JP2007050697A - Method for operating printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new method for operating a printer which can save drive performance and minimize the loss of performance, on one hand and heat input to a printer, on the other hand at least by stopping an inking device. <P>SOLUTION: This method pertains to the operation of the printer equipped with a plurality of printing devices, especially a sheet printer. Each printing device comprises one impression cylinder (3), one transfer cylinder (2), one plate cylinder (1), one inking device (4), and one damping device (5) according to occasion. Further, at least one of the printing devices has an incorporated additional operating device (10) constituted especially as a varnishing device. In addition, each printing device is used for printing a printable material, with the inking device (4) selected, in a first operating mode, and the inking device (4) is used for an additional operation, especially varnishing to the printable material in a second operating mode. Besides, in the second operating mode, the inking device (4), and the damping device (5) according to occasion is disconnected and stopped on the drive side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for operating a printing press, particularly a sheet-fed printing press, as described in the first stage of claim 1.

  A sheet-fed printing machine has a plurality of printing devices, and a sheet-shaped substrate passes through these printing devices. At that time, one partial printing image with one printing ink in each of these printing devices. Is placed on the substrate. In addition to these printing apparatuses, the sheet-fed printing machine can also be provided with a varnish unit configured as a separate module, in which the varnish is applied onto the substrate.

  From Patent Document 1 and Patent Document 2, there is known a printing apparatus for a sheet-fed paper printer in which an additional working device configured as a varnish device is incorporated. The printing apparatus disclosed here is a printing ink. The operation can be performed in either the first operation mode for printing on the substrate or the second operation mode for applying varnish to the substrate. In the first operation mode, when one inking device of the printing apparatus is selected, the corresponding printing ink is applied to one printing plate attached to the plate cylinder of the printing apparatus. On the other hand, in the second operation mode, the ink device of each printing apparatus is deselected, so that printing ink is not applied to each printing plate by the ink apparatus.

According to Patent Document 1 and Patent Document 2, the ink device that has been deselected in the second operation mode is driven away from each plate cylinder of the printing device, but is continuously driven, so as to avoid damage to the rollers of the ink device. It is necessary to introduce printing oil into the inking unit. When the printing apparatus is operated again in the first operation mode later, printing ink is applied to the printing material in this mode. Therefore, it is necessary to remove the printing oil from the inking apparatus by cleaning the inking apparatus at high cost. This results in a relatively long set time. In order to drive the inking device in the second operating state, full driving performance is still required, so that loss performance on the one hand and heat on the other hand are generated in the printing device.
German Patent Application Publication No. 197299985 German utility model No. 202005003607

  In view of this point, an object of the present invention is to provide a new operation method of a printing press.

  This problem can be solved by the method described in claim 1. In the present invention, in the second operating mode, the inking device and possibly the dampening device are disconnected on the drive side and stopped.

  In the present invention, in the second operation mode, it is proposed that at least the ink device of the printing device is disconnected and stopped on the driving side. Thereby, driving performance can be saved. By stopping at least the inking device, the loss performance on the one hand and the heat input to the printing device on the other hand can be minimized. In addition, when the inking device is stopped, there is no need to fill the inking device with printing oil because the risk of damage to the rollers of the inking device is minimized. Thereby, when the printing apparatus is operated again in the first operation mode later, the setting time of the printing apparatus can be minimized.

  According to a preferred development of the invention, in the first operating mode, the impression cylinder, transfer cylinder, plate cylinder, inking device and possibly the dampening device are driven by the main drive of the printing press and in the second operating mode. The inking device and possibly the dampening device are disconnected from the main drive and stopped.

  According to a preferred alternative development of the invention, in the first operating mode, the impression cylinder, the transfer cylinder, the inking device and possibly the dampening device are driven by the main drive of the printing press, and the plate cylinder is in this plate cylinder. Driven by the assigned individual drive or direct drive, and in the second operating mode, the inking device and possibly the dampening device are disconnected from the main drive and stopped.

  Preferred developments of the invention can be seen from the dependent claims and the following description. An embodiment of the present invention will be described with reference to the drawings, but is not limited thereto.

  Hereinafter, the present invention will be described in detail with reference to FIG.

  FIG. 1 shows a part of the range of one printing device of a certain printing machine. Among the printing devices, a plate cylinder 1, a transfer cylinder 2, an impression cylinder 3, an ink device 4 and a dampening device 5 are shown. It is shown. On the plate cylinder 1 of the printing apparatus shown, at least one printing plate, in particular a printing plate, is arranged, so that the plate cylinder 1 is also called a plate cylinder. A transfer cylinder 2 rotates in contact with the plate cylinder 1, and a rubber blanket is attached to the transfer cylinder. This transfer cylinder 2 is also called a rubber cylinder. The transfer cylinder 2 rotates in contact with the impression cylinder 3, and this impression cylinder is also called a push cylinder. In FIG. 1, the contact rotation zone between the plate cylinder 1 and the rubber cylinder 2 is indicated by symbol 6, and the contact rotation zone between the transfer cylinder 2 and the impression cylinder 3 is indicated by symbol 7.

  Although the ink form rollers 8 of the ink device 4 of the printing apparatus are illustrated, these ink form rollers rotate in contact with the plate cylinder 1 in a state where the ink device is selected. Although the dampening roller 9 of the dampening device 5 is shown, this dampening roller rotates in contact with the plate cylinder 1 in the same manner in the state where the inking device is selected and in the state where the dampening device is selected.

  In the illustrated printing device, an additional working device 10 is also incorporated, which in the illustrated embodiment is configured as a varnishing device. The additional work device 10 includes a form roller 11 and a chamber doctor blade 12, and the form roller 11 rotates in contact with the transfer cylinder 2. The varnish is prepared in the chamber doctor blade 12 and transmitted to the rubber cylinder 2 through the form roller 11. In the illustrated embodiment, the additional working device 10 acts on the transfer cylinder 2 on the paper feeding device side. However, the additional working device 10 may be applied to the transfer cylinder 2 on the delivery side.

  The printing apparatus shown in FIG. 1 can be operated in two different operation modes. In the first operation mode in which the printing material is printed using the printing ink, the ink device 4 and the dampening device 5 are selected, and the additional work device 10 is deselected. In this first operating state, the ink form roller 8 and the water application roller 9 rotate in contact with the plate cylinder 1, the plate cylinder 1 contacts the transfer cylinder 2, and the transfer cylinder 2 rotates in contact with the impression cylinder 3. . On the other hand, the form roller 11 of the additional work device 10 is separated from the transfer cylinder 2 and does not rotate in contact with the transfer cylinder. In the second operation mode, the additional work device 10 is selected, and the inking device 4 and the dampening device 5 are deselected. In this second operation mode, the ink form roller 8 and the water form roller 9 are separated from the plate cylinder 1, and the plate cylinder 1 is also separated from the transfer cylinder 2. On the other hand, the form roller 11 of the additional work device 10 contacts the transfer cylinder 2 and rotates in contact with the transfer cylinder.

  In the present invention, it is proposed that at least the ink device 4 is disconnected on the driving side and stopped in the second operation state of the printing apparatus. Preferably, in the second operating state, the ink device 4 and the dampening device 5 are disconnected and stopped on the drive side, and then the ink form roller 8 and the water form roller 9 are separated from the plate cylinder 1.

  In the first variation of the present invention, in the first operation mode, the impression cylinder 3, the transfer cylinder 2, the plate cylinder 1, the ink device 4, and the dampening device 5 can be driven by the main drive device of the printing press. In the second operation mode, the ink device 4 and the dampening device 5 are disconnected from the main drive device and stopped. When the plate cylinder 1 is driven by the main drive device of the printing press, the plate cylinder 1 can be disconnected from the main drive device and stopped in the second operation state. In this case, an auxiliary drive device is assigned to the plate cylinder 1. In a state where the plate cylinder 1 is disconnected from the main driving device and in a state where the ink device and the dampening device are separated from the plate cylinder 1, the printing plate replacement of the plate cylinder 1 is performed using the auxiliary driving device. In addition, this can be performed in parallel with the operation of the additional work device 10.

  According to one alternative form of the invention, in the first mode of operation, the impression cylinder 3, the transfer cylinder 2, the inking device 4 and the dampening device 5 are driven by the main drive of the printing press, but on the other hand The cylinder 1 is driven by an individual drive device or a direct drive device assigned to the plate cylinder. In this case, in the second operating mode, the inking device 4 and the dampening device 5 are disconnected from the main drive device and stopped, and preferably the plate cylinder 1 is also controlled by controlling the individual drive device or the direct drive device accordingly. Stopped.

  In two alternative forms in the second operating state, as already mentioned, the inking roller 8 of the inking device 4 and the wetting roller 9 of the dampening device 5 are separated from the plate cylinder 1 and the printing drum 1 is moved from the transfer cylinder 2. Leave.

  In the present invention, the disconnection and stop of the inking device 4 and the dampening device 5 at the time of transition from the first operation mode to the second operation mode are automatically performed, that is, controlled by the machine control device of the printing press. Or controlled. The separation of the inking roller 8 of the inking device 4 and the wetting roller 9 of the dampening device 5 is also automatically performed by machine control. When shifting from the first operation mode to the second operation mode, the separation of the plate cylinder 1 from the transfer cylinder 2 is also automatically performed by machine control.

  In the reverse direction, that is, when the second operation mode is shifted to the first operation mode, the ink form roller 8 of the inking device 4 and the water application roller 9 of the dampening device 5 are automatically brought into contact with the plate cylinder 1. The same is true of bringing the plate cylinder 1 into contact with the transfer cylinder 2. When shifting from the second operation mode to the first operation mode, the additional work device 10 and the form roller 11 of the illustrated embodiment are automatically separated from the transfer cylinder 2 by machine control.

  In the second operating state, the additional working device 10 is preferably driven from the main drive of the printing press, so that the additional working device 10 is automatically connected to the main driving device on the drive side in the second operating state. On the other hand, when shifting from the second operation mode to the first operation mode, the additional work device 10 is disconnected from the main drive device and stopped.

  In a preferred embodiment, the additional working device 10 is configured as a varnishing device, and the additional work device's form roller 11 cooperates with the transfer cylinder 2. It should be pointed out here that an embodiment in which this additional working device is configured as a varnishing device cooperating with the plate cylinder 1 is also possible. The varnishing device can also be implemented as an anilox roller system rather than the chamber doctor blade system shown.

  The additional working device can also be implemented as a perforation device, an embossing device, or a slitting device. Further, the additional working device incorporated in the printing apparatus may be an ink jet apparatus, and the ink jet apparatus can individually print a printed material or a printed sheet directly or indirectly through a rubber cylinder.

  As described above, when the printing apparatus is operated in the second operation mode with the additional work apparatus 10 selected, the plate cylinder 1 is assigned with a self-drive apparatus, a direct drive apparatus, or an auxiliary drive apparatus. If it is, the plate exchange of the plate cylinder 1 can be performed automatically. Similarly, in the state where the additional work device 10 is selected in the second operation mode, the inking device can be automatically cleaned.

  Finally, it is pointed out that a printing press can comprise a plurality of printing devices with additional working devices incorporated in the printing device, each of which can be operated as described in the present invention. Keep it. At this time, for example, a varnishing device can be incorporated into one printing device of the printing press, and a punching device, a perforation device or an ink jet device can be incorporated into another printing device. Any combination is possible in this regard.

In order to clearly illustrate the method of the present invention, a printing device of a printing press is illustrated.

Explanation of symbols

1 Plate cylinder / plate cylinder 2 Transfer cylinder / rubber cylinder
3 Impression cylinder / Push cylinder
4 Inking machine
5 Dampening device
6 Contact rotation zone
7 Contact rotation zone
8 Inking roller
9 Swim roller 10 Additional working device 11 Fitting roller 12 Chamber doctor blade

Claims (8)

A method of operating a printing press, particularly a sheet-fed printing press, comprising a plurality of printing devices,
Each printing device has one impression cylinder (3), one transfer cylinder (2), one plate cylinder (1), one inking device (4) and possibly one dampening device (5). And
At least one of these printing devices incorporates an additional working device (10), particularly configured as a varnishing device, but the printing device is in a state in which the inking device (4) is selected in the first operating mode. Used for printing on the substrate, or in the second operation mode, with the inking device (4) deselected, for additional work, in particular for varnishing the substrate,
An operating method characterized in that in the second operating mode, the inking device (4) and possibly the dampening device (5) are disconnected and stopped on the drive side. The method of claim 1, comprising:
In the first operating mode, the impression cylinder (3), transfer cylinder (2), plate cylinder (1), inking device (4) and possibly dampening device (5) are driven via the main drive of the printing press. The operating method characterized in that the inking device (4) and possibly the dampening device (5) are disconnected from the main drive and stopped in the second operating mode. The method of claim 2, comprising:
In the second operating mode, the plate cylinder (1) is also disconnected from the main drive, and the plate cylinder (1) is stopped or is used to change the printing plate or to synchronize with the main drive. A driving method characterized by being driven by an auxiliary driving device assigned to the main driving device. The method of claim 1, comprising:
In the first mode of operation, the impression cylinder (3), transfer cylinder (2), inking device (4) and possibly dampening device (5) are driven via the main drive of the printing press, and the plate cylinder ( 1) is driven by an individual drive or direct drive assigned to the main drive, and in the second mode of operation, the inking device (4) and possibly the dampening device (5) are disconnected from the main drive. The driving method is characterized by being stopped. The method of claim 4, comprising:
An operation method characterized in that the plate cylinder (1) is also stopped in the second operation mode. A method according to one or more of the claims 1 to 5, comprising
In the second operation mode, the plate cylinder (1) is separated from the transfer cylinder (2), and the ink form roller (8) of the inking device (4) is separated from the plate cylinder (1). A method according to one or more of the claims 1 to 6, comprising:
A method of operation characterized in that the ink device (4) and possibly the dampening device (5) are automatically disconnected and stopped during the transition from the first operation mode to the second operation mode. A method according to one or more of the claims 1 to 7, comprising:
During the transition from the first operation mode to the second operation mode, the plate cylinder (1) is automatically separated from the transfer cylinder (2), and the ink form roller (8) of the inking device (4) is also automatically printed. A driving method characterized by leaving from (1).

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