DD221690A1 - ADJUSTMENT AND STOPPING DEVICE FOR COLOR WORKING POWERS IN PRINTING MACHINES - Google Patents

Abstract

The aim of the invention is to contribute to the ease of use of the inking units and to reduce the number of spoil sheets, especially after printing interruptions. The task of automatically obtaining the ink layer thickness filling on the applicator rollers, especially during printing interruptions, is achieved by the roller setting device for connecting and disconnecting the intermediate rollers and the inking roller to the inking cylinders, starting from a applicator roller stopping cam via a six-link planar coupling gear and a four-member planar coupling gear, which are associated with stops, which are the roll legs of the inking roller and the intermediate rollers can be assigned, is connected to a doctor shaft. Fig. 2

Description

VEB Combined Polygraph

"Werner Lamberz" Leipzig

7050 Leipzig, Leipzig, 13.12.1983

On and off device for inking rollers in printing presses

Field of use ./ .

The invention relates to an arrival and Abstellvorrichtung for inking rollers in printing machines, especially for inking in BogenrotationsOffsetdruckmaschinen.

Characteristic of the known technical solutions

By DD-PS 12464-3 an adjustment for intermediate and inking rollers on printing machines has become known in which by a meaningful ink roller combination an adaptation to different print jobs is possible and color variations on the print carrier at the beginning of printing and interruptions should be avoided or compensated as quickly as possible. By not affecting each other

Flowing four-bar linkage can be realized several ink roller combinations according to print job. The first four-bar linkage is connected, starting from the application Walzenabstellkurve with the dye or strand divider roller, which automatically shut off the four applicator rollers and the strand divider roller at print interruption, so that no fresh ink supply to the rollers following the strand divider roller of the inking unit. Since the rollers of the inking unit continue to rotate during printing interruption, a color layer thickness compensation takes place in this group of rollers. However, every printing expert is anxious to create a Farbschiohtdifferenzgefälle in Plattenzylinderdrehriehtung on the applicator rollers already by the construction of the inking, which has a very favorable effect on the visual impression of the printed product, with the ever-increasing quality requirements of the Druokprodukt a quality only on existing Farbschiohtdickenfall on the applicator rollers can be reached. By the second four-bar linkage, which is connected to a hand lever, the printer has the manual possibility to pivot the intermediate rollers so that the applicator group is divided into three color strands · In a six-color machine, the printer would have to print at six printing units run and the Move lever, wherein at least in the last three to four printing units already a Farbschichtdiokenausgleich took place and would be printed at the beginning of printing waste sheets.

Object of the invention

The object of the invention is to provide an on and off device for inking rollers in printing machines to increase the ease of use and print quality with reduction of the number of spoil sheets especially after print interruptions «

Object of the invention

The object of the invention is to provide an on and off device for inking rollers in printing machines, whereby the existing on the applicator rollers Färbschichtdickenfall is automatically maintained even with pressure interruptions.

Essence of the invention

Invention ^ according to the object is achieved in that the roller adjusting device for arrival and Abposition of the intermediate rolls and the inking roller to the inking cylinder, starting from a Auftragwalzenabstellkurve via a six-member planar coupling gear, a loop and a four-member planar coupling gear, which attacks are assigned, the the roller legs of the ink roller and the intermediate rollers are subordinate, is connected to a doctor shaft.

In a particularly advantageous manner, it is achieved that the position of the gearbox co-ordinates intended for lifting the rollers can be changed by the rotary movement of the hook shaft so that, if necessary, the stops arranged for the purpose of roller separation pass or do not cover the required gearshift paths.

embodiment

The invention will be explained in more detail with reference to an embodiment.

1 shows a schematic representation of an inking unit. FIG. 2 shows a schematic representation of the roller adjusting device according to the invention.

The inking unit according to Fig _e 1 consists essentially of a dye box 1 with the printing ink therein, a 'ductor 2 between the and the subsequent Färbzuführwalzen 4 a color lifter 3 is arranged. The dye supply rollers 4 is a color or strand divider roller 5 naohordnet arranged, via a first distribution cylinder 6 and two application rollers 7; 7 ¹ with a plate cylinder 8 is in contact. About intermediate rollers 9r 9 * is the first distribution cylinder 6 with a second and third distribution cylinder 10; 11 and the applicator rollers 7 ", 7 ^MI connected to the plate cylinder 8.

According to Fig. 2, a drive lever 13 is connected to a Auftragwalzenabstellkurve not shown in accordance with DD-PS 124643, as well as the application rollers 7 to 7 ^flt · A switching coupling 14 · is rotatably attached to the drive lever 13 and the Auftrwalwalzenabstellkurve * The joint of Switching coupling 14 is connected to a straight guide a loop 19 which is rotatably mounted in the machine frame and has a first stop 16 in conjunction · Also in the linear guide of the loop 19 is a cranked lever 16 is fixed, which has a second stop 17 and on a coupling 21 is rotatably mounted and a Abstellkoppel 26 with a driven lever 25 which has a third stop 18 and is also rotatably mounted on the coupling 21 is connected.

The gear members 13, 14, 15, 25 and 26 form a six-membered planar coupling gear.

A drive member 20 is fixedly connected to a doctor shaft 23 carrying a wash blade 24. The doctor shaft 23 is movably disposed in the positions I to IV. About the coupling 21 of the drive lever 20 is rotatably connected to a rocker mounted in the machine frame 22.

These gear members 20, 21 and 22 form a four-membered, planar coupling gear.

The stops 16 to 18 are in employed application rollers 7 to 7 ¹ - ¹¹ not directly to the roll legs of the rollers 9; 9 * and 5 on. /

The operation of the device is the following? By the rotational movement of the ductor 2 in the counterclockwise direction, a color profile of defined thickness is transferred to the surface thereof. This color profile is transferred from the reciprocating color lifter 3 to the ink feed rollers 4, which uniform the ink and rub it into a thin ink film. "Due to the arrangement of the following rollers, the applicator rollers become ? and 7 * added more color than the underlying in Plattenzylinderdrehrichtung so that a Farbschichtdickenfall arises. These different, very important for a quality printing ink layer thicknesses are transferred to a spanned on the plate cylinder 8, not shown, printing plate.

By the movement of the drive member 20 four switching variants of the roller adjusting device 12 can be realized for different purposes of the inking unit. In principle, two operating states are of relevance. Once job rolls 7 to 7V '' employed, what the printer with "print on" and Auftragwalsen 7 to 7 ^ftl turned off, which the printer with "print off" called. .

Position of the doctor blade © 23?

I) washing ink roller 5 and intermediate rollers 9 »9 * at

"Pressure on" and "pressure off" employed. Wash blade 24 is applied to the third distribution cylinder 11.

II infeed ink roller 5 and intermediate rollers 9; 9 * at

"Pressure on" and pressure off "employed" Washer 24 off the third distribution cylinder.

III automatic? Ink roller 5: and intermediate rollers 9 $ 9 * at

"Pressure on" turned on and off "pressure off".

Automatic for

intermediate rolls

9s 9 * s intermediate rollers 9; 9 * separated.

Ink roller 5 employed at "Druök an" and separated at "pressure off".

When printing interruptions according to DD-PS 124643 Aiiftragwalzenabstellkurve is automatically pivoted, whereby the application rollers 7 are lifted 7, 7 ^ffl from the plate cylinder 8 · With the .Auftragwalzenabstellkurve the drive lever 13 is rotated to the dashed position, whereby the ink roller 5 and the intermediate rollers ; ^9f through the six-link coupling gear 13? 14 $ 15; 25 »26 and the loop 19 raised over the stops 16 to 18 or · around the distribution cylinder 10; 11 are pivoted at the contact points A, collar C. However, this pivoting is only realized when the doctor shaft 23 has been brought into the automatic position III, position III of the doctor shaft 23 is the Yorzugsschaltvariante, since this switching position is best suited for the printing process.

For this reason, the stops 16 to 18 are not directly on the Waläenschenkeln, but are subject to play to only in a certain position of the four-link linkage 20; 21; 22 a lifting of the rollers 9; 9 * and 5 to realize.

Thus, when pressure is interrupted and position III of the doctor shaft 23 three groups of rollers 9 *; 11; 7 ^{1 M} »9 * 10; 7 "and 6; 7i 7 *, whereby the ink layer thickness difference on the applicator rollers 7 to 7 * ^{tf is} almost maintained. Compensation within the applicator roller group can no longer take place, thereby reducing the number of initial waste sheets when the printing operation is continued.

Claims (1)

trf »r trt rf * * f> ft invention claim Au and storage device for inking rollers in'Print machines, wherein the applicator rollers Farbreibzylinder and these intermediate rollers and a paint roller are arranged downstream and the applicator rollers, the ¹ intermediate rollers and the ink roller is associated with a roll adjusting device, characterized in that the roller adjusting device (12) for arrival and Placing the intermediate rolls (9, 9 ') and the inking roller (5) on the inking cylinders (6; 10; 11), starting from a Auftragwalzenabstellkurve üs a six-member planar coupling gear (Ί3 j 14- {15; 25; 26), a loop (19) and a four-member planar coupling gear (20; 21; 22), which stops (16; 17i 18) are associated with the roll legs of the ink roller (5) and the incidents (9; 9 ») are assignable, with a Squeegee shaft (23) ν ignition is · ν / ' For this. ..Z. .Sides