DE102007061074A1 - Processing machine i.e. sheet-fed printing machine, operating method for printing substrate, involves decoupling and coupling before decoupled components phase-synchronously and direction-synchronously - Google Patents

Abstract

The method involves checking whether changing movement of roller of before decoupled and now coupled components is phase synchronous and direction synchronous to changing movement of roller of other components. The before decoupled components are coupled, when a phase synchronicity and a direction synchronicity are determined. The before decoupled components are again decoupled and coupled phase-synchronously and direction-synchronously, when no phase synchronicity and a direction synchronicity are determined.

Description

The The invention relates to a method of operating a processing machine for printing materials the preamble of claim 1.

at Printing presses are the printing quality by vibrations and shocks disadvantageous affected. In particular, leads the traversing movement of iridescent rollers and rotating cylinders to such vibrations. Then, when the iridescent rolls a printing press, the traversing movements are not phase synchronous and not directionally synchronous, This can cause duplication and thus a reduction in print quality. It is therefore necessary that a disengaged assembly with At least one iridescent roller again and again in phase and synchronously engaged. This is with previously known Method for operating a printing press not guaranteed.

It Object of the invention, a method of the aforementioned Way of creating a clutch that was previously disengaged Assembly with at least one iridescent roller allows such that the traversing movement of the or each iridescent roller of previously disengaged and subsequently engaged assembly phase synchronous and directionally synchronous with the traversing motion of the or each iridescent Roller of the or any other assembly takes place.

The The object is achieved by a method having the features of the claim 1 solved.

According to the invention is in Following the engagement of a previously disengaged assembly, check that the Traversing movement of the or each iridescent roller of the previously disengaged and now coupled assembly phase synchronous and direction synchronous to the traversing movement of the or each iridescent roller of the or any other assembly is, in which case when a phase synchrony and directional synchrony detected is, the previously disengaged assembly remains engaged, and in which case, when this phase unbalance and / or Richtungsunsynchronität found is disengaged the previously disengaged assembly again and subsequently phase synchronous and direction synchronous is engaged.

With the method according to the invention can be guaranteed be that a disengaged assembly with at least one iridescent Again and again phase-locked and directionally synchronized roller becomes. For example, duplicating can occur in printing presses not phase-synchronous and / or not direction-synchronous engagement can be safely avoided.

To When engaging an assembly, the engagement position is checked. In order to In addition to the process-stable engagement, the safety of the drive system is additionally enhanced elevated. Furthermore, it becomes fast while avoiding waste and loss of production time the respective module phase synchronous and direction synchronous in the drive system of the processing machine engaged.

The inventive method can in conjunction with any drive system of the processing machine will be realized.

To a first drive principle, the drive system at least a main drive and a continuous or closed gear train include.

To a second drive principle, the drive system at least a main drive and a continuous or closed gear train for at least the cylinder leading the substrate and optionally the transfer cylinder include, wherein the second drive principle, at least one forme cylinder of a printing unit intrinsically motorized, d. H. mechanically separated from the continuous gear train, over one Direct drive is driven.

preferred Further developments of the invention will become apparent from the dependent claims and the following description. Embodiments of the invention without being limited to this to be closer to the drawing explained. Showing:

1 : a printing unit of a sheet-fed printing machine with a drive system, formed from main drive and gear train;

2 : a printing unit of a sheet-fed printing machine with a drive system, formed of main drive and gear train and separately driven form cylinder.

The present invention relates to a method for operating a processing machine for substrates, in particular a printing press. The method according to the invention will be described below with reference to FIG 1 and 2 described, wherein 1 and 2 a schematic diagram of a printing unit of a sheet-fed printing press.

So shows 1 a printing unit 1 a sheetfed press with an inking unit 2 , a dampening unit 3 , a form cylinder 4 , a transfer cylinder 5 and a printing cylinder 6 ,

The form cylinder 4 rolls on the transfer cylinder 5 and the transfer cylinder 5 on the printing cylinder 6 from. The cylinders 4 . 5 and 6 of the printing unit 1 as well as rollers of the inking unit 2 and rollers of the dampening unit 3 in 1 from a drive system with at least one main drive 7 and a closed gear train.

The inking unit 2 includes according to 1 a paint dosing device 8th , which in particular has a color box with dosing and a Farbduktor, a Farbzuführeinrichtung 9 according to 4 is designed as a color lifter, and a compactor, the Farbreiberwalzen 10 , Transfer rollers and inking rollers 11 is formed.

In the embodiment of 1 is, as already mentioned, the printing unit 1 integrated into the drive system, which has at least one main drive 7 and a continuous or closed gear train comprises. The main drive 7 of the drive system drives accordingly 1 the impression cylinder 6 , the transfer cylinder 5 , the form cylinder 4 as well as the inking unit 2 and the dampening unit 3 on, where 1 in the area of the inking unit 2 a drive wheel 12 shows, which with a drive wheel, not shown, of the forme cylinder 4 gearbox technology is coupled. According to 1 is the drive system from a machine control unit 13 driven.

In contrast, shows 2 a printing unit 1 a sheet-fed press, in which the main drive 7 of the drive system excluding the drive of the printing cylinder 6 and the transfer cylinder 5 serves. The form cylinder 4 is in the embodiment of 2 a direct drive 14 assigned to the form cylinder in the printing operation 4 self-powered. The inking unit 2 is in turn via a drive wheel 2 with a drive wheel, not shown, of the forme cylinder 4 coupled by transmission technology. The machine control unit 13 serves according to 2 the control of the main drive 7 and the direct drive 14 ,

The inking units 2 the printing works 1 of the 1 and 2 comprise several iridescent rollers, wherein the iridescent rollers are the inking rollers 10 is. The entire inking system 2 can with the iridescent ink rollers 10 be coupled by the drive system and disengaged, where it is important to ensure a high print quality, that in the engaged state, the iridescent Farbreiberwalzen 10 all printing units of a printing machine phase synchronous and direction synchronously perform their traversing movement. Guide the iridescent ink rollers 10 at least one inking unit 2 the traversing motion is not phase synchronous and / or not directionally synchronous, this can cause a duplication, which adversely affects the print quality.

For the purposes of the present invention, it is proposed, following the engagement of a previously disengaged inking unit 2 to check if the traversing movement of iridescent inking rollers 10 the previously disengaged and now engaged inking unit 2 is phase synchronous and directionally synchronous with the traversing motion of the iridescent inking rollers of the or each other inking unit. Then, when a phase synchronism and directional synchronism is detected, the previously disengaged inking remains 2 engaged.

On the other hand, if it is determined that there is phase discontinuity and / or directional unbalance, the previously disengaged inking becomes 2 disengaged again and then engaged in phase synchronous and direction synchronous. In the case where a Phasenunsynchronität and / or Richtungsunsynchronität is determined, is based on an actual value determined here and one in the machine control unit 13 stored reference value, the previously disengaged module disengaged again and then engaged in phase synchronous and direction synchronous.

Checking whether the traversing movement of iridescent inking rollers 10 the previously disengaged and now engaged inking unit 2 is phase synchronous and directionally synchronous to the traversing movement of the iridescent inking rollers of the or any other inking is done sensory, preferably with the aid of a sensor which a traversing gear of iridescent inking rollers 10 of the inking unit 2 assigned. This check is preferably carried out immediately after the engagement of the previously disengaged inking unit 2 at low engine speed.

As already stated, if after engaging a previously disengaged inking unit 2 a Phasenunsynchronität and / or Richtungsunsynchronität the traversing movement of the inking rollers 10 of the corresponding inking unit 2 to the inking rollers of the or any other inking unit is determined, the previously disengaged inking unit 2 disengaged again and on the basis of a determined actual value and one in the machine control unit 13 stored reference value again, namely phase synchronous and direction synchronous. Subsequently, the phase synchronism and Richtungssynchronität the traversing movement of the ink fountain rollers of all inking is checked again and, if necessary, carried out a new correction until the Farbreiberwalzen all inking their direction of motion and synchronous perform phase synchronous.

When carrying out the method according to the invention, the reference value is preferably detected on the drive system or a previously engaged inking unit. As a reference value, a rotation angle is preferably detected, wherein the sensor-detected reference value preferably in a reference signal sequence of the machine control unit 13 is supplied. Starting from the reference signal sequence is with the help of the machine control unit 13 For each inking unit, taking into account an angular offset for each inking unit, a reproduced signal value is generated as a reference value.

In the engaged state of the previously disengaged inking unit, an actual value, in particular a rotation angle, is detected at the same sensor and fed to the machine control unit. The machine control unit 13 checks whether the sensed actual value corresponds to the simulated signal value or simulated reference value or lies in a predetermined tolerance range, in particular predetermined angular range, about the same. If this is the case, it is concluded that phase synchronism and directional synchrony. Otherwise, there is no phase synchronism and directional synchrony.

1

printing unit

2

inking

3

dampening

4

form cylinder

5

transfer cylinder

6

pressure cylinder

7

main drive

8th

ink metering

9

ink supplement

10

Ink distributor roller

11

Inking roller

12

drive wheel

13

Engine control unit

14

direct drive

Claims (5)

Method for operating a processing machine for substrates, in particular a sheet-fed printing press, with a drive system and several to the drive system on / disengageable assemblies, in particular several on / disengageable inking units, each on / disengageable assembly has at least one iridescent roller, characterized in that is checked after engagement of a previously disengaged assembly, whether the traversing movement of the or each iridescent roller of the previously disengaged and now coupled assembly phase synchronous and directional to the traversing movement of the or each iridescent roller of the or any other assembly, in which case if a Phase synchronism and direction synchronism is detected, the previously disengaged assembly remains engaged, and in which case, if no phase synchronism and directional synchronism is detected, the previously disengaged assembly re-outdated ekuppelt and then phase synchronous and direction synchronously engaged. Method according to claim 1, characterized in that that if no phase synchrony and directional synchrony detected based on an actual value and a stored value Reference value disengaged the previously disengaged assembly again and subsequently phase synchronous and direction synchronous is engaged. Method according to claim 1 or 2, characterized that checking if the traversing movement of the or each iridescent roller before disengaged and now engaged assembly phase synchronous and Directional to the traversing movement of the or each iridescent Roller of the or any other assembly is sensory on one Transmission of the or each iridescent roller takes place. Method according to claim 3, characterized that here on the drive system or the previously engaged Assemblies sensory a reference value, in particular a rotation angle, detected and in a reference signal sequence of a machine control unit supplied becomes; that starting from the reference signal sequence by means of the machine control unit for every Assembly under consideration the angular offset of the individual units of the processing machine simulated signal value is generated as a reference value per module; that in the engaged state of the previously disengaged assembly at this sensory an actual value, in particular a rotation angle detected and supplied to the engine control unit; and that is checked in the engine control unit whether the actual value and the simulated reference value in a predetermined Tolerance range, in particular angle range lie. Method according to one of claims 1 to 4, characterized that the the review of phase synchronism and directional synchrony a lower engine speed occurs.