EP4321260A1 - Installation de peinture et procédé de peinture d'un objet de peinture - Google Patents

Installation de peinture et procédé de peinture d'un objet de peinture Download PDF

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Publication number
EP4321260A1
EP4321260A1 EP23190561.3A EP23190561A EP4321260A1 EP 4321260 A1 EP4321260 A1 EP 4321260A1 EP 23190561 A EP23190561 A EP 23190561A EP 4321260 A1 EP4321260 A1 EP 4321260A1
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EP
European Patent Office
Prior art keywords
painting
liquid medium
cabin
painted
painted object
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23190561.3A
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German (de)
English (en)
Inventor
Tiemo Sehon
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Individual
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Individual
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Publication date
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Publication of EP4321260A1 publication Critical patent/EP4321260A1/fr
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/60—Ventilation arrangements specially adapted therefor
    • 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
    • B05B7/0075—Nozzle arrangements in gas streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/107—Post-treatment of applied coatings
    • B05D3/108—Curing

Definitions

  • the invention relates to a painting system according to the preamble of claim 1.
  • the invention also relates to a method for painting a painted object according to the preamble of the independent claim.
  • Paint systems and methods for painting a painted object are known from the prior art. E.g. revealed DE 199 37 193 A1 a painting booth and a method for drying water-based base coat applied to an object in a painting booth. There, fans are used inside the paint booth Cabin air accelerates, which is used to act on the object. This intensifies the drying of the applied paint and reduces the required drying time. This allows painting work to be optimized.
  • the electrostatic charge that occurs in painting systems proves to be difficult, as it leads to dust and particles contaminating the object to be painted. There is a risk that the painting result will be inferior.
  • the invention is based on the object of improving the painting results on objects to be painted in a structurally simple and energy-efficient manner.
  • the invention solves this problem by a painting system with the features of claim 1.
  • the painting system has a cabin and at least one flow generator.
  • the cabin has one Recording area for recording a painted object.
  • the at least one flow generator is set up and/or intended to generate an air flow that can be aligned or aligned with the receiving area.
  • the painting system has a humidification device for feeding and atomizing a liquid medium into the air flow generated by the flow generator.
  • the humidification device is fluidly connected via a fluid line to a fluid source for providing the liquid medium.
  • a controllable, in particular openable, switching valve is arranged in the fluid line, so that when the switching valve is (at least partially) open (and the flow generator is switched on), the liquid medium is fed into the air flow and the receiving area with the air flow contains the atomized liquid medium (aerosol). is humidified (humidification operating state).
  • the painted object located in the receiving area can not only be subjected to an air flow, but the air flow can be fed with a liquid medium if necessary (opening the switching valve), so that the painted object is exposed to an accelerated and humidified air mass flow (aerosol).
  • a liquid medium if necessary (opening the switching valve)
  • an accelerated and humidified air mass flow aserosol.
  • the painting system is used for painting and/or post-treatment of painted objects (painted or yet to be painted object).
  • the receiving area (three-dimensional space) is in particular dimensioned such that it can preferably completely accommodate the painted object.
  • the painted object can generally be an object, for example a workpiece, or a vehicle such as a car, truck, bus, motorcycle and/or the like.
  • the cabin has a cabin space (interior of the cabin), which is delimited by a cabin floor, a cabin ceiling and cabin walls.
  • the cabin ceiling can be designed as a filter ceiling (ceiling acts as an air filter).
  • a cabin door can be formed in one of the cabin walls.
  • a door can be formed in the same or another cabin wall.
  • a ventilation room connected to a ventilation device, to which heated air is supplied via a supply air duct, which flows out into the cabin room through a filtered form via the cabin ceiling.
  • a ventilation device to which heated air is supplied via a supply air duct
  • a flow generator for example a fan
  • a fan can be arranged for supplying air into the ventilation space.
  • the air that flows into the cabin space can flow out again via the cabin floor and be fed to an exhaust air duct.
  • the booth can be a (pure) painting booth (painting system), a combined painting and drying booth (combined painting and drying system), a drying booth or a post-reaction booth (painting system with a connected booth for drying and/or post-reaction).
  • Fresh air from the environment can be supplied to the cabin space via the supply air duct. Exhaust air from the cabin space can be released into the environment via the exhaust air duct.
  • the supply air duct and the exhaust air duct can be connected to one another by a switching flap, for example for dryer operation with recirculated air.
  • the changeover flap and the connection of the supply air duct and exhaust air duct can be designed as in DE 199 12 361 A1 described.
  • the painting system is in particular set up in such a way that it can be switched into a painting operation, a dryer operation, a recirculation operation and/or into a rest state (painting system not in operation).
  • the controllable switching valve is in particular set up in such a way that it can be opened by control.
  • the switching valve is preferably designed to be controllable so that the delivery quantity of the liquid medium can be metered.
  • the humidification device can have one or more atomization nozzles, by means of which the liquid medium supplied via the fluid line can be atomized.
  • the switching valve can be arranged as close as possible to the atomization nozzle(s). This means that a dead volume of liquid medium between the switching valve and atomization nozzles can be kept as low as possible. This reduces the risk of unwanted drip formation.
  • one or more (sub) switching valves are provided, which are connected in the fluid line upstream of one or more atomization nozzles, preferably directly.
  • several nozzles can specifically actuate or open those nozzles that are required to moisten the recording area or one or more sections of the recording area. This promotes targeted and precise dosing of the liquid medium.
  • the humidification device is preferably set up in such a way that the liquid medium in the fluid line is pressurized. This favors one quick and as fine as possible atomization of the liquid medium. Regardless of this, the humidification device is preferably set up in such a way that a relative humidity of at least 50% can be achieved in the recording area. For example, when the painting system is operating with air recirculation, at least 50% relative humidity can be achieved after 10 minutes of operation.
  • the humidification device differs from a coating or painting device (e.g. a paint gun), by means of which the paint can be applied to the painted object (actual painting process).
  • the humidification device is a separate device from a coating or painting device.
  • the fluid source that provides the liquid medium to the fluid line can be a water tank or a water connection or house water connection.
  • the (still unprocessed) liquid medium can therefore be conventional water or tap water.
  • the liquid medium can be processed before being fed into the air stream, for example by means of a processing device as described below.
  • the humidification device can be set up in such a way that the delivery quantity of the liquid medium can be adjusted, in particular can be regulated.
  • the switching valve can be set up in such a way that it is designed to be controllable, for example by means of an actuator.
  • the actuator can be coupled to a control and/or operating unit in such a way that the actuator can be controlled and/or regulated by this unit.
  • a signal from a temperature and/or humidity sensor arranged in the cabin space, in particular in the recording space, can enter the control and/or operating unit as an input signal.
  • a processing device for the liquid medium can advantageously be integrated into the fluid line, the processing device having a reverse osmosis system for cleaning the liquid medium.
  • water as a liquid medium can be processed into fully demineralized water (deionized water).
  • the reverse osmosis system can in particular have an osmosis membrane that filters the water according to the principle of reverse osmosis. The water is forced through the osmosis membrane at a defined pressure. Only water molecules can pass through the osmosis membrane.
  • the reverse osmosis system is integrated into the fluid line in such a way that the liquid medium can flow through the reverse osmosis system. Liquid medium that comes from the fluid source and towards flows through the humidification device, passes through the reverse osmosis system.
  • the processing device for the liquid medium can expediently have a frequency generator for exciting the liquid medium.
  • a frequency generator for exciting the liquid medium.
  • liquid medium for example water
  • the frequency generator can be connected upstream or downstream of the reverse osmosis system.
  • the processing device for the liquid medium can have one or more ion exchangers. This can be used to soften or decalcify the liquid medium, for example water, through ion exchange. This reduces impurities in the liquid medium. Because the liquid medium used to moisten the object being painted has greater purity, the painting result can be optimized.
  • the processing device for the liquid medium can expediently have one or more UV disinfection units.
  • sterilization of the liquid medium for example water
  • water as a liquid medium can be processed into fully sterilized water. Disinfection of the liquid medium promotes this Painting result and contributes to a pleasant working atmosphere in the cabin.
  • the processing device can have a storage tank for storing treated liquid medium, for example treated water. This means that a certain volume of prepared liquid medium can be kept in reserve before it is fed to the receiving area through the fluid line for humidification.
  • the processing device can have one or more oxidation devices and/or filtration devices.
  • the processing device can also have a switch box for electrical and/or electronic connection of the components of the processing device.
  • the processing device can have a control device for controlling, regulating and/or monitoring the processing device.
  • the painting system can have a metering device for feeding a, preferably liquid, additive into the liquid medium as required, the metering device having a reservoir for providing the additive, the reservoir being provided by means of a controllable, in particular openable by control, metering valve the fluid line is connected so that the additive is added to the liquid medium when the metering valve is open.
  • the additive can preferably be an antistatic agent. This means that when the receiving space is humidified, any static charge that may be present on the object to be painted can be minimized or eliminated (anti-static). This promotes a high-quality painting result.
  • the antistatic agent is fed in by means of the metering device, in particular only if antistaticization is desired.
  • the metering device can be arranged in the fluid line before, in or after the processing device. An arrangement downstream of the processing device promotes particularly precise dosing of the antistatic agent.
  • the antistatic agent can be a biocide, a disinfectant or a discharge additive, for example catalytic water.
  • the painting system can be set up in such a way that it can be selectively brought into a first moistening operating state and into a second moistening operating state.
  • the additive preferably the antistatic agent
  • the metering valve can be controlled or opened.
  • the receiving area is moistened with the air flow containing the liquid medium (e.g. demineralized water) and the additive, such as the antistatic agent. This can be used to anti-statize before painting.
  • the second humidification operating state no additive or antistatic agent is added to the liquid medium.
  • the metering valve is therefore not activated or remains closed.
  • the recording area is then moistened with the air flow containing only the liquid medium (e.g. demineralised water) without any additive. This can be used to harden the paint, in particular clear coat hardening after clear coat painting.
  • a heating device can expediently be provided, by means of which the cabin air of the cabin can be tempered. This allows the cabin space and in particular the recording area to be brought to the desired temperature.
  • the heating device is in particular set up in such a way that the temperature of the cabin air can be raised to 30° to 40° Celsius in the second humidification operating state. This means that evaporative cooling can be counteracted during paint curing, especially clear coat curing.
  • the heating device can, for example, be arranged in a supply air duct of the painting system, which supplies air to the painting booth, for example via the booth ceiling.
  • the painting system can be set up in such a way that the switching valve for feeding in the liquid medium is or can only be opened after the flow generator has been switched on, preferably where the flow generator was operated with a predetermined lead time before the switching valve was opened.
  • the humidification can thus be activated by switching on the flow generator, operating it for a predetermined lead time (lead time) and then opening the switching valve (humidifying).
  • the painting system can be set up in such a way that the flow generator is or can only be switched off after the switching valve for feeding in the liquid medium has been closed, preferably with the flow generator being operated with a predetermined follow-up time after the switching valve has been closed. This ensures that liquid medium that has already been fed in has been transported into the receiving area by the air flow before the flow generator is switched off. This can prevent unwanted drop formation at the end of humidification.
  • the humidification can therefore be deactivated by closing the switching valve, operating the flow generator for a predetermined run-on time (run-on time) and then switching off the flow generator.
  • the painting system can have a filter ceiling that separates a cabin space (the receiving area is located in this) from a ventilation space (this is arranged above the cabin space in the direction of gravity), the humidification device having one or more atomizer nozzles arranged on the filter ceiling for humidifying the filter ceiling and / or the cabin space.
  • the filter ceiling and the cabin space can be humidified.
  • the painting system has a supply air duct which opens into the ventilation space, with a fan being provided in the supply air duct as a flow generator. This allows supply air to be led into the ventilation room.
  • the atomizer nozzles can be arranged above the filter cover and/or below the filter cover.
  • Atomizer nozzles arranged below the cabin ceiling can be used to directly humidify the cabin space or its receiving area, since the liquid medium is released directly into the cabin space. This allows targeted or selective humidification to occur.
  • Atomizer nozzles arranged above the cabin ceiling can be used to indirectly humidify the cabin space or its receiving area, since the liquid medium is released into the filter ceiling, moistens it and is carried into the cabin space by the air flow (supply air duct). This allows large-area and evenly distributed humidification of the cabin space or its receiving area.
  • the spray nozzles can each be arranged on a spray ring which is fluidly connected to the fluid line and has a plurality of spray nozzles.
  • One or more spray rings can be arranged above the filter ceiling and below the filter ceiling. Humidification on the filter ceiling can cause the Cabin, for example, a drying room (warm cabin air, for example heated by a heating device) or a post-reaction room (cold cabin air) can be realized.
  • the painting system can have one or more fans as flow generators.
  • the humidification device can have one or more atomizer nozzles per fan.
  • the liquid medium can thus be introduced into the air flow generated by the respective blower on one or more blowers.
  • the atomizer nozzles are preferably connected downstream of the fan along the flow direction of the air stream. The blower is therefore not acted upon by the liquid medium, so that the medium fed into the air flow and atomized is not affected by the blower.
  • the fan or fans can each be arranged below the filter ceiling, which separates a cabin space (the receiving area is located in this) from a ventilation space (this is arranged above the cabin space in the direction of gravity).
  • one or more air ducts can be connected downstream of the fan, each air duct having one or more air outlet openings which are aligned or can be aligned with the receiving area. This allows the air flow from the fan to be guided specifically to different locations in the recording area via the air ducts.
  • the air duct provides a flow connection between the fan and the air outlet opening.
  • the air duct can each have one or more nozzle clusters, each with one or more preferably adjustable nozzles that serve to guide the air flow.
  • One atomizer nozzle can be provided per nozzle for dispensing the liquid medium. It is also conceivable that an atomizer nozzle is arranged in every, every second, every third or every fourth air outlet opening.
  • the air ducts can be arranged at least in the upper half of the cabin and in particular extend horizontally, vertically or diagonally. It is also conceivable that the air ducts are arranged throughout the entire space of the cabin and extend in particular horizontally, vertically or diagonally.
  • the fan itself can be arranged in the cabin (cabin space), in the cabin ceiling or outside the cabin and cabin ceiling.
  • the at least one blower can each be designed as a blower unit which is adjustable between a position of use and a position of non-use, in particular can be retracted or pivoted (into the filter cover).
  • the blower unit can be brought into the use position when it is needed and into the non-use position when it is not needed. This means the space required in the cabin can be reduced when not in use.
  • the blower unit can have a fan. In this way, a targeted air flow can be generated, which is, for example, conical, Air jet can be formed.
  • the blower unit sucks in the interior of the cabin, so uses the already existing and temperature-controlled cabin air in an energetically favorable manner.
  • the blower unit When not in use, the blower unit can be pivoted into an opening formed in the filter cover. In the position of use, the blower unit can be swung out of the filter cover or the opening formed in the filter cover. The blower unit can then be arranged largely, preferably predominantly, below the filter ceiling.
  • the blower units can each be arranged in the upper half of the room, in particular in the upper third of the room, of the cabin (below the filter ceiling).
  • One or more blower units can be provided, for example four blower units, with one blower unit being arranged in each corner of the cabin.
  • each blower unit can have a fan that is surrounded by a housing.
  • Each blower unit can also have an electrical line for supplying the electric blower motor, a fluid line for guiding the liquid medium, a compressed gas line for providing excess pressure to the fluid line and/or one or more atomizer nozzles into which the fluid line opens.
  • Two or four blower units can each be designed to be movable along the cabin.
  • the cabin can be delimited by a cabin ceiling, in particular a filter ceiling, with receptacles being formed in the cabin ceiling, into which one of the blower units can be retracted or pivoted in when not in use (non-use position).
  • a cabin ceiling in particular a filter ceiling
  • receptacles being formed in the cabin ceiling, into which one of the blower units can be retracted or pivoted in when not in use (non-use position).
  • the blower unit can be protected from contamination by, for example, being brought into the non-use position during painting or, in other words, being retracted or pivoted into the receptacle.
  • the painting system can have a control and/or operating unit which is equipped with a button (mechanical button, hard key or soft key on a display), the control and/or operating unit being set up in such a way that by pressing the button humidification of the recording area (first humidification operating state and/or second humidification operating state) can be activated and/or deactivated.
  • a button mechanical button, hard key or soft key on a display
  • the control and/or operating unit being set up in such a way that by pressing the button humidification of the recording area (first humidification operating state and/or second humidification operating state) can be activated and/or deactivated.
  • moistening of the recording area can be easily activated or deactivated by pressing a button. This makes operating the painting system easier.
  • the painting system can have a moisture sensor system for measuring the moisture in the receiving area, the moisture sensor system being coupled to the switching valve, in particular via the control and/or Control unit that the delivery amount of liquid medium can be regulated or is regulated depending on the measured moisture in the receiving area.
  • the moisture sensor system therefore influences the amount of liquid medium released.
  • the moisture sensor system can optionally have a temperature sensor for detecting the temperature in the recording area.
  • the moisture sensor system can be coupled to the switching valve or an actuator of the switching valve via the control and/or operating unit.
  • the components moisture sensors, control and/or operating unit and switching valve can form a control circuit.
  • an air flow directed towards the receiving area or the painted object (located therein) is generated. This can be done by switching on a flow generator, for example a fan, which generates the air flow and can initially be operated with a predetermined lead time.
  • a flow generator for example a fan
  • a liquid medium is fed into the air stream and atomized, so that the receiving area or the painted object is moistened with the air stream containing the atomized liquid medium (aerosol) (humidification operating state).
  • a humidification device can be switched on, which feeds the liquid medium into the air flow and atomizes it. Switching on can take place by opening a switching valve, which is arranged in a fluid line which is fluidly connected to a fluid source for providing the liquid medium.
  • the moistening of the receiving area or painted object can be stopped before the painted object is painted with the base coat.
  • This humidification which can be used, for example, to anti-static the object to be painted, takes place in particular immediately before the base coat is painted.
  • the moistening of the receiving area or painted object can be stopped after painting the painted object with the clear coat after the clear coat has completely hardened.
  • This moistening which can be used, for example, to harden the clear coat applied to the painted object, takes place in particular immediately after the clear coat has been painted.
  • an air flow directed towards the receiving area or the painted object can be generated, so that the painted object is exposed to the air flow.
  • the flow generator for example a fan, can be switched on, which generates the air flow.
  • the liquid medium can be fed into the air stream and atomized, so that the painted object is moistened with the air stream containing the atomized liquid medium (aerosol). (re-antistatization), whereby the moistening is stopped before the object to be painted is coated with the clear coat.
  • the liquid medium is preferably only fed into the air stream after a lead time in which the air stream can form has elapsed. This reduces the risk of unwanted droplets forming at the start of humidification.
  • the humidification can be activated in such a way that the flow generator, for example a fan, is switched on, operated for a predetermined lead time and then the liquid medium is fed into the air flow.
  • the generation of the air flow is preferably only ended after a follow-up time has elapsed, in which liquid medium that has already been fed in after the feed has ended can be atomized and transported into the receiving area. This reduces the risk of unwanted drip formation at the end of humidification. Deactivation can take place in such a way that the feed of liquid medium is stopped, the flow generator, for example a fan, is operated for a predetermined run-on period and then the flow generator is switched off.
  • liquid, additive in particular an antistatic agent
  • an antistatic agent can be a biocide, a disinfectant or a discharge additive, for example catalytic water.
  • the liquid medium can be cleaned using a reverse osmosis system before being fed into the air stream. This makes it easy to clean the liquid medium.
  • the liquid water can be processed into fully demineralized water (deionized water).
  • the liquid medium can be prepared by excitation using a frequency generator before being fed into the air stream.
  • a frequency generator allows the water that passes through the frequency generator to be stimulated by the frequency generator. This allows the humidification or atomization process to be optimized.
  • the liquid medium can be softened or decalcified by ion exchange before being fed into the air stream. This frees the liquid medium of hard particles, which has a positive effect on the painting result due to the purer composition of the liquid medium.
  • the liquid medium can be sterilized by exposure to UV radiation before being fed into the air stream.
  • UV disinfection units can be used for this. This has a positive effect on the working atmosphere in the cabin.
  • the humidification can advantageously be carried out in such a way that a relative humidity of at least 50 percent is achieved in the recording area. This means that sufficient air humidity can be achieved for anti-static and/or paint drying.
  • the temperature in the booth in particular a painting booth, can be brought to 30 to 40 ° Celsius.
  • a heating device can be used for heating, which can be arranged, for example, in a supply air duct of the painting system.
  • the object to be painted can be prepared before painting the base coat, preferably before moistening before painting the base coat, for example by sanding, masking and/or cleaning.
  • the booth in particular a painting booth, can be flashed off.
  • FIG. 1 shows a painting system, which is designated overall by the reference number 10.
  • the painting system 10 has a cabin 12, in the example a painting booth 12.
  • the cabin 12 has a cabin space 14, which is delimited by a cabin floor 16, a cabin ceiling 18 and cabin walls 20, 22, 24, 26.
  • the cabin ceiling 18 is in Example designed as a filter blanket 19 and functions as an air filter.
  • a cabin door 23 is formed in the cabin wall 24.
  • a door 25 is formed in the cabin wall 26.
  • a ventilation space 28 to which heated air is supplied via a supply air duct 30, which flows out filtered via the cabin ceiling 18 into the cabin space 14 (cf. Fig.2 ).
  • a heating device 32 for heating the supplied air is arranged in the supply air duct 30.
  • the air that flows into the cabin space 14 can flow out again via the cabin floor 16 and be fed to an exhaust air duct 34 (floor suction).
  • Fresh air from the environment can be supplied via the supply air duct 30. Exhaust air from the cabin space 14 can be released into the environment via the exhaust air duct 34.
  • the supply air duct 30 and the exhaust air duct 34 can be connected to one another by a switching flap 36, for example for dryer operation with recirculated air, as in DE 199 12 361 A1 described.
  • the painting system 10 is set up in such a way that it can be switched into a painting operation, a dryer operation, a recirculation operation and into a rest state (painting system 10 out of operation).
  • the cabin 12 has a receiving area 40 for receiving a painted object 42 (cf. Fig.1 ).
  • the paint shop 10 has four blowers 50 as flow generators 48 in the example, each of which is set up and intended to generate an air flow 52 that can be aligned or aligned with the receiving area 40 (cf. Fig.1 ).
  • the painting system has a humidification device 54 for feeding and atomizing a liquid medium 56 into the air stream 52 generated by the respective blower 50 (cf. Fig.2 ).
  • the humidification device 54 is fluidly connected via a fluid line 58 to a fluid source 60 for providing the liquid medium 56.
  • the fluid source 60 is a domestic water connection.
  • a controllable switching valve 62 is arranged in the fluid line 58, so that when the switching valve 62 is open and the fan 50 is switched on, the liquid medium 56 is fed into the air stream 52 and the receiving area 40 is moistened with the air stream 52 containing the atomized liquid medium 56 (aerosol) ( humidification operating state).
  • the humidification device 54 in the example has several atomizer nozzles 64, 65, by means of which the liquid medium 56 supplied via the fluid line 58 can be atomized (cf . Fig.1 ).
  • the humidification device 54 is set up in such a way that the liquid medium 56 is in the Fluid line 58 is pressurized.
  • a compressed gas line 66 is provided, which opens into the fluid line 58, so that the liquid medium 56 in the fluid line 58 is pressurized.
  • the compressed gas line 66 is connected to a compressed gas source (not shown).
  • a processing device 67 for the liquid medium 56 is integrated into the fluid line 58 (cf. Fig.2 and 3 ).
  • the processing device 67 has a reverse osmosis system 68 for cleaning or desalination of the liquid medium 56.
  • the fluid line 58 is passed through the reverse osmosis system 68. This allows the liquid medium 56, water in the example, to be processed into demineralized water (deionized water), as described above.
  • the processing device 67 also has a frequency generator 69 for exciting the liquid medium 56, through which the fluid line 58 is passed. As a result, liquid medium 56, which passes through the frequency generator 69, can be excited by the frequency generator 69.
  • the processing device 67 has an ion exchanger 70 for softening or decalcifying the liquid medium 56.
  • the fluid line 58 is passed through the ion exchanger 70. This allows the liquid medium 56, in the example water, to be processed into fully decalcified water, as described above.
  • the processing device 67 has a UV disinfection unit 71, through which the fluid line 56 is passed. This allows the liquid medium 56 to be sterilized.
  • the painting system 10 has a metering device 72 for feeding an additive, in the example a liquid antistatic agent 73, into the liquid medium 56.
  • the metering device 72 has a reservoir 74 for providing the antistatic agent 73, the reservoir 74 being connected to the fluid line 58 by means of a controllable metering valve 76, so that the antistatic agent 73 is added to the liquid medium 56 when the metering valve 76 is open.
  • the metering device 72 is connected downstream of the processing device 67 in the fluid line 56.
  • the painting system 10 is set up in such a way that it can be selectively brought into a first humidification operating state and into a second humidification operating state.
  • the first humidification operating state the antistatic agent is added to the liquid medium 56.
  • the metering valve 76 can be controlled or opened.
  • the receiving area 40 is moistened with the air stream 52 containing the liquid medium 56 and the antistatic agent.
  • the second humidification operating state no antistatic agent is added to the liquid medium 56.
  • the metering valve 76 is not activated or remains closed.
  • the recording area 40 is then with the Air flow 52 containing only the liquid medium 56 is humidified without antistatic agents.
  • the painting system 10 is set up in such a way that the switching valve 62 for feeding in the liquid medium 56 is or can only be opened after the blower 50 has been switched on, the blower 50 being operated with a defined lead time before the switching valve 62 is opened.
  • the painting system 10 is also set up in such a way that the blower 50 is or can only be switched off after the switching valve 62 has been closed to feed in the liquid medium 56, with the blower 50 being operated with a defined follow-up time after the switching valve 62 has been closed became.
  • the paint shop 10 has four fans 50.
  • the humidification device 54 has one or more atomizer nozzles 64 per blower 50 (cf. Fig.1 and 2 ).
  • the atomizer nozzles 64 are connected downstream of the blower 50 along the flow direction of the air stream 52.
  • the humidification device 64 is set up in such a way that the delivery amount of the liquid medium 56 is adjustable, in particular controllable, as explained above.
  • the blowers 50 are each designed as a blower unit 51, which is adjustable between a position of use and a position of non-use, in particular can be retracted or pivoted.
  • the cabin ceiling 18 80 recordings are formed (cf. Fig.1 and 2 ), into which one of the blower units 51 can be retracted or pivoted in when not in use (non-use position).
  • the blower units 51 each have a fan 53 which is surrounded by a housing 55.
  • the blower units 51 each have an input and an output. This allows a targeted air flow to be generated, for example a cone-shaped air jet.
  • the blower units 51 thus suck in the cabin space 14, i.e. use the already tempered cabin air.
  • the blower units 51 are each arranged in the upper third of the room of the paint booth 12 below the filter ceiling 19, with each blower unit 51 being located in a corner.
  • Each blower unit 51 can thus have an electrical line for feeding the electric blower motor, a fluid line for guiding the liquid medium 56, the compressed gas line 66 for providing excess pressure to the fluid line 58 'and / or the atomizer nozzles 64 into which the fluid line 58' respectively ends.
  • the humidification device 54 also has atomizer nozzles 65, which are arranged on the cabin ceiling 18 or filter ceiling 19.
  • the atomizer nozzles 65 are located below the cabin ceiling 18, so that in the open state (humidification operating state) they directly moisten the cabin space 14 or the receiving area 40.
  • the atomizer nozzles 65 can each be preceded by their own switching valve (not shown), so that the atomizer nozzles 65 can each be actuated or opened individually and/or independently of the atomizer nozzles 64 on the blower units 51.
  • the humidification device 54 is in particular set up in such a way that the atomizer nozzles 64 and the atomizer nozzles 65 can each be actuated or opened independently of one another or together.
  • the painting system 10 has a control and/or operating unit 90, which is equipped with a button 92 (cf. Fig.2 ).
  • the control and/or operating unit 90 is set up in such a way that moistening of the recording area 40 can be activated and/or deactivated by pressing the button 92.
  • the painting system 10 has a moisture sensor system for measuring the moisture in the receiving area 40 (not shown), the moisture sensor system being coupled to the switching valve 62 via the control and / or operating unit 90 in such a way that the delivery amount of liquid medium 56 depends on the measured humidity in the recording area 80 can be regulated or is regulated.
  • the moisture sensor system can optionally have a temperature sensor for detecting the temperature in the recording area 80 (not shown).
  • the method for painting a painted object 42 with a water-containing base coat and a moisture-curing clear coat in the cabin 12 of the painting system 10 can proceed as described below.
  • the painted object 42 will be introduced into the receiving area 40 of the cabin 12.
  • the painted object 42 can optionally be prepared, for example by masking and/or cleaning.
  • an air flow 52 directed towards the receiving area 40 is generated.
  • the blowers 50 are switched on and operated over a predetermined lead time so that the air flow 52 can develop sufficiently.
  • the liquid medium 56 is fed into the air stream 52 and atomized, so that the painted object 42 is moistened with the air stream 52 containing the atomized liquid medium 56 (aerosol) (humidification operating state).
  • the humidification device 54 is activated by opening the switching valve 62 arranged in the fluid line 58.
  • the liquid medium 56 which is pressurized, is fed into the air stream via the atomizer nozzles 64 and/or the atomizer nozzles 65 and is atomized.
  • the (still unprocessed) liquid medium 56 for example water coming from a domestic water connection, can be cleaned and/or processed by means of the processing device 67 before being fed into the air stream 52, as explained above.
  • a liquid antistatic agent 73 is fed into the liquid medium 56.
  • the metering valve 76 of the metering device 72 can be opened so that the antistatic agent is fed from the reservoir 74 into the fluid line 56.
  • the moistening of the painted object 42 is stopped before the painted object 42 is painted.
  • the metering valve 76 and the switching valve 62 are closed.
  • the blowers 50 are switched off after they have been operated for a predetermined follow-up time after the humidification has ended.
  • the painted object 42 is then painted with the base coat.
  • an air stream 52 directed towards the receiving area 40 is generated, so that the painted object 42 is exposed to the air stream 52.
  • the fans 50 are switched on. This helps the base coat dry.
  • the painted object 42 can be moistened and antistatized before painting the painted object 42 with the clear coat, analogous to moistening and antistatized before painting the base coat (described above). If humidification is carried out again, this is ended after a humidification period has elapsed, with the switching valve 62 and possibly also the metering valve 76 being closed. The fans 50 are then switched off, if necessary after a predetermined follow-up time has elapsed.
  • the painted object 42 is then painted with the clear varnish. After painting the painted object 42 with the clear coat, an air flow 52 directed towards the painted object 42 is generated.
  • the blowers 50 are switched on and operated over a predetermined lead time so that the air flow 52 can develop sufficiently.
  • the liquid medium 56 is fed into the air stream 52 and atomized so that the painted object 42 is contained in the air stream 52 the atomized liquid medium 56 (aerosol) is moistened.
  • the humidification device 54 is activated by opening the switching valve 62 arranged in the fluid line 58.
  • the liquid medium 56 which is pressurized, is fed into the air stream via the atomizer nozzles 64 and/or the atomizer nozzles 65 and is atomized.
  • the painted object 42 is thus moistened with the air stream 52 containing the atomized liquid medium 56. This allows the moisture-curing clear coat to harden.
  • the temperature in the paint booth 12 is increased to 30 to 40° Celsius. Antistatic agent 73 is not fed in during moistening to harden the clear coat.
  • the moistening of the receiving area 40 is stopped after painting the painted object 42 with the clear coat after the clear coat has completely hardened.
  • the switching valve 62 is closed.
  • the blowers 50 are switched off after they have been operated for a predetermined follow-up time after the humidification has ended.
  • the cabin 12 can then be ventilated.
  • FIG 4 shows a possible design of the painting system 10 as a combined painting and drying system.
  • the cabin 12 of the painting system 10 has a cabin space 14, for example divided by a partition 15, with a first cabin space section 14 'and a second cabin space section 14''.
  • each blower unit 51 has one or more atomizer nozzles 64 which are fluidly connected to the fluid line 58.
  • the atomizer nozzle(s) 64 of each blower unit 51 is preceded by a controllable switching valve 81, which can be opened by control, so that liquid medium 56 can be dispensed via the atomizer nozzles 64.
  • atomizer nozzles 65 are provided, each of which is arranged in the form of several spray rings 82.
  • a spray ring has several atomizer nozzles 65, in the example three atomizer nozzles 65.
  • the atomizer nozzles 65 are fluidly connected to the fluid line 58.
  • the atomizer nozzles 65 of each spray ring 82 are preceded by a controllable switching valve 83, which can be opened by control, so that liquid medium 56 can be dispensed via the atomizer nozzles 65.
  • the (master) switching valve 62 is connected upstream of the switching valves 83 in the fluid line.
  • the humidification device 54 is set up in such a way that the switching valves 81, 83 can be operated separately from one another. Liquid medium 56 can thus be dispensed either via the atomizer nozzles 64 or the atomizer nozzles 65 or together via the atomizer nozzles 64 and 65.
  • Atomizer nozzles 65 are provided, each of which can be arranged in the form of several spray rings 82. A part of the atomizer nozzles 65 is arranged above the filter cover 19 (atomizer nozzles 65') and another part of the atomizer nozzles 65 is arranged below the filter cover 19 (atomizer nozzles 65'').
  • the atomizer nozzles 65' can be used to indirectly humidify the second cabin space section 14'', since the filter ceiling 19 is moistened and the air flow, which is generated by a fan (not shown) arranged in the supply air duct 30, carries the liquid medium 56 into the second cabin space section 14'' travels with you.
  • Direct humidification of the second cabin space section 14'' can take place via the atomizer nozzles 65'', since the atomizer nozzles 65'' deliver the liquid medium 56 directly to the second cabin space section 14''.
  • the atomizer nozzles 65' and 65'' are fluidly connected to the fluid line 58, with a further switching valve 85 being provided, which can be opened by actuation. When the further switching valve 85 is actuated, liquid medium 56 is delivered to the second cabin space section 14'' via the atomizer nozzles 65 ', 65''.
  • painting can take place in the first cabin space section 14 'and drying of a painted object 42 can take place in the second cabin space section 14''.
  • a painted object 42 can take place in the first cabin space section 14 ' and then moved by displacement or transverse displacement into the second cabin space section 14 '', where (if necessary continued) drying of the painted object 42 takes place.
  • Figure 5 shows an embodiment of the painting system 10 as a drying room or post-reaction room. This configuration largely corresponds to the second cabin space section 14 '' in connection with Figure 4 described embodiment.
  • the drying room or post-reaction room 10 can be connected to a painting system 10.
  • the drying room or post-reaction room 10 can optionally be designed without floor suction, as shown here in the example.
  • the drying room or post-reaction room has atomizer nozzles 65 on the cabin ceiling 18, in the example of a filter ceiling 19, which can each be arranged in the form of several spray rings 82.
  • a part of the atomizer nozzles 65 is arranged above the filter cover 19 (atomizer nozzles 65') and another part of the atomizer nozzles 65 is arranged below the filter cover 19 (atomizer nozzles 65'').
  • the atomizer nozzles 65' and 65'' are fluidly connected to the fluid line 58, with a switching valve 85 being provided, which can be opened by actuation.
  • the switching valve 85 When the switching valve 85 is actuated, liquid medium 56 is delivered to the cabin space 14 via the atomizer nozzles 65 ', 65''. Drying or a subsequent reaction of the painted object 42 can take place in the cabin space 14 take place, whereby targeted humidification can be carried out by means of the atomizer nozzles 65 ', 65 ".

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EP23190561.3A 2022-08-09 2023-08-09 Installation de peinture et procédé de peinture d'un objet de peinture Pending EP4321260A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022120086.8A DE102022120086A1 (de) 2022-08-09 2022-08-09 Lackieranlage und Verfahren zum Lackieren eines Lackierobjekts

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Citations (5)

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Publication number Priority date Publication date Assignee Title
DE19912361A1 (de) 1999-03-19 2000-10-12 Tiemo Sehon Lackieranlage
DE19937193A1 (de) 1999-08-06 2001-02-15 Tiemo Sehon Verfahren zum Trocknen von wasserhaltigem Basislack sowie Einrichtung und Nachrüstsatz für Lackierkabinen zur Durchführung des Verfahrens
WO2018108746A1 (fr) * 2016-12-15 2018-06-21 Eisenmann Se Dispositif d'humidification d'un flux d'air
WO2019020796A2 (fr) * 2017-07-28 2019-01-31 Thomas Mayer Dispositif pour utiliser un gaz sous pression sur un dispositif de pulvérisation fonctionnant avec un gaz sous pression, procédé pour utiliser un gaz sous pression sur un dispositif de pulvérisation fonctionnant avec un gaz sous pression ainsi que procédé pour la pulvérisation d'un milieu liquide
EP3842153A1 (fr) * 2019-11-21 2021-06-30 Thomas Mayer Système d'alimentation en gaz de peinture, installation de peinture et procédé de fonctionnement d'une installation de peinture

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JPH01299672A (ja) 1988-05-26 1989-12-04 Nippon Paint Co Ltd 水系塗料塗装用ブースの運転方法
US5213259A (en) 1991-09-30 1993-05-25 Stouffer William D Paint booth humidity and temperature control system
WO2002043876A1 (fr) 2000-12-01 2002-06-06 Coots Timothy D Appareil de revetement de pieces usinees
DE102006008431A1 (de) 2006-02-23 2007-08-30 Rehau Ag + Co. Lackieranlage mit einer Spritzkabine mit Abscheidesystem
CN103769334B (zh) 2014-01-21 2018-05-11 易光华 全自动零排放表面无尘涂装设备
US11077459B2 (en) 2014-05-29 2021-08-03 Global Finishing Solutions Llc Directional air apparatuses, system, and methods of using the same
DE102020127893A1 (de) 2020-10-22 2022-04-28 Dürr Systems Ag Verfahren zum betreiben einer behandlungsanlage sowie behandlungsanlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19912361A1 (de) 1999-03-19 2000-10-12 Tiemo Sehon Lackieranlage
DE19937193A1 (de) 1999-08-06 2001-02-15 Tiemo Sehon Verfahren zum Trocknen von wasserhaltigem Basislack sowie Einrichtung und Nachrüstsatz für Lackierkabinen zur Durchführung des Verfahrens
WO2018108746A1 (fr) * 2016-12-15 2018-06-21 Eisenmann Se Dispositif d'humidification d'un flux d'air
WO2019020796A2 (fr) * 2017-07-28 2019-01-31 Thomas Mayer Dispositif pour utiliser un gaz sous pression sur un dispositif de pulvérisation fonctionnant avec un gaz sous pression, procédé pour utiliser un gaz sous pression sur un dispositif de pulvérisation fonctionnant avec un gaz sous pression ainsi que procédé pour la pulvérisation d'un milieu liquide
EP3842153A1 (fr) * 2019-11-21 2021-06-30 Thomas Mayer Système d'alimentation en gaz de peinture, installation de peinture et procédé de fonctionnement d'une installation de peinture

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