040 AI are also not disclosed digital printing, offset printing units but which, although digitally exposed online but with conventional format-dependent plate and blanket cylinder with the above-mentioned disadvantages.

DE 21 15 790 Al also describes conventional offset and / or high-pressure process, that is, with format-related plate cylinder with chip channels and the above-mentioned disadvantages.

DE 199 12 309 Al shows an example of an over-long (25) modular machine (US 6,443,058 Bl). Furthermore, DE 100 47 040 Al shows a satellite arrangement with only 4 print stations and a switched-printing unit with coupling means required therefor. This machine needed for the reverse printing disadvantageously a second pass (about 90-95% of the commercial print are perfecting). And is unsuitable for 7 color print with subsequent finishing.

In DE 21 15 790 Al a design or printing machine concept is also shown, which permits duplex printing is possible in one operation, but it concerns here the combination of format-based plate imaging systems in combination with conventional format-based blanket cylinders. This design does not allow up to 2 x 7 to integrate printing, let alone of further modules for coating without the design of the operation point of view, or to the ergonomics exceeds the amount of handling (see Figure 15). This factor particularly plays a role, since digital printing units are based upon the electrophotography process to date at Portrait pressure processing (ie printing a page in portrait), as opposed to landscape printing process in conventional sheetfed offset (ie, output of a printed page in landscape mode). Moreover it is format-dependent illustrating cylinders or drums of accessibility found extra space be reserved, eg for plate and / or blanket changing. Therefore, the maximum (43 DE 03 796 AI) is at a satellite assembly 4 as printing units to be considered. The CH 116,828 also shows in the design format bound plate and blanket cylinder for clamping Bebilderungsplatten and blankets. The format-related technology does not allow expansion to the 2 printing units 7 with cleaning systems, much of additional works for processing.

In known satellite printing presses (WO 01/39976 Al) were not above requirements of digital printing into consideration with regard to the non-bound format illustrating cylinders. It is based on format-dependent imaging cylinder and therefore does not benefit from the possible very compact design, and in this inventive machine possible.

The US 5,016,056 discloses a sheet transport with no format-dependent gripper systems and does not go out of the very precise arc-gripper transport systems with protruding claw back, which would damage the imaging cylinder but by a vacuum strip that holds the sheet at the plant and does not survive. The production tolerances of the system register mark would also be expected, larger at Bogenanlage- and transport system, as in printing methods with conventional gripper technology with the factor of 2 to. 4 In addition, set with these non gripper system limits to the printing stock, sheet size and sheet thickness of the printing system. Also, the ends of the sheet are held by vacuum. This has the disadvantage that only sheets can be printed from a fixed circumferential length ( "Secure's the ends of a receiving sheet").

DE 195 36 359 Al shows an endless conveyor without gripper systems, which likewise can be expected with investment and transport registration tolerances that are greater by a factor of 2 to 4 than in arc investment and transport systems with conventional gripper technology.

The CH 116,828 allows a duplex printing in a single pass, but only at half the production speed, as "a sheet can be fed at least to every second revolution".

In known satellite printing machines

Gripper transporting devices according to the DE 43 03 796 A 1, the number of blanket and plate cylinder pairs around a printing cylinder, for reasons of accessibility to the printing units on four is limited so that for double-sided printing (duplex printing) a series arrangement of two pressure levels, or twin stations must be provided, which are connected via a turning unit, as is provided for example also in the US-PS-5,660, 108 and DE-PS 435 902. FIG.

are known for digital printing machines of different concepts for duplex printing (front and back side printing, or perfecting) z. B. about Wendetasche

(US 5, 552, 875) (associated with the risk of curvature, Jamming, damage, half of productivity, with limited grams Agen and not as precise), twin installation

(Connected to inflexibility, large investment and many gripper transfers) or systems with half the width or half screen.

Known for sheet printing presses turning systems (DE 298 07 663 Ul) for printing on the sheets on the recto and verso printing side (recto verso). These systems are complex, the machine go through its fixed position inflexible, are costly and require a white border (gripper edge) on both sides of the sheets. Moreover, the registering sheet guide (turning register) is extremely difficult, leading to inaccuracies. It also limits the substrate flexibility in the strength of the substrate.

Nevertheless, it is conceivable that for applications such. B. where only occasional duplex printing is required to integrate a conventional turning drum system, in which case the above-mentioned disadvantages have to be accepted.

EP 819 268 Bl discloses a digital printing mechanism using the so-called multi-pass system, wherein the intermediate cylinder, however, passes several times through the same nip and in a the built-up on the blanket cylinder multi-color image is transferred to the printing material in timed supply of the arc in so-called single-shot method. Productivity involved is therefore very low. The repeated transfer to the intermediate cylinder could have a negative impact on the register accuracy, for example by low Aufwölbungs / speed differences during multiple passage of the printing gaps. Of the

Imaging cylinder is equipped with a chip channel and is designed for removable disks, or Zylindereinfräsung for clamping or holding the plate. The so-called photo imaging plate must be replaced for reasons of wear regularly. This design means that it is bound format and thus when added to a satellite construction could take from accessibility reasons (change of plate and blanket) no more than four printing (DE 43 03 796 AI).

US 6,363,234 B2 provides a Satelittenbauform with format-dependent printing units / print engines before, from accessibility reasons to max. are limited. 4 It has a special turn of art, but which only works for half productivity.

There are a whole range of digital printing technologies to bring variable data in color on the substrate. The known methods are, inkjet, thermal transfer, dye sublimation, electrophotography, magnetography, ionography and Direct Imaging Technology (US 3,816,840).

In the inventive machine concept the uniqueness of the non-contact direct digital printing, z. innovatively utilized as the inkjet method that does not match the print length. The printing unit may be less than would require the printing length. This feature allows a very compact innovative design using gripper-arm transport systems for multi-color Hi-fi print on front and back, in combination with multiple paint application and with or without inline finishing single-pass system called in a production run. With absolutely minimal set-up times with optimum ergonomic operating conditions (very small footprint) and cost-effective manufacturing and operation.

However, this non-contact printing also has a particular advantage in the printing of unstable substrates when the can be printed when passing through several printing units with partial color with mechanical stress -in contact the substrate stretch and thus cause printing register inaccuracies.

The satellite printing machine according to the invention is central with Figure 1 or two Figure 2, provided transport cylinder, wherein a number of at least 1 up to ten satellite printing units can be allocated for the recto printing in the rotational direction between said one application cylinder or feed rollers having delivery system and the delivery system and with further 1 up to 10 satellite printing units can cooperate for the reverse printing. Such a machine design allows a single or multi-color straight printing and / or reverse printing on arc-shaped print material that can be printed in one pass without additional turning technology.

In advantageous embodiments, the printing press can be adjusted by radial displacement of the feed, compression, storage and dispensing cylinder of variable thicknesses of the substrates (arrow Y).

The compact design of the satellite printing machine enables a printing operation under uniform flow conditions for the printing material by exactly fitting with aligning inlet at a standstill by means of the known side and front lay, the intermediate cylinder happened in register. Therefore, the inventive satellite printing machine can print the sheets achieve high clock speeds and full printing speed, and high print quality and low makeready be achieved. With this system, a full-scale printing is both the recto and the verso printing width of the printing sheet is possible, with only only a required for the gripper end edge strip is required, the cylindrical circumference of the printing surface of the plate can not be detected. So that the paper loss is significantly reduced. The satellite printing machine is characterized also difficult manageable pressure material such as cardboard, plastic, multi-layer packaging o. The like. Suitable. This operation is performed without turning of the sheets, which also detailed register (passer) tolerances are achieved.

In an advantageous embodiment, the arrangement of the cylinders or chain transfer in the so-called. 7 o'clock is position so that the transfer only takes place after the full sheet format is printed, the so-called. Tangent function in the wrap, ie, acceleration and the associated pressure distortion to avoid. The 7 o'clock arrangement to handle, despite the set by de ergonomics compact dimensions of the machine and the max. Printing stock predetermined "lean" sheet guide.

It is essential to design the satellite printing machine in its conception so that they do for the simple combination of a movable line

Further processing station is. Are advantageously combined in this way with conventional gear drive servo motors, whereby the movability of the finishing units is given. The advantage of this process bundling is that the accuracy of the final products is increased and additional processing facilities can be saved. known digital printing machines that optimize ihren- flexible use by expanding the machine configuration with multiple paper investors and display shelves (sheet trays), taking but a lot of space (large footprint) through their horizontal arrangement and require several investors and expenses.

New and much simpler and more compact is a machine design with a vertical arrangement of the so-called Sheettrays for a single investor and for only one display at the smallest possible floor area (footprint) of the machine.

In a further inventive embodiment according to Figure 17, the grippers 18 transport device in the transport device is lowered (theoretically up to max. Below the Zyinderoberfläche) at the moment, is printed in the. Thus, the digital printing units can be set to the minimum distance to the substrate. In conventional printing methods, the grippers are not lowered.

The demonstrative excessive lowering in Figure 18 shows the deformation of the substrate. Another inventive detail is shown in FIG 19, wherein the cylinder is coated with an elastic material, such. For example, with self-adhesive rubber blanket to allow the necessary reduction, with minimal deformation of the substrate. Normally, inkjet heads are about 0.8 to 1 mm from the substrate adjusted. With a gripper backs of 2 to 3 mm, this elastic layer should permit a lowering from 1 to 2.2 mm at minimum deformation of the printing material. The deformation takes place anyway in the non-printing area, the so-called. Gripper white edge, so that no additional waste. It is conceivable that in addition to the effect of the elastic layer kompressibelen resilient elements are used is. Alternatively, the transport cylinder is an innovative vacuum transport belt provided with suction. Vacuum gripper with a lowerable sheet stops. The stop could such. B. be controlled via conventional curves, so that the stops be sunk during the printing operation in the conveyor belt. At this time, the sheets from the vacuum of the vacuum bar is retained beneath the perforated conveyor belt, so that no arc shifts occur. It is conceivable that the stops be sunk with a tilting and / or rotational movement.

The required precision of the linear movement of the transport device is 0.05 mm +. This precision can be reached by Tranportzylindern, but not with the usual today Tranportbändern or (tooth) belt. Conceivable that is so built up, the transport device, that the conveyor belt and / or the (tooth) belts used in the accurate clock to the machine. you drift now the tape and / or straps on, you could offset the path correction by an AC servo motor, ie the errors that the belt and / or belt still has is compensated by the engine. The engine is running not linear but curve after a small correction, which corrects the tape and / or straps with substrate in the forward movement.

The holding force on the belt and / or belts can safely make such. to keep intake air as used in perfecting systems. This is a matter of interpretation.

It is advantageous to separate the transport device into a plurality of sections, because different requirements are placed, z. As when printing and drying. When drying occurs radiation and heat and the digital printing high precision is required in the linear transport.

Advantageously, (is the only non-contact printing, z. B. InkJet used) only in the digital printing unit area, a separate belt and / or belt used with the above mentioned very precise drive with automatic correction.

For UV curing, for. As are special tapes known which are suitable for high radiation burden and allow even enough vacuum build-up. However, these bands are not precise enough suitable for digital printing.

The delivery drum system and positioned for optimal sheet transfer as high as possible to the conveyor belt. The conveyor belt has mechanical gripper and / or suction (as well as in the conventional reversing drums available). The transfer of mechanical grippers and vacuum gripper requires support with suction, and this prior art is in sheet turning system 56, 57, 58 FIG. 9

The sheet transfer with a swing feeder 7 is not as good as an insertion or feed conditioning system 81 that guides the substrate sheet on the vacuum belt 54th In the swing feeder grippers are used, which take up space in the Übergabetrommmel 75, or in the vacuum belt, or vacuum drum with suction air. In an advantageous embodiment with insertion system figure 8 no grippers are used. The sheet is driven against the concealable stops and are within the scope very accurate ± 0.05 mm and also laterally about ± 0.1 mm. When the stopper is only 0.5 mm high, can be a substrate sheet of 0.3 - Create 0.4 mm thickness. For this purpose, a known deck system between the stops is used (not shown).

There, where conventional printing units, for example, used for coating in the flexographic relief printing process, format-related back-up rolls may be arranged in order to stabilize the transport belt and / or to act as a kind of indirect counter roll (below the conveyor belt). These support rollers have the gripper Transferee recesses.

It is conceivable, as is the conventional conveyor belts or a plurality of belts are applied next to each other. Prior art are mechanical gripper. However, the execution is less suitable because the digital printing units then minimally must comply with the measure of the supernatant looper back to the substrate. Then each printing unit format-related back-up rolls would be needed, which would lead to the extension of the conveyor belt, which means instability and disadvantageously requiring additional space.

In the patent application US 2002/00980017 can be seen that for perfecting digital printing units are used which are not identical. A further inventive embodiment is the identical design even at perfecting the Bebilderungskassetten in that they or the machine is constructive with respect prepared, for. B. drive, hose fitting, etc, for the mounting, both of the drive and of the operating side, thereby a uniform design work for perfecting printing.

In the satellite printing machine printing units for recto and verso printing can be arranged sequentially, with or without a surface drying. Furthermore, a complete printing unit is installed per (process) color and thus the color separations in the so called SINGLE PASS SYSTEM in perfecting printing prints. At the inlet and / or outlet of the conveying device can in each case before and / or be integrated to the digital printing several variants and removal steps, for example in cassette units, for example, for the conditioning, coating, paint application, a special printing, drying and a subsequent moistening. For optimum ease of operation, the pressure and conditioning systems are arranged in cassette slots. For optimum accessibility in the working position inside the machine frame and in service position on operating side and / or drive side outside of the machine frame is given. In the stack of paper, a single feeder and a single display can be changed slightly different substrates and non-stop by means of so-called paper cassette Sheettrays.

A particularly advantageous effect of this innovative printing machine and this process is the very low power consumption, estimated only about 20% of the consumption of about 300 KW / St. one of the conventional printing machines having actuators for 35 mtr. Length, intermediate and Endtrocknern and temperature control systems for the printing units.

Another aspect is the integration of a corona treatment system into the machine so that plastics and / metallized and / or sandwich materials can be used without pretreatment.

a dryer 11 also is provided on the boom. Between two counter-pressure cylinder further, not shown transfer drums can be inserted. Between two counter-pressure cylinders, such as a chain transfer, not shown, could be inserted for a intercooling.

The presented arrangement of 6 or 7 with digital printing units 1 and 2 printing units for coatings is to be regarded as a basic version of this compact design. If further printing units may be necessary, even single stand with conventional and / or digital printing before or this multi-color frame can be placed. A possible Inline Finishing (manufacturing) may also be the complete production of end products such. B. stamped, punched, perforated, seamed and cut, normalize. The object underlying the invention is solved by a digital printing machine having the features of claim 1.

Further details and advantageous effects of the invention will become apparent from the following description and drawings, will illustrate the embodiments of the inventive satellite printing machine.

In the drawing:

Fig. 1 is a side view of the invention

Satellite printing machine with two central cylinders and transport with circumferentially arranged distributed satellite printing units for recto and verso printing having a feeder and a delivery sgn provided for the cartridge for printing. Sheettrays;

Figure 2 is a side view (Dito as shown in FIG. 1) with enlarged upper transport cylinder with associated pre-press and downstream finishing cassette and in-line processing system.

3 is an enlarged detail view of one of the cassette systems for finishing.

Figure 4 is a representation of the cassette systems for imaging in various working positions.

Figs. 5 and 6 shows a schematic diagram of the inventive satellite printing machine with a drive system in the sheet delivery; Figure 7 is a side view in principle to Figure 1, but with only one transfer cylinder..;

. Fig. 8 is a side view in principle as Fig 7, but with the conveyor belt instead of transport cylinders, and alternatively insertion system;

Figure 9 is a side view in principle as Fig 7, but in twin formation..;

Figure 10 is a side view in principle as Fig 8, but in twin formation..;

Figure 11 is a side view in principle as Figure 10, but with the turning device..;

Figure 12 is a side view in principle as Fig 7, but with the turning device..;

Figure 13 is a side view in principle as Fig 8, but with the turning device..;

FIG. 14 is a side view of the preliminary stacking system;

FIG. 15 is an imaginary double satellite printing machine;

Figure 16 is an imaginary modular printing machine in series construction.

FIG. 17 is a gripper system;

Figure 18 is a gripper system in the retracted position.

Figure 19 is coated with a gripper system transport cylinder with elastic material.

Figure 20 is a vacuum belt with vacuum grippers. a transport apparatus in plurality of sections, and Fig. 21;

1 shows a satellite 1 designated by the printing machine is shown, which has two conveyor cylinders 2a and 2b, with a cleaning system R and six satellite printing units S for multicolour recto printing. Also shown is a downstream finishing cassette unit. 13

The schematic diagram of the satellite printing machine 1 according to Fig. 1 showing its application preferably for sheet than in the region of the feed cylinder 3 detectable printing material, wherein the conveying cylinder 2 and the dispensing system 5 are formed with gripping Systems 12. The feed cylinder 3, an aligning table 7 is also arranged upstream of which is adjustable in transverse direction, in height, in the feeding direction and / or in an oblique direction to the feeding direction. It is also conceivable that locking means not shown are provided on the aligning table 7, with which the above-described changes in the feeding direction of the printing material can be executed. These adjustments can be made during operation of the satellite printing machine. 1 The alignment table is provided with vacuum conveyor belts, respective format-dependent penetration seals are arranged in the region of the table, that energy losses are avoided (not shown).

The concept of the machine 1 is designed so that the feed cylinder 3, transport cylinders 2a and 2b, imaging systems 40 (including the color supply unit 41) and dispensing cylinder 5 by means of eccentric bushings radially adjustable (arrow Y) to adapt during production to variably thick substrates. Likewise, linear displacements are possible.

In Figure 2 same as Figure 1 but with enlarged upper transport cylinder 2a, so that an additional cartridge unit for pre-print systems 9, z. B. for conditioning can be disposed. After printing, a cassette 13, z. For example, for finishing (z. B. paint application) is arranged.

Shown is also the station for inline

Processing unit 46 which is indicated with arrow G. movable

In an advantageous embodiment the operation of the engine 1, the delivery system 3 and the dispensing system 5 are arranged at substantially the same height distance above a support plane, so that an approximately horizontal operating level is defined. In the area of ​​the dispensing system 5 additional station 46 for in-line finishing, or further processing can be thus provided for a downstream further processing, so that the printing material in a conveying line for the coating, drying, stamping, punching, and the like. is forwarded. These vertical distances a simple loading and unloading of the engine 1 from the ground is possible. Shown are multiple possibilities for display of intermediates 48 or final products 47 with automatic advantageously stacker 53 in combination with multiple options for disposing of the waste (up 45, down 51 and into the interior 50).

is shown in Fig. 3 illustrates the support of one of the cassette units z. For example, for finishing 13 in the region of the machine frame. The cassette unit is supported on rails 35 and 37 of respective side stand of the machine frame 33rd On these tracks the cassette unit can be moved parallel 13. It is also conceivable that the satellite printing units S are shifted together with these rails. In the illustrated embodiment, for example, a linear ball bearing 34 and cam rollers 38 are provided for the respective rails as guides. The rail 35 has a set under traverse. For positionally accurate displacement of the imaging units 40 and 41 the two rails on a supporting strut 36 are connected so that the next to the machine frame and can be displaced opposite to the operating position traceable without any distortion.

In Figure 4, the cassette units such. For example, for imaging an imaging system 39 and 40 a color substrate supply unit 41 on. The imaging units in the cassette units 39 can be respectively moved to its print position on the transport cylinder 2 in the service position without the tilting of the cassette unit is required for a lifting Y. This increases the positional stability of the cassette units.

A single display (Figure 4) one of the feeder units for imaging 39 also illustrates the position of which in a generally designated 33 machine frame, wherein the cartridge unit 39 in the central region, that is, the working position is illustrated 42 and the right image side shows that the cassette unit parallel to the rotational axis of the can be displaced between the cylinder 2 in a lateral service position to the operating side 43 next to the machine frame (arrow K). It is also displayed in a service position for the drive side 44th

With this inventive concept of

Satellite printing machine 1 can be reached that up to ten satellite printing units for recto printing S and up to ten satellite printing units for verso printing can be assigned to W, which may be immediately adjacent to at construction more compact. The satellite printing machine is provided in particular for a full-size and double-sided printing of sheets, wherein the gripper systems 12 requires a minimal strip on the arch to access and so the paper losses are advantageously reduced. In FIGS. 5 and 6 in a schematic diagram of a drive concept in the field of the printing machine 1, the display system 14 and the punching device 27 is shown. Two driving motors are provided 18 and 19 for securing a synchronous drive, each with a contact-free gear train 22, wherein the gear teeth engage with a constant, even during the driving phase interval 23 without contact with each other. The teeth not be put to rest when a control error, for example, in software, could lead to undesired overload of the system and an immediate shutdown of the drive torque is required. With this gear train 23, the backup of the system to vibration and damage, in particular the gripper systems is achieved with little effort. With the play-free gear train 24, the synchronous processing of Patrizstanzzylinder Matrizstanzzylinder 26 and 25 is predetermined.

In Figure 7 is a schematic diagram, as Figure 1, but only for one-sided (simplex).

8 shows a designated 1 digital sheet-fed printing machine is shown comprising a conveyor belt 54, with a cleaning system R and six satellite printing units S for multicolour recto printing.

Also shown is the high-pressure upstream and downstream flexographic cassette unit 32 is shown with two intermediate dryer 11 and two end dryer. 11

The schematic diagram of the satellite printing machine 1 according to FIG. 8 shows their application for sheet than in the region of the feed cylinder 3 detectable printing material, wherein the feeding cylinder 3, with swing grippers 8 (alternatively, the insert feeder 81 to transport rollers 82), conveyor belt 54 and the dispensing system 5 having gripper systems 12 and / or suckers 59 are formed. The feed cylinder 3 (alternatively, the insert feeder 81) an aligning table 7 is also arranged upstream of, and is depicted in Figure 1 and described.

The insertion or advancement feeder 81 is different from the system with feed cylinder 3 with swing grippers 7, characterized in that the substrate sheet on the side lay 83 and feed rollers 83 is precise and applied directly against the stop 64th no grippers are used for this purpose and, accordingly, are not necessary gripping openings in the transfer drum 75 miles.

The sheet is taken over by the transfer drum 75 with integrated vacuum system 73 and vacuum gripper and fixed over the entire surface to the vacuum system. The first flexographic printing unit is used for. As for coating with white paint for plastics, to be dried to the following to the intermediate dryer. 11 Subsequently, for example, 6 inkjet heads are added that print the substrate contact and the second, z. , B. UV dryer to be dried. is then reacted with a second flexographic unit, 'z. B. applied a protective varnish to be dried with twice the final dryer. The acquisition of the arc takes place only after the whole sheet has been printed, to avoid distortion of the printed image by the grippers acquisition, which is the so-called. 7 o'clock position. On the lower circulating a cleaning system is still integrated. The support rollers shown below serve as an indirect counter-pressure cylinders for the flexographic high pressure works that are known to be in contact and work with pressure. These support rollers are based format and have a clamping channel. The vacuum gripper systems will be of limited use, z. As for thinner substrates, and z. As documents in the office until about max. 250 grams per m 2. Not shown are the anilox roller 30 and collecting blade 31, and they are drawn and described in Figure 3. It is conceivable that the vacuum box is slightly curved in the region of the pressure range up (not shown) (with a curvature) for optimal application of the substrate sheet , In Fig. 9 is a schematic diagram, as Figure 7, in a twin formation, with intermediate sheet turning device, with a rotary transfer drum 56, 58 and turning storage drum 57. The drum 56 is to be operated at different speeds.

Fig. 10 is a schematic diagram, as Figure 8, but with a conventional conveyor belt and format-related Supporting roller for each printing unit and downstream of the second printing unit for verso printing. The vacuum belt conveyors of Figure 8 could advantageously function here.

Fig. 11 is a schematic diagram, as Figure 10 but in twin arrangement with known turning devices 56, 57, 58 of Figure 9. This turning device can also be integrated in the position S / W of Figure 8. It is conceivable that the arrangement for transporting horizontally or in a Wye configuration can be positioned.

Fig. 12 is a schematic diagram, as Figure 10, but with the turning device 56, 57, 58 of Figure 9. In this embodiment, the production speed at perfecting printing is only 50%, but the investment is limited in that only one set of printing units is needed that can adapt to the demands for perfecting or perfecting printing to digital.

Fig. 13 is a schematic diagram, as Figure 7, but with the turning device and limitation in perfecting printing application, such as Figure 12.

In Fig. 14, a sheet feeder 6 is shown with is located next to device 61 Direction prestack. This allows the operator during production of a Sheettrays (Bedruckstoffkassette) 15, which is adjustable in its height 62 to load, which can then be automatically positioned at order change means of lateral displacement 60 in the investor. Thus it can be changed quickly and only an expensive suction head 59 is required. A further advantage is that the length of the machine is not increased.

In Fig. 15 an imaginary printing machine is in satellite design presented on the basis of the figure 1 of US 5,036,763. The imaginary printing press is expanded up to 2 x 7 printing units for Hi-Fi pressure. From the dimension can be seen that this machine already half-format (B2) he were to operate unrealistic extent in comparison with FIG. 2 In addition, the so-called S-wrap of the stop drum system configuration 92 does not meet the requirements of a slim paper run.

In Fig. 16 an equally imaginary printing press is shown in row modular construction. In an imaginary configuration as Figure 2 2 7 colors and paint plants and inline finishing totally unrealistic dimensions and non-economic investments a printing press would arise.

In Fig. 17, 18 and 19 a neck with lowering gripper systems is depicted. Shown are gripper shaft with Senkgreifer 67, back gripper 68, gripper pad 69, substrate 66, cylinder body 70 and eccentric gear 71. The gripper reduce only slightly from, only during the printing operation.

In Fig. 17, the gripper system is shown in working position for substrate transport 66, wherein the gripper back is above the cylinder surface and thus prevents a minimum distance of the digital printing units.

In Fig. 18, the Senkgreifersystem for better clarity in an exaggerated retracted position to happen is the digital printing units shown. The grippers 61 are now back below the processing surface, whereby the digital printing units can be set to minimum distance to the substrate. The reduction is demonstratively coated in order to show the theoretical deformation of the printing material.

In Fig. 19, the transport cylinder is coated with a self-adhesive rubber blanket. The properties of the resilient material allows a maximum lowering of the gripper with minimal deformation of the printing material.

Fig. 20 shows the vacuum belt 54 to vacuum gripper and lowerable stopper 64. After the substrate 66 is aligned to the stop, the substrate sheet 66 is gripped by suction air 65 / collected and sucked with vacuum fixed to the conveyor belt. At that moment the whole of the sheet is fixed by vacuum to the stop with the aid of z can. B. cam rollers 38 and z. B. eccentric gear 71 or z. B. curve 80 are lowered, so that the imaging systems, or digital printing such. As the inkjet heads are made as close as possible and necessary to the surface of the substrate. also to ensure an ideal airflow. This vacuum system will be beneficial to the air flow, which is critical in the inkjet method, impact. Instead of a perforated vacuum conveyor belt, also, could. B. a set of perforated be used timing belt 79th Are also possible attacks with Schrägeransatz 78, which is in itself a safe stop. The disadvantage is that the sheet deforms slightly, but which can be accommodated at the next delivery.

Fig. 21 is a schematic diagram, as Figure 8, but with a transport device having a plurality of sections, assembled from a combination of a plurality of bands and / or belt systems and impression cylinder. Satellite printing machine

transport cylinder

supply cylinder

blowing strip

discharge cylinder

sheet feeder

alignment table

swing gripper

Feeder unit for pre-print

cassette guide

dryer

gripper system

Cassette unit, for. As for finishing

Stacker

Bedruckstoffkassette

Lateral surface for heating

cassette tray

Drive printing press

Servo drive finishing station

delivery chain

sprocket display

Non-contact gear train

Without gear train

With backlash-free gear train

Matrizzylinder

Patrizzylinder

Punching and creasing device

Embossing and foil device

Seitenstanderkassette

anilox

chambered doctor blade

Lacquer application roller

Kickstand machine frame

Open linear ball bearing

Rail with traverse 36 supporting strut

37. rail

38. cam roller

39. cassette unit for imaging

40. imaging system

41. color substrate supply unit

42. cassette in the working position

43. Cartridge in service position operating side

44. Cartridge in service position drive side

45. suction hood

46. ​​Inline finishing station

47. Display blanks

die-cut 48. Display and / or finished sheet

49. Disposal upwards

50. Disposal of cylinder interior

51. Disposal down

52. chip channel

53. Non-stop pile delivery

54. Conveyor

55. support rollers

56. turnaround transfer cylinder with more variable speed

57. revolving storage drum

58. turn transfer drum

59. suction head

60. Lateral displacement

61. prestacker

62. setting height

63. Stop drum system

64. Vacuum gripper with lowering system

65. suction air

66. substrate

67. gripper shaft

68. looper back

69. gripper pad

70. cylinder body

71. Eccentric

72. elastic material 73rd Vacuum system such. B. vacuum drum or vacuum bar or

vacuum chamber

74 7 o'clock position 75 transfer drum 76 recess in the conveying belt 77 pin 78 stop 79 oblique toothed belt 80 curve 81 feed / insertion feeder 82 feed rollers 83 side lay

Claims

claims
1. Digital printing machine for direct contactless sheet printing with a free format in the circumferential direction digital printing unit, a downstream of the digital printing unit transport device, wherein the transport apparatus holding on its circumference, sheet gripper having.
2. Digital printing machine according to claim 1, characterized in that per part of a complete color satellite printing unit is installed, and thus at least four color separations in one run in the so-called single pass system in the recto and / or verso printing are printed.
3. Digital printing machine according to at least one of the preceding claims, characterized in that the digital printing units are arranged like satellites around the transport device.
4. Digital printing machine according to at least one of the preceding claims, characterized in that the transport device is a transport format related cylinder.
5. Digital printing machine, conveyor belt according to at least one of the preceding claims, characterized in that the transport device a format related.
6. Digital printing machine according to at least one of the preceding claims, characterized in that the transport device comprises a plurality of transport cylinders and / or conveyor belts and / or counter-pressure cylinder.
7. Digital printing machine according to at least one of the preceding claims, characterized in that the transport device called. Mechanical gripper, which can be lowered via a defined portion of the cylinder circumference, has.
8. Digital printing machine according to at least one of the preceding claims, characterized in that the transport device is at least partially coated with an elastic material and / or resilient elements, respectively fitted to the necessary lowering of the Senkgreifer.
9. Digital printing machine according to at least one of the preceding claims, characterized in that the transport device vacuum grippers, having retractable stop which can be lowered a defined part of the transport operation.
10. Digital printing machine are arranged in succession without a turning device according to at least one of the preceding claims, characterized in that the printing units for recto (S) and reverse printing (W).
11. Digital printing machine according to at least one of the preceding claims, characterized in that the transport device of a format variabelen sheet turning device is arranged downstream of at least one transfer cylinder, which can be operated at different speeds.
12. Digital printing machine according to at least one of the preceding claims, characterized in that the digital printing units are identical to both the recto and the verso printing.
13. Digital printing machine according to at least one of the preceding claims, characterized in that a plurality of printing systems of different printing processes in Format Free and / or format Hard embodiment can be used with this integrated counter-pressure roller and / or cleaning and / or conditioning and / or coating and / or fixation and / or drying and / or Widerbefeuchtung, etc ..
14. Digital printing machine according to at least one of the preceding claims, characterized in that the transport devices for face (S) and reverse printing
(W) have the same dimensions.
15. Digital printing machine according to at least one of the preceding claims, characterized in that the transport devices for face (S) and reverse printing
(W) have different dimensions.
16. Digital printing machine according to at least one of the preceding claims, characterized in that the blowing and / or Saugluftsysteme, z. B. associated with the transport devices, the transfer cylinder and / or in the feeder and delivery to the optimum sheet transport and flat application.
17. Digital printing machine according to at least one of the preceding claims, characterized in that the conveyor belt of format-based rollers having on the circumference of the gripper is supported receiving recesses.
18. Digital printing machine according to one of the preceding claims, characterized in that the printing units and Konditionierkassette each form cassette-shaped building blocks, which are displaceable from their operating position into a service position to the operating and / or drive side.
EP03766350A 2002-07-30 2003-07-29 Satellite printing machine Active EP1440351B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE10235872 2002-07-30
DE10235872A DE10235872A1 (en) 2002-07-30 2002-07-30 Satellite printing press for printing on sheet-like substrates
PCT/EP2003/008382 WO2004013704A1 (en) 2002-07-30 2003-07-29 Satellite printing machine

Publications (2)

Publication Number Publication Date
EP1440351A1 true EP1440351A1 (en) 2004-07-28
EP1440351B1 EP1440351B1 (en) 2009-04-01

Family

ID=30469467

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (6)

Country Link
US (1) US20050150408A1 (en)
EP (1) EP1440351B1 (en)
AT (1) AT427520T (en)
AU (1) AU2003253353A1 (en)
DE (2) DE10235872A1 (en)
WO (1) WO2004013704A1 (en)

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WO2004013704A1 (en) 2004-02-12
WO2004013704A8 (en) 2004-07-22
AT427520T (en) 2009-04-15
US20050150408A1 (en) 2005-07-14
DE10235872A1 (en) 2004-02-19
EP1440351B1 (en) 2009-04-01
AU2003253353A1 (en) 2004-02-23
DE50311369D1 (en) 2009-05-14

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