DE19936144A1 - Fluid applicator device for cylinders or rollers of printing machines has nozzle bar with spaced spray nozzles each assigned a mixer chamber having two or more non-return valves for suplying different fluids - Google Patents

Abstract

The device has a nozzle bar with spaced spray nozzles (7) each associated with a spring-tensioned non-return valve (8, 9) connected to a fluid-transporting pressure line. Each spray nozzle is assigned a mixer chamber (10) which has at least two non-return valves opening towards same. The pressure lines (11, 12) can convey different fluids. A first non-return valve is connected to a first pressure line and a second such valve to the second pressure line. The pressure lines can be selectively biased in succession or simultaneously.

Description

The invention relates to a device for applying liquid to the cylinder or whale zen 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 with spaced apart spray nozzles, each of which has a spring-loaded back check valve is assigned, which in conjunction with a liquid-carrying pressure line dung, which is supplied with liquid by a dosing pump.

Such a device is known from DE 43 18 647 A1. Since it is used in printing presses Cleaning of cylinders or rollers is required, alternating between water, Lö Applying agents and / or mixtures thereof must have a ge for each medium separate arrangement of spray nozzles / check valves may be provided, which is a high on due to wall. It is also detrimental to the cleaning result that the Spray positions for the different liquids are different and when ver When mixtures are used, they separate during the supply to the spray nozzles can.

The object of the invention is to establish a device according to the preamble of claim 1 to develop that with a spray nozzle either different liquids or Mi can be applied.

According to the invention the object is achieved by the features of claim 1.

With the solution according to the invention it is possible to choose different liquids or to apply a mixture thereof to cylinders, rollers or cleaning agents, wherein the device according to the invention can be implemented with little effort. Moreover the spray positions of the different liquids are the same and a separation of Mixing is impossible because the liquids are just in front of the spray nozzles be performed.

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

Fig. 1 is a side view of a nozzle beam in sectional view,

FIG. 2 shows a section along the line AA in FIG. 1.

In Fig. 1, a nozzle bar 1 is shown as part of a known cleaning device 2 according to the type of cloth. Only a cloth 3 and a base body 4 of the cleaning device 2 are shown. The cleaning device 2 and thus the nozzle bar 1 extend over the entire working width of the printing press and thus also over the width of a cylinder 5 to be cleaned. The nozzle bar 1 consists of a Trägerele element 6 , in which spray nozzles 7 are arranged at a distance from one another ( FIG. 2).

Each spray nozzle 7 are assigned at least a first check valve 8 and a second check valve 9 . The check valves 8 , 9 are pushed into a closed position by a compression spring 13 . The spray nozzle 7 and the check valves 8 , 9 are arranged in the support element 6 to one another such that an outlet opening 8.1 of the first check valve 8 , a second outlet opening 9.1 of the second check valve 9 and an inlet opening 7.1 of the spray nozzle 7 protrude into a mixing chamber 10 .

In the exemplary embodiment, the nozzle bar 1 is fixed in the base body 4 of the cleaning device 2 such that the first check valves 8 are connected to a first pressure line 11 provided in the base body 4 and the second check valves 9 are connected to a second pressure line 12 seen in the base body 4 . The pressure lines 11 , 12 are each with a liquid, so z. B. the first pressure line 11 filled with water and the second pressure line 12 with a solvent. The pressure lines 11 , 12 are connected to metering pumps known per se and not shown.

If water is to be applied to the cylinder 5 , a predetermined amount of water is conveyed into the first pressure line 11 by the metering pump, thereby opening the first check valves 8 against the action of the compression springs 13 and leading the water through the mixing chamber 10 to the spray nozzles 7 which generate a spray 14 directed towards the cloth 3 . The cloth 3 is moistened by the spray jets 14 of the spray nozzles 7 , subsequently brought into contact with the cylinder 5 by known means and so this is moistened with water. If a solvent is to be applied to the cylinder 5 , the second pressure line 12 is supplied with solvent, which is fed via the second check valves 9 and the mixing chambers 10 to the spray nozzles 7 and sprayed onto the cloth 3 by them. The cloth 3 moistened with the solvent is brought into contact with the cylinder 5 and so this is wetted with solvent. If it is desired to apply a mixture of water and a solvent to the cloth 3 and transfer it from this to the cylinder 5 , the first pressure line 11 is simultaneously pressurized with water and the second pressure line 12 with solvent and thus via the first check valve 8 water and via the second check valve 9 solvent in the mixing chamber 10 is introduced, mixed in the mixing chamber 10 and then What water / solvent mixture is sprayed through the spray nozzles 7 of this on the cloth. 3 The cloth 3 is brought into contact with the cylinder 5 and thus the cylinder 5 is moistened with the mixture.

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

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

List of the reference symbols used

1

Nozzle bar

2nd

Cleaning device

3rd

cloth

4th

Basic body

5

cylinder

6

Carrier element

7

Spray nozzle

7.1

Entrance opening

8th

first check valve

8.1

Outlet opening

9

second check valve

9.1

Outlet opening

10th

Mixing chamber

11

first pressure line

12th

second pressure line

13

Compression spring

14

Spray jet

Claims (7)

1. Device for applying liquid to cylinders or rollers of a printing machine or to cleaning agents such as a cleaning cloth or a brush roller for cleaning the cylinders, consisting of a nozzle bar with spray nozzles arranged at a distance from one another, each of which is assigned a spring-loaded check valve, which is connected to a liquid-carrying pressure line which is supplied with liquid by a metering pump, characterized in that each spray nozzle ( 7 ) is assigned a mixing chamber ( 10 ) which has at least two non-return valves opening towards the mixing chamber ( 10 ) ( 8 , 9 ) is provided. 2. Device according to claim 1, characterized in that a first check valve ( 8 ) and a second check valve ( 9 ) are provided and the first check valve ( 8 ) with a first pressure line ( 11 ) and the second check valve ( 9 ) with egg ner second pressure line ( 12 ) is connected. 3. Device according to claim 1 and 2, characterized in that the pressure lines ( 11 , 12 ) carry different liquids. 4. Device according to claim 1 and 2, characterized in that each pressure line ( 11 , 12 ) is assigned a metering pump. 5. Device according to claim 1 to 3, characterized in that optionally a supply of pressure lines ( 11 , 12 ) takes place in succession. 6. Device according to claim 1 to 3, characterized in that the pressure lines ( 11 , 12 ) are applied simultaneously. 7. Device according to claim 1 to 3, characterized in that an optional loading of the pressure lines ( 11 , 12 ) takes place successively and / or simultaneously.