DE102008001541A1 - Web-fed printing system for printing of sequential webs coiled on material role for newspaper product, has tiltable printing unit pivoted around vertical axle into turned position that is pivoted at around ninety degrees to machine cover - Google Patents

Abstract

The system has a set of printing units (2) arranged in a machine cover perpendicular to parallely-adjusted rotation axles of pneumatic cylinders (4) of the printing units. A tiltable printing unit (6) is pivoted around a vertical axle into a turned position that is pivoted at around 90 degrees to the machine cover. A roll changer (1) is provided for printing units (2, 6), where the roll changer is parallely adjusted with longitudinal axles of material roles (3) of the rolled up courses.

Description

The The invention relates to a web-fed rotary printing press for printing continuous, wound on rolls of material webs with at least two printing units according to the preamble of Claim 1.

in the Newspaper printing mainly uses coldset systems. Under The term cold-dry is the simple way of beating the ink to understand in the paper, as in web offset newspaper printing the case is. The paint dries cold, so without any support by heat or radiation. It is also from a physical Drying or "Wegschlagen" spoken.

A completely different drying technique of the printing ink is the Heatset drying, as used in multicolor web offset commercial printing must be practiced, otherwise a further processing of the printed Paper web in the folder would not be possible. This is the mostly multicolored printed on both sides paper web dried in a hot air oven.

So-called "hybrid machines", combine heatset offset printing with coldset offset printing in one and the same machine. They enable more economical manufacturable printed products by only part of the total product on relatively expensive coated paper with heat-setting heatset inks, which are also expensive, is produced during the other part, usually the inner part of the product, on low-priced Standard newsprint can be printed without a dryer. Partially heatset dryers are placed above the printing units or with vertical web running direction arranged in the printing system.

A preferred and widespread installation variant in newspaper machines with coldset pressure for medium to larger Newspapers are the substructure line. In this variant, all Printing units arranged in parallel to each other in alignment. The roll changer are below the pressure units in a so-called roller basement set up or the printing units are on partially multi-storey Steel scaffolding on a concrete table above the roll changer established. In such a setup, the longitudinal axes run the material rolls in the reel splicers and the axes of rotation of the Pressure cylinder parallel to each other

From the DE 60 2004 009 578 T2 For example, a printing machine is known in which the printing unit is composed of a primary central module and two secondary modules. The secondary modules may be slid away from the central module to permit access of a person between the primary and secondary modules for cleaning or maintenance or to exchange the plates on one or more of the cylinders or other work. The secondary modules are arranged to be displaceable with a support frame. The displacement can be perpendicular to the axis of the cylinder or parallel to it by a motor drive.

From the WO 2007/020288 A1 a printing press system is known, which is designed so that it can be used in addition to the pure newspaper production for the production of mixed products and / or that newspaper products can be upgraded with originating from another machine layers or partial products. The plant comprises two printing machines, which are set up at an angle to each other. For example, different drying methods as well as completely different printing methods can be used on these two lines. The staggered tracks of the two printing presses can either be processed separately. One of the two offset by 90 ° to each other webs or partial webs thereof can be fed via a turning mechanism to each of the other printing machine associated folding unit.

Should individual printing units are equipped with drying devices, You can usually for geometrical reasons in a new plant to be planned Only one to a maximum of two lanes per system with heatset dryers equipment, a retrofit to existing equipment is due to the given space often not or if possible for a train possible.

Should now several webs are equipped with heatset drying, So often only the UV drying as an alternative. Curable with UV rays Printing inks are very expensive.

Also Infrared or electron beam drying currently do not deliver satisfactory results or are too expensive.

Of the Invention is based on the object, a web offset printing system to create a later easy conversion or upgrade individual printing units of this system, for example with a heatset dryer or other equipment, where turns of the freshly printed, undried material web to avoid, because these with quality losses and an increased railway breakage risk.

This object is achieved by a web-fed rotary printing press for printing continuous, wound on rolls of material Bah solved with at least two printing units with the features of claim 1.

In a web offset printing system are preferably a plurality of printing units arranged in a machine alignment, which is perpendicular to the axial direction the printing cylinder of the printing units runs. According to the invention at least one of these printing units about a vertical axis in one rotated position pivoted and lockable in this rotated position. The rotated position is preferably 90 ° to the machine flight added.

The particular advantages of the invention are that pressure equipment, for example, with decreasing utilization to convert relatively little effort to a greater production diversity to achieve a more profitable use of the printing plant.

In a preferred embodiment are also the printing units associated reel splitter with parallel alignment of their roller axes in the machine alignment, preferably arranged below the printing units. Either the reel changers in a so-called roll cellar or the printing units arranged on concrete tables.

Of the in the rotated position pivoted printing unit can, for example subordinate a heatset dryer.

One Embodiment of the invention is in the drawing and will be described in more detail below.

It demonstrate:

1 a web-fed rotary printing press in a side view;

2 the web-fed rotary printing press according to 1 in a top view.

1 shows a web-fed rotary printing press in a preferred embodiment in a side view while 2 a plan view of the system according to 1 represents.

Based on 1 and 2 The structure and mode of operation of the invention are explained below.

In the illustrated embodiment, there are five reel changers 01 and the roll changers 01 assigned printing units 02 arranged in a machine escape. Ie. the longitudinal axes of in the roll changers 01 clamped material rolls 03 and the longitudinal axes of the impression cylinders 04 the printing units 02 are aligned parallel to each other. The machine alignment is perpendicular to these longitudinal axes.

A swiveling pressure unit 06 is arranged in the web-fed rotary printing press offset by 90 ° to the machine alignment. A rotary arrow 07 indicates that this swiveling pressure unit 06 was pivoted from a position in the machine escape in a twisted position.

The printing units 02 ; 06 are on a concrete table 08 Installed.

The printed webs of the printing works 01 are printed directly into a superstructure after printing 09 a folding unit 11 guided.

In the illustrated system, only the first printing unit in the printing direction 06 pivoted in the twisted position. This swiveling pressure unit 06 is a heatset dryer 12 downstream. In modified embodiments, pressure units located farther back in the machine direction of flight can also be designed as pivotable pressure units and, if required, be pivoted into a position offset from the machine alignment. These printing units can then also assign dryer, as shown by dashed lines in the figures.

In the concrete table 08 is a recess 13 provided for the installation of a railway-wide turning bar 14 to allow the web needed by the printing unit 06 associated reel splicer 01 the pivoted printing unit 06 supply.

After the heatset dryer 12 Either a separate folder can be provided or the web is about two more turning bars the folding unit 11 fed.

Coldset printing is still possible with the modified web offset printing system, ie, with the printing unit pivoted, when the printed web of material passes directly over a turning bar 16 the superstructure 09 is supplied. However, due to the above-mentioned disadvantages of this arrangement, however, quality losses are to be accepted.

As long as a printing unit 02 should only be used as a coldset unit, it stands so that the train without turning in the superstructure 09 can be performed. If a heatset dryer is to be retrofitted, it is rotated 90 °, as indicated by the dashed lines and for the swiveled printing unit 06 already happened.

Of course, it does not matter which of the printing units 02 is rotated or planned pivotally.

01

reelstands

02

printing unit

03

media rolls

04

pressure cylinder

05

06

Printing unit swiveled

07

rotation arrow

08

concrete table

09

superstructure

10

11

folding

12

Dryer; Heatset dryer

13

recess

14

turning bar

15

16

turning bar

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 602004009578 T2 [0006]
• - WO 2007/020288 A1 [0007]

Claims (12)

Web-fed rotary printing press for continuous printing on material rolls ( 03 ) coiled webs with at least two printing units ( 02 ) with parallel alignment of the axes of rotation of the impression cylinder ( 04 ) of the printing units ( 02 ) are arranged in a machine alignment perpendicular to the axes of rotation, characterized in that at least one pivotable printing unit ( 06 ) is pivotable about a vertical axis in a rotated position. Web-fed rotary printing installation according to claim 1, characterized in that the pivotable printing unit ( 06 ) is detectable in the rotated position. Web-fed rotary printing machine according to claim 1 or 2, characterized in that the rotated position by 90 ° to Machine flight is pivoted. Web-fed rotary printing installation according to claim 1, 2 or 3, characterized in that the web-fed rotary printing system further comprises a reel splicer ( 01 ) per printing unit ( 02 ; 06 ), all reelstands ( 01 ) with parallel alignment of the longitudinal axes of the material rolls ( 03 ) are aligned in the machine alignment. Web-fed rotary printing installation according to claim 4, characterized in that the roll changers ( 01 ) below the printing units ( 02 ; 06 ) are arranged. Web-fed rotary printing installation according to claim 4, characterized in that the printing units ( 02 ; 06 ) on a concrete table ( 08 ) are stored. Web-fed rotary printing installation according to one of claims 1 to 6, characterized in that the pressure unit (in the rotated position) ( 06 ) a dryer ( 12 ) is subordinate. Web-fed rotary printing installation according to claim 7, characterized in that the dryer ( 12 ) a heatset dryer ( 12 ). Web-fed rotary printing installation according to one of claims 1 to 8, characterized in that in a first operating state all printing units ( 02 ) with parallel alignment of the axes of rotation of the printing cylinder ( 04 ) are arranged and in a second operating state, at least the pivoted printing unit ( 06 ) is detected in the rotated position. Web-fed rotary printing machine according to one of claims 1 to 9, characterized in that the web-fed rotary printing press further comprises a folding unit ( 11 ). Web-fed rotary printing installation according to one of claims 1 to 10, characterized in that the pivotable printing unit ( 06 ) in the first place in the row of printing units ( 02 ) is arranged. Web-fed rotary printing installation according to one of Claims 1 to 10, characterized in that the web-fed rotary printing installation has a plurality of pivotable printing units ( 06 ).