DE19936144B4 - Device for applying liquid - Google Patents

Abstract

The invention relates to a device for applying liquid to cylinders or rollers of a printing press or to cleaning agents such as a cleaning cloth or a brush roller for cleaning the cylinder, consisting of a nozzle bar with spaced-apart spray nozzles, each associated with a spring-loaded check valve, which communicating with a liquid leading pressure line, which is acted upon by a metering pump with liquid. DOLLAR A object of the invention is to develop a device according to the preamble of claim 1 so that optionally with a spray nozzle different liquids or mixtures thereof can be applied. DOLLAR A According to the invention the object is achieved in that each spray nozzle (7) is assigned a mixing chamber (10) which is provided with at least two check valves (8, 9) opening towards the mixing chamber (10).

Description

The The invention relates to a device for applying liquid on cylinders or rollers of a printing press or on cleaning agents such as a cleaning cloth or a brush roller for cleaning the cylinder, consisting of a nozzle bar at a distance from each other arranged spray nozzles.

From the DE 43 18 647 A1 Such a device is known. Since it is necessary in printing machines for cleaning cylinders or rollers, alternatively alternately apply water, solvents and / or mixtures thereof, a separate arrangement spray nozzles / check valves must be provided for each medium, which requires a lot of effort. In addition, it is disadvantageous for the result of the cleaning that the spray positions for the different liquids are different and when using mixtures, these can segregate during the supply to the spray nozzles.

From the DE 578937 C a device for the production of mixed colors in the injection pressure is known, in which a spray nozzle is associated with a mixing chamber which is provided with opening to the mixing chamber valves.

In the DE 6751526 U a device for applying of several separately stored components is described, consisting of a housing with connections for the. Supplying the individual components and a propellant to a spray pipe, wherein arranged in each supply line a valve to be operated separately and additionally provided in the housing a valve for the shut-off of the supply lines for all components simultaneously.

task The invention is a device according to the preamble of the claim 1 so that with a spray nozzle optionally different liquids or mixtures thereof can be applied.

According to the invention Problem solved by the features of claim 1.

With the solution according to the invention it is possible optionally different liquids or to apply a mixture thereof to cylinders, rollers or cleaning agents, wherein the inventive device can be realized with little effort. Besides, they are the spray positions of different liquids equal and a segregation of mixtures is excluded, since the liquids be fed immediately before the spray nozzles.

The Invention will be explained in more detail below using an exemplary embodiment. In the drawings show

1 the side view of a nozzle beam in sectional view,

2 a section along the line AA in 1 ,

In 1 is a nozzle bar 1 as part of a known cleaning device 2 represented by the type of cloth. From the cleaning device 2 are just a cloth 3 and a basic body 4 shown. The cleaning device 2 and thus the nozzle bar 1 extend over the entire working width of the printing press and so across the width of a cylinder to be cleaned 5 , The nozzle bar 1 consists of a carrier element 6 in which spray nozzles are arranged next to each other at a distance 7 are arranged ( 2 ).

Every spray nozzle 7 are at least a first check valve 8th and a second check valve 9 assigned. The check valves 8th . 9 be by a compression spring 13 pushed into a closed position. The spray nozzle 7 and the check valves 8th . 9 are so in the carrier element 6 arranged to each other, that an outlet opening 8.1 of the first check valve 8th , a second outlet 9.1 of the second check valve 9 and an entrance opening 7.1 the spray nozzle 7 in a mixing chamber 10 protrude.

The nozzle bar 1 is in the embodiment in the main body 4 the cleaning device 2 fixed so that the first check valves 8th with one in the main body 4 provided first pressure line 11 and the second check valves 9 with one in the main body 4 provided second pressure line 12 are connected. The pressure lines 11 . 12 are each with a liquid, such as is the first pressure line 11 with water and the second pressure line 12 filled with a solvent. The pressure lines 11 . 12 are connected with known and not shown metering pumps in combination.

Target on the cylinder 5 Water are applied, by the metering pump a predetermined amount of water in the first pressure line 11 promoted, thereby the first check valves 8th against the action of the compression springs 13 opened and the water through the mixing chamber 10 to the spray nozzles 7 led, one on the cloth 3 directed spray 14 produce. The cloth 3 gets through the spray jets 14 the spray nozzles 7 moistened, subsequently by known means in contact with the cylinder 5 and so moistened with water. Target on the cylinder 5 a solvent is applied, the second pressure line 12 Solvent supplied via the second check valves 9 and the mixing chambers 10 to the spray nozzles 7 promoted and of these on the cloth 3 is sprayed. The cloth moistened with solvent 3 gets in contact with the cylinder 5 brought and so wetted with solvent. It is desirable to apply a mixture of water and a solvent on the cloth 3 to apply and from this to the cylinder 5 at the same time become the first pressure line 11 with water and the second pressure line 12 treated with solvent and so on the first check valve 8th Water and over the second check valve 9 Solvent in the mixing chamber 10 introduced, in the mixing chamber 10 mixed and then this water / solvent mixture through the spray nozzles 7 on the cloth 3 sprayed. The cloth 3 gets in contact with the cylinder 5 brought and thus the cylinder 5 moistened with the mixture.

Of course it is also possible the nozzle bar 1 as a separate functional unit and this form a cylinder 5 to assign directly and so to spray this optionally with water, solvent and / or a corresponding mixture, wherein instead of the cylinder 5 a roller or a compactor can be provided.

The mixing chambers 10 can also be assigned to another check valve and so another liquid the spray nozzles 7 separately or as a mixture with the over the first check valve 8th and the second check valve 9 introduced components and fed to a cylinder 5 or applied to a cleaning agent.

1

nozzle beam

2

cleaning device

3

cloth

4

body

5

cylinder

6

support element

7

spray nozzle

7.1

inlet opening

8th

first check valve

8.1

outlet opening

9

second check valve

9.1

outlet opening

10

mixing chamber

11

first pressure line

12

second pressure line

13

compression spring

14

spray

Claims (5)

Device for applying liquid to cylinders or rollers of a printing press or to cleaning agents, such as a cleaning cloth or a brush roller for cleaning the cylinders, consisting of a nozzle bar (US Pat. 1 ) with spaced spray nozzles ( 7 ), each spray nozzle ( 7 ) a mixing chamber ( 10 ) associated with a first and second respectively to the mixing chamber ( 10 ) opening spring-loaded check valve ( 8th . 9 ), wherein the first check valve ( 8th ) with a first pressure line ( 11 ) as well as the second check valve ( 9 ) with a second pressure line ( 12 ) connected is Device according to claim 1, characterized in that the pressure lines ( 11 . 12 ) lead different liquids. Device according to claim 1, characterized in that each pressure line ( 11 . 12 ) is associated with a metering pump. Device according to Claims 1 to 2, characterized in that optionally an admission of the pressure lines ( 11 . 12 ) takes place successively. Device according to claim 1 to 2, characterized in that an admission of the pressure lines ( 11 . 12 ) takes place simultaneously.