DE102006019029A1 - Converting machine for sheet-type material particularly rotary printing press or varnishing machine, has impression cylinder and transfer cylinder formed as sheet guiding cylinder, and transfer cylinder has driving spindle - Google Patents

Abstract

The machine has impression cylinder and transfer cylinder formed as sheet guiding cylinder. The transfer cylinder (4) has a driving spindle (5) and two cylindrical disks (7) are arranged on the spindle with mediums, on the periphery, for covering every margin of the sheet-type material.

Description

The The invention relates to a processing machine for sheet material, in particular a rotary printing press or a varnishing machine, after The preamble of claim 1.

A processing machine of this kind is out EP 0 769 376 A1 as a sheet-fed printing press with printing cylinders with virtually closed surface, ie without cylinder channel known. The printing cylinder have circumferentially two arranged pressure segments for the sheet support and per pressure segment an axially parallel arranged, coupled to a vacuum source suction bar for the purpose of fixing the sheet leading edge. To realize the sheet transport act with the printing cylinders of the same size transfer cylinder for the purpose of sheet transfer or sheet transfer together. Each transfer cylinder has per print segment of the printing cylinder, a combination of coupled to a vacuum source, compliant suction pads and Tauchgreiferanordnungen. Since the respective adjacent pressure cylinder has no cylinder channel, the execution with ab- or emerging grippers to avoid collisions is necessary. Each submersible gripper arrangement is controlled by two cam gears each for opening and closing the gripper and for the removal or emergence of the gripper.

In an education can two transfer cylinders cooperating with one printing cylinder only with two compliant ones each; Paraxial suction strips (without mechanical Gripper) may be formed.

From Disadvantage is in these designs that in the transfer cylinders with suction bars and dip grippers the Training the cam controlled Tauchgreiferanordnungen relatively is expensive.

As well is disadvantageous that in transfer cylinders with exclusively arranged Suction pads no means to support the bowing or for consideration the format width of the sheet material are disclosed.

Out DE 196 29 370 A1 is a rotary printing machine is known, in which a device for surface treatment is arranged downstream in the conveying direction of the sheet material after the last printing unit. This device comprises a combination of so-called rotary conveyors and transfer drums, which are arranged in the arched area of the delivery area. The rotary conveyors and transfer drums have per se known grippers for the purpose of detecting a sheet edge. Each rotary conveyor is assigned a sheet guiding device outside its enveloping circle. Within the rotary conveyor drying devices can be arranged. Outside the transfer drums these dryer devices and a powder device can be assigned.

Of the Invention is the object of a processing machine of the type mentioned above, in whose bow guide cylinders the sheet transport under consideration bowing and the format width is improved.

The The object is achieved by the Training features of claim 1 solved. Developments result from the dependent ones Claims.

One The first advantage of the invention is that in particular the formed as a transfer cylinder sheet guiding cylinder in the processing machine the bowing improve. These are outside of the envelope circle the transfer cylinder no - on in sheet-fed rotary printing sheet-fed rotary varnishing machines known - sheet guiding necessary. According to the invention, everyone will Sheet at a sheet edge, for example, the sheet leading edge, by means of negative pressure (suction air) and in the circumferential direction at its two margins (i.e., those not printed / varnished / lacquered Edge zones of the sheet material) with means for detecting one each Forced edge of the sheet material. The positive guidance is preferably carried out by means of Negative pressure (suction air) at the circumference of the respective transfer cylinder. Each arc is thus transverse to an arc edge (i.e., paraxial to the axis of the sheet guiding cylinder) by means of negative pressure (suction bar) and in the circumferential direction at both margins while the rotation of the transfer cylinder partially or completely preferably fixed by suction (negative pressure). For bowing, the Transfer cylinder preferably with pressure cylinders in functional connection which are analogous to the transfer cylinders at the periphery transversely (in Axial direction) arranged suction strips or mechanical gripper systems as a sheet holding means. Alternatively, each sheet can be at one Arc edge by means of negative pressure (suction air) and in the circumferential direction held on its two margins with suction air by means of supporting elements, preferably needles, tips, puncturing agents, etc., at the respective Transfer cylinder fixed and thus be forced. The support elements are for the sake of forced guidance slightly above the enveloping circle formed protruding.

A second advantage results from the fact that the transfer cylinders by means preferably slidable in Zylinderachsrichtung, substantially cylindrical discs, in particular with a vacuum source coupled suction discs (with suction openings) or discs with circumferentially arranged, already mentioned above support elements, such as needles, Tips, puncture, etc., can be adapted to the respective format width of the sheet material. If necessary, for example, with large format widths of sheet material, several of these discs can be arranged on the cylinder axis. In addition to the two disks on the side edges of the sheet material, at least one additional such disk, for example in the middle format range, support the sheet material. Alternatively, these discs are adjustable to pressure-free zones of the sheet material.

One the third advantage is that that by the axially adjustable discs (with at the periphery arranged suction openings or with support elements) the respective sheet material is not symmetrical in the conveying direction the processing machine must be transported. Rather, it can - depending on Prior alignment of the sheet material in the contact area in the conveying direction (after the A or B side frame side of the machine) - towards the middle offset printed or painted.

When fourth advantage is to mention that this training of transfer cylinders for the Sheet transport of single or double-sided printed / lacquered sheets (Nice- or beautiful and reverse printing) can be used. Between the printing cylinders of the printing / coating works as well as in the jib can Such transfer cylinders individually or repeatedly in the conveying direction the sheet material can be arranged one behind the other. The impression cylinder are doing with at least one squeegee, with double-sized cylinders with two diametrically offset by 180 ° suction pads, formed for the purpose of fixing the sheet material to the sheet edge. The training is not on single or double-sized transfer cylinder limited. Alternatively, triple or quadruple transfer cylinders with am Circumference around 120 ° or offset by 90 ° multiple arranged Saugleisten realizable.

alternative can the printing cylinders (single or multiple size) with mechanical grippers be formed and the suction on the transfer cylinder are accordingly the gripper distribution recessed.

One fifth Advantage arises from the fact that the boom area by a Plurality of bow guide cylinders, specially transfer cylinders, is formed. At least one transfer cylinder may include at least one dryer device of any, including combined Type, for example, UV dryer, IR dryer, hot air dryer, etc. assigned be. Furthermore, at least one transfer cylinder can be a powdering device be assigned. Advantageously, the printing / Lacksujet the sheet material or the sheet material itself one-sided or both sides dried or hardened become. When arranging at least one powder device within the transfer cylinder with discs or at a defined distance outside to the transfer cylinder is not disturbing Gripper system present on the transfer cylinder, so that the sheet over its entire surface (a or both sides) can be powdered. The by conventional Gripper bridges conditional, Afflicted with "shadow" from the grabber bridge Powdering of the sheet material is thus obsolete.

When another advantage should be given that at least by the peripheral positive guidance on the discs not in the side edge area of the sheet material this sheet material more physical and fluidic resistors is exposed. The previous "flapping" of the bow in the trailing edge area is thus obsolete.

One Another advantage to be mentioned is that on the suction or discs none in conventional Sheet holding means, in particular gripper systems, or chains, chain guides, Curves, rollers etc. necessary lubrication is obsolete. This can be a possible Lubricant contact with the substrate to be avoided, the otherwise for pollution of the then diminished or worthless sheet material leads. Special advantages of this way of sheet guiding in packaging printing, for example Food, stimulants, medicines, etc. or at very high quality Printed matter, such as security and security printing.

It is with the inventive embodiment the sterile processing of the sheet material in companies that for example, processing food, semi-luxury foods or medicines, improved. In the processing machine, if necessary, the powdering device eliminated, so that the printing process can be realized dust-free can. The invention also represents a contribution to the "clean" printing house.

to Recording of the printing / coating quality can be done on a transfer cylinder forcibly guided with discs Bow an inspection device, in particular a camera for Quality detection contactless be assigned. Such a camera can be within the enveloping circle and / or outside of the envelope circle a transfer cylinder arranged at a defined distance be.

The Invention is intended to an embodiment be explained in more detail. Here are shown schematically:

1 a sheet-fed rotary printing machine with printing / coating unit and sheet guiding cylinders,

2 a sheet guiding cylinder in the Training as a transfer cylinder with discs,

3 a disc with circumferentially arranged suction openings (side view),

4 a disc with circumferentially arranged support elements (side view),

A sheet-fed rotary printing press has at least one printing unit I and in the conveying direction 16 downstream of the sheet material at least one coating unit II on ( 1 ). The printing works I For example, are offset printing and have a single-sized plate cylinder 3 and a single-sized blanket cylinder 2 on, which with a pressure cylinder 1 trained sheet guiding cylinder in functional connection can be brought on. The plate cylinder 3 is an inking unit (not shown) and associated with a dampening system as needed. The printing cylinder 1 is - based on a single-sized plate / blanket cylinder 3 . 2 - Double-sized and thus has two circumferentially offset by 180 °, diametrically opposed suction bars 6 as a sheet holding means for fixing the sheet material to a sheet edge by means of negative pressure. The suction bars 6 are axially parallel to the impression cylinder 1 arranged and are for example by means of a pressure cylinder 1 provided rotary feedthrough coupled to a suction air source.

The printing unit I follows in the conveying direction 16 as a sheet guiding cylinder a transfer cylinder 4 , which is also double-sized and analogous to the impression cylinder 1 two circumferentially offset by 180 °, arranged diametrically opposite suction strips 6 for fixing the sheet material to a sheet edge by means of negative pressure. The suction bars 6 are axially parallel to the transfer cylinder 4 arranged and are for example by means of a transfer cylinder 1 provided rotary feedthrough with a suction air source (vacuum source) coupled.

If necessary, a common suction air vacuum source for the pressure and transfer cylinder 1 . 4 be provided.

The transfer cylinder 4 is in the conveying direction 16 the coating plant II downstream. The coating plant II has a form cylinder 3 on which a metering system, for example, a chambered doctor blade with rastered applicator roll or a two- or three-roll mill, upstream. The form cylinder 3 is with one as a printing cylinder 1 trained sheet guiding cylinder in functional connection can be brought. The printing cylinder 1 is - based on a simple-sized form cylinder 3 - Double-sized and thus has two circumferentially offset by 180 °, diametrically opposed suction bars 6 for fixing the sheet material to a sheet edge. The suction bars 6 are axially parallel to the impression cylinder 1 arranged and are for example by means of a pressure cylinder 1 provided rotary feedthrough coupled to a Saugluft- / vacuum source. The coating plant II may alternatively be designed as a flexographic printing unit.

The coating plant II follows in the conveying direction 16 a boom III who can be trained in many ways. In the present example, the impression cylinder 1 of the coating plant II a plurality of transfer cylinders 4 in the conveying direction 16 downstream. In this case, at least one transfer cylinder 4 within and / or outside its envelope 18 at least one dryer device 12 be assigned. If necessary, at least one powdering device 13 within and / or outside the outer circle 18 at a defined distance to the transfer cylinder 4 be arranged. The powdering devices are preferred 13 above a transfer cylinder 4 arranged like this in 1 is shown.

In the conveying direction 16 last transfer cylinder 4 follows a conveyor 15 , For example, such a conveyor 15 a belt conveyor, the sheet material on a postponed delivery pile 14 stores.

Alternatively, the sheet material by means of conveyor 15 directly to a subsequent further processing station, such as a punching machine, are supplied.

Each of the transfer cylinders 4 has a drivable, arranged in bearings in each side frame shaft 5 on ( 2 ). On the wave 5 are preferably two supports 9 arranged at a distance to each other, which at the free ends depending one with the suction air source (vacuum source) coupled suction strip 6 wear. Alternatively, the suction bars 6 otherwise on the circumference, for example, the following discs 7 to be fixed. Each squeegee coupled to a vacuum source 6 has openings for sucking and fixing the sheet material to a sheet edge, preferably for detecting the sheet leading edge on. In 2 the arrows show the suction direction 10 at the top of the squeegee 6 , which is shown in the intake function. In contrast, the bottom suction is 6 inactive.

Continue to wear the shaft 5 gem. 2 at least two substantially cylindrical discs 7 with circumferentially arranged means 11 . 17 for the purpose of detecting one side edge of the sheet material.

In a first training are the means 11 mutually spaced openings 11 , The openings 11 in the slices 7 are with one Suction source (vacuum source) of the transfer cylinder 4 coupled. On the circumference carries each disc 7 a plurality of these spaced apart openings 11 to the respective side edge of the sheet material by means of suction (negative pressure) in addition to the squeegee 6 , which detects the sheet edge to fix. Thus, each sheet is at a sheet edge by means of a squeegee 6 and at least partially or completely fixed at least at the two side edges by means of negative pressure (depending on the position in the conveying direction 16 ).

The disks 7 are preferred in the axial direction of the shaft 5 , especially in the direction of displacement 8th , adjustable to the format width of the sheet material. The adjustment can be done by motor or manually. The disks are preferred for this purpose 7 at the circumference recesses 19 for receiving the suction bars 6 on.

The supply of the suction bars is preferred 6 and / or the discs 7 realized with suction (negative pressure) by means of a valve control. Preferably, the valve control is circuit-coupled with a machine control.

The drive of the transfer cylinder 4 can by means of the main drive and a closed gear train or self-powered by means of one at the shaft 5 arranged single drive done.

The effect is as follows: A bow is in the conveying direction 16 a printing unit I , especially its impression cylinder 1 , fed. The bow is at the sheet leading edge by means of a squeegee 6 alternatively by means of grippers, fixed by the pressure zone formed by the blanket cylinder 2 and the impression cylinder 1 led and to the orderly transfer cylinder 4 to hand over. In the transfer area, the transfer cylinder takes over 4 the bow by means of a valve control activated squeegee 6 , For printing cylinders 1 with grippers is every squeegee 6 of the transfer cylinder 4 executed according to the gripping pitch with recesses. Next to the squeegee 6 be the slices 7 In the circumferential direction with suction (negative pressure) applied, so that the arc on both side edges circumferentially on the discs 7 rests and fixed by suction (negative pressure) is guided. Here are the squeegee 6 and / or the discs 7 preferably angular correlated with suction acted upon. In 3 is this situation (without a bow) on a transfer cylinder 4 shown. In the example in 3 shown transfer cylinder 4 is always just a squeegee 6 , here's the bottom squeegee 6 and the following in the direction of rotation (arrow) openings 11 the discs 7 activated with negative pressure.

At the next handover, the bow is followed by a squeegee 6 , alternatively of grippers, of the printing cylinder 1 of the coating plant II taken over by the form cylinder 3 and impression cylinder 1 led paint gap formed and then to another transfer cylinder 4 , especially its activated squeegee 6 to hand over. After the transfer, the bow lays on the suction air (suction direction 10 ) acted openings 11 the discs 7 on and is fixed to the next, identical transfer cylinder 4 to hand over. This transfer cylinder 4 is at a defined distance outside the enveloping circle a dryer device 12 assigned for drying or curing of the printing ink or the paint. At the following identical transfer cylinder 4 is in addition to the wave 5 (lying inside) at least one, preferably two drying devices 12 between the two suction bars 6 arranged. At the following transfer cylinder 4 is a combination of internal drying equipment 12 and externally arranged drying devices 12 shown. Following this is in the conveying direction 16 at least one powder device 13 at a defined distance to the transfer cylinder 4 arranged. If necessary, at least one powdering device 13 on the wave 5 , ie lying inside, be arranged.

If necessary, at least one additional disc 7 with support elements 17 between the two discs 7 for detecting the respective side edge of the sheet material on the shaft 5 be arranged. Preferably, the at least one disc 7 paraxial in the direction of displacement 8th adjustable by motor or manually.

In a second embodiment, each transfer cylinder 4 the same, already described basic construction. Only the discs 7 indicate the circumference - instead of the openings 11 for Saugluftbetrieb - spaced apart support elements 17 on. The support elements 17 are preferably needles, tips, spikes, puncture, etc. and are on the discs 7 circumferentially at intervals to each other fixed or with respect to the shaft 5 arranged movable in the radial direction. The support elements 17 are slightly above the outer circle 18 of the transfer cylinder 4 out. In 4 For reasons of clarity, they are only a suction bar activated with negative pressure 6 , here the lower, activated squeegee 6 , as well as in the direction of rotation (arrow) subsequent support elements 17 on the circumference of the discs 7 shown.

The support elements 17 are for example two adjacent transfer cylinders 4 of the same design fixedly arranged and have staggered distances, the pitch of the respective adjacent transfer cylinder 4 consider. In one with at least one impression cylinder 1 cooperating transfer cylinder 4 are the ones on the circumference of the discs 7 arranged support elements 17 , For example by means of spring force, radially movable. Upon contact with the pressure cylinder jacket surface, in particular in the transfer area, the support elements dip 17 in the disk 7 one and after passing through the contact zone, the support elements are moved by spring force to the original position and there, for example by means of a stop, positioned. Analogous to the discs 7 with openings 11 for Saugluftbetrieb serve the support elements 17 the fixation of the two side edge regions of the sheet material.

The disks 7 with support elements 17 are also in the direction of displacement 8th adjustable. Furthermore, at least one additional disc 7 with support elements 17 between the discs 7 with support elements 17 for the margin area on the shaft 5 in the direction of displacement 8th be movably arranged. The support elements 17 can penetrate positively into the sheet material. The use of slices 7 with support elements 17 is preferred for thick or relatively rigid substrates useful.

The arrangements of drying equipment 12 and / or powdering facilities 13 are analogous to the first training already described feasible.

1

pressure cylinder

2

Blanket cylinder

3

Plate / form cylinder

4

transfer cylinder

5

wave (Transfer cylinder)

6

squeegee

7

disc

8th

displacement direction

9

support

10

suction

11

openings

12

drying device

13

powdering device

14

delivery pile

15

Conveyor

16

conveying direction (of the sheet material)

17

support element

18

enveloping circle

19

recess

I

printing unit

II

coating unit

III

boom

Claims (12)

Processing machine for sheet material, in particular a rotary printing press or a varnishing machine designed as a sheet guiding cylinder pressure cylinders and transfer cylinders, each pressure cylinder circumferentially sheet holding means and each transfer cylinder at least one coupled to a vacuum source suction strip for fixing an arc edge, characterized in that the transfer cylinder ( 4 ) a drivable shaft ( 5 ), and that on the shaft ( 5 ) at least two substantially cylindrical discs ( 7 ) with peripherally arranged means ( 11 ; 17 ) are arranged for detecting each of a side edge of the sheet material. Processing machine according to claim 1, characterized in that the means ( 11 ) arranged at intervals in the circumferential direction, coupled to a vacuum source and can be acted upon with negative pressure openings ( 11 ) are. Processing machine according to claim 1, characterized in that the means ( 17 ) arranged at intervals in the circumferential direction, slightly above an enveloping circle ( 18 ) of the discs ( 7 ) projecting support elements ( 17 ) are. Processing machine according to claim 1, characterized in that the discs ( 7 ) on the shaft ( 5 ) parallel to the axis in the direction of displacement ( 8th ) are adjustable. Processing machine according to claim 1, characterized in that the discs ( 7 ) at least one recess ( 19 ) for receiving at least one squeegee ( 6 ) having. Processing machine according to claim 1, characterized in that on the shaft ( 5 ) at least one circumferentially arranged suction strip ( 6 ) is fixed for the purpose of detecting the sheet edge. Processing machine according to claim 1 and 6, characterized in that the at least one suction strip ( 6 ) by means of supports ( 9 ) on the shaft ( 5 ) is fixed. Processing machine according to claim 1, characterized in that on the shaft ( 5 ) at least one drying device ( 12 ) within the envelope circle ( 18 ) of the transfer cylinder ( 4 ) is arranged. Processing machine according to claim 1, characterized in that the transfer cylinder ( 4 ) outside the outer circle ( 18 ) at a defined distance a drying device ( 12 ) is assigned adjacent. Processing machine according to claim 1, characterized in that the transfer cylinder ( 4 ) outside the outer circle ( 18 ) at a defined distance a powder device ( 13 ) is assigned adjacent. Processing machine according to claim 1, characterized in that between the two discs ( 7 ) on the shaft ( 3 ) at least one further disc ( 7 ) is arranged. Processing machine according to claim 1 and 11, characterized in that the at least one disc ( 7 ) on the shaft ( 3 ) parallel to the axis in the direction of displacement ( 8th ) is adjustable.