Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
  • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
  • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
  • B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
  • B05B7/2497—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device several liquids from different sources being supplied to the discharge device
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
  • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
  • B05B7/28—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid
  • B05B7/32—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid the fed liquid or other fluent material being under pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F35/00—Cleaning arrangements or devices
  • B41F35/06—Cleaning arrangements or devices for offset cylinders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2235/00—Cleaning
  • B41P2235/10—Cleaning characterised by the methods or devices
  • B41P2235/20—Wiping devices
  • B41P2235/23—Brushes

Definitions

• the invention relates to a rubber blanket washing device with a wash cloth that can be positioned on the rubber blanket and can be conveyed step by step, and which can be moistened by means of a nozzle bar which can be supplied with washing liquid by at least one pump.
• the nozzle bar is supplied with washing liquid by a high-pressure pump in such a way that it is always present at the spray nozzles and flows out via the pump during operation.
• a high-pressure pump in such a way that it is always present at the spray nozzles and flows out via the pump during operation.
• there is always an amount of liquid corresponding to its capacity in the nozzle bar which must be removed each time the nozzle bar is removed, which makes this process extremely cumbersome and also means a loss of washing liquid. tet.
• an exact dosage of the amount of liquid dispensed by the spray nozzles is practically impossible to achieve in arrangements of this type.
• This object is achieved according to the invention in a surprisingly simple manner in that a precisely predeterminable dose of washing liquid can be introduced into the nozzle bar at least once during each work cycle and that the nozzle bar can be connected to a compressed air source for blowing out the received washing liquid dose after such an exposure.
• a washing liquid composed of several, sometimes very aggressive, components.
• this can be achieved in a simple manner in that a pump is provided for each component, which is preferably connected via a liquid line secured by a non-return valve to a common supply nozzle of the nozzle bar, to which a via a Check valve secured compressed air line is connected.
• a pump is provided for each component, which is preferably connected via a liquid line secured by a non-return valve to a common supply nozzle of the nozzle bar, to which a via a Check valve secured compressed air line is connected.
• washing liquid pump or pumps is designed as a piston pump with an adjustable stroke. This enables a precisely defined funding volume to be achieved with the possibility of adapting to needs,
• Figure 1 is an overall view of a blanket washing device, partly in section and
• Figure 2 is a block diagram of a particularly preferred embodiment of the invention for an arrangement working with a two-component washing liquid.
• the rubber cylinder of an offset printing press is indicated at 1, of a design known per se, to which a washing device, designated as a whole by 2, is assigned.
• This has a frame which is delimited by lateral end shields 3 and is pivotably suspended in the printing machine frame.
• the washing device 2 works with a washing cloth 4, which can be gradually wound up from a storage drum 5 and onto a take-up drum 6.
• the washing cloth 4 is guided over a pressure roller 7, which is opposite the rubber cylinder 1 and is designed here as a brush roller by pivoting the frame delimited by the end shields 3 against the rubber cylinder 1, approximately approximately diametrically opposite the contact zone 8, the brush roller 7 rests against a trough-shaped support plate 9.
• a nozzle bar 11 is provided with spray nozzles 10, which is expediently arranged within the space delimited by the washcloth 4 and is thus practically encapsulated by the washcloth 4 itself, which provides excellent protection of the neighboring machine parts against moistening by the Spray nozzles 10 offers. At the same time, this ensures that the washcloth 4 can be simply inserted in the form of an envelope when changing the washcloth.
• guide cross members 12 and 13 are provided here, which can be connected to the side bearing plates 2 to form a stable frame.
• the guide crossmember 12 also serves as a receptacle for the nozzle bar 11 and as a receptacle for any washing liquid that may drip off.
• the nozzle bar 11 is provided with a supply connection 14 which, as in the exemplary embodiment shown, can be branched over its entire width in order to ensure uniform application to the nozzle bar.
• a compressed air line 15 connected to a compressed air source and at least one, in the exemplary embodiment shown, two liquid lines which can be acted upon by an associated pump 16 each open into the supply connection 14 17 a.
• Each strand 17 is assigned to a specific washing liquid component.
• the pumps 16 are expediently designed as piston pumps in order to achieve precise metering of the washing liquid supplied to the nozzle bar 11.
• these are so-called suction and pressure pumps, each of which is connected to the assigned water tank 19 or the assigned detergent additive tank 20 with a suitable suction line 18.
• the check valves of the pumps are indicated at 21.
• the compressed air line 15 is here simply with one through the.
• Ring line 22 indicated compressed air network connected.
• the compressed air line 15 and the liquid lines 17 are each secured by a check valve 23, so that any contamination is avoided.
• the supply nozzle 14 and the nozzle bar 11 provided therewith have a certain capacity for washing liquid, for example in the form of the collecting space 24 indicated here in dashed lines, to which all the spray nozzles are connected.
• a predetermined amount of liquid is now introduced into the nozzle bar 11 as a function of the gradual further transport of the washcloth 4 by corresponding actuation of the pumps 16.
• the pumps 16 are each to perform one stroke for this purpose.
• the stroke size of the pumps 16 is expediently adjustable, which precisely adjusts the pump stroke to the respective fluid requirements. So that no liquid can escape through the spray nozzles 10 when the nozzle bar 11 is acted upon, the maximum joint stroke volume of all pumps 16 should be below the capacity of the nozzle bar 11 and of the supply nozzle 14 reaching as far as the check valves.
• the compressed air line 15 is now activated and the reservoir formed by the capacity of the nozzle bar and the supply nozzle connected to it is emptied by the inflowing compressed air.
• a valve 25 is provided in the compressed air line 15, which is controlled by means of a control device (not shown here) in such a way that the compressed air line 15 is activated as soon as the pumps 16 have ended their stroke.
• the pumps 16 are pneumatically actuated, control slides 27 being provided in the drive line 26 leading to the ring line 22, which are controlled via the control device (not shown here) in such a way that the pumps 16 and thus the liquid strands 17 run counter to the compressed air line 15 activated or passivated.
• One spray cycle of the type described above is normally sufficient per wash cloth step. If more washing liquid is required, two or more spray cycles can also be provided per step.
• the nozzle bar 11 can only be pressurized with compressed air.
• the pumps 16 are simply shut down and the valve 25 is held in the open position by a suitable control pulse.

Landscapes

• Inking, Control Or Cleaning Of Printing Machines (AREA)
• Treatment Of Fiber Materials (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8164802

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (2)

Family Cites Families (2)

• 1979
  • 1979-09-25 JP JP54501604A patent/JPH0233306B2/ja not_active Expired - Lifetime
  • 1979-09-25 WO PCT/EP1979/000074 patent/WO1981000828A1/de unknown

Patent Citations (2)

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