WO2015169413A1 - Installation et dispositif de revêtement d'objets - Google Patents

Installation et dispositif de revêtement d'objets Download PDF

Info

Publication number
WO2015169413A1
WO2015169413A1 PCT/EP2015/000714 EP2015000714W WO2015169413A1 WO 2015169413 A1 WO2015169413 A1 WO 2015169413A1 EP 2015000714 W EP2015000714 W EP 2015000714W WO 2015169413 A1 WO2015169413 A1 WO 2015169413A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating liquid
pump
dip tank
coating
filtrate
Prior art date
Application number
PCT/EP2015/000714
Other languages
German (de)
English (en)
Inventor
Roland Barwich
Original Assignee
Eisenmann Se
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eisenmann Se filed Critical Eisenmann Se
Priority to EP15717801.3A priority Critical patent/EP3140437A1/fr
Priority to US15/309,682 priority patent/US20170137957A1/en
Publication of WO2015169413A1 publication Critical patent/WO2015169413A1/fr
Priority to US16/512,520 priority patent/US20190338437A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes
    • C25D13/24—Regeneration of process liquids
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes

Definitions

  • the invention relates to a system for coating, in particular for electrodeposition, of objects, in particular of vehicle wheels, having a) a dip tank which is filled with a coating liquid into which the objects can be immersed.
  • the invention relates to an associated method for coating objects.
  • the dip coating in particular the electrodeposition coating, is a widely used method in the automotive industry for coating objects, in particular for painting vehicle bodies and parts thereof, such as the vehicle wheels.
  • the objects are immersed in a dip tank in a conductive, mostly aqueous coating liquid and set by applying a field of stress between the immersed objects and in the tympanum arranged electrodes of the coating process in motion.
  • the deposition of the lacquer on the objects takes place essentially via an electrochemical conversion of binders and lacquer pigments due to the current flow between the electrodes and the electrodes.
  • ATL anodic
  • KTL cathodic
  • the composition of the coating liquid changes locally at the objects, for example due to the discharge of the color pigments adhering to the coated objects from the coating liquid.
  • the physical and chemical parameters of the coating liquid are kept homogeneous throughout the dip tank.
  • the parameters of the coating liquid are then set in total via further cycles. For example, the provision of a filtration circuit is known, with which continuously a small partial flow. the coating liquid of solid constituents, such as the paint pigments, is freed. This so-called retentate is added again to the coating liquid after appropriate treatment.
  • the filtrate is used, for example after adjusting the pH, for rinsing the painted objects. Furthermore, it is known to provide a heat exchanger ice-skating with which the heat, which is introduced into the coating liquid by the electrical power of the electrocoating, can be dissipated again.
  • Pump outlet wherein the pump inlet is at least indirectly connected to the dip tank, at least one circulation outlet for the coating liquid arranged in the dip tank, and a filtration device whose inlet is connected to the pump outlet of the pump and which has a retentate connection and a filtrate connection, wherein the retentate port is connected to the at least one recirculation outlet in the plunge pool.
  • the inventor has recognized that, in particular in systems for coating smaller objects such as vehicle wheels, it is not necessary to provide separate flow circuits for the filtration and for the circulation of the coating liquid. Because at. a sufficiently large one - -
  • the deposited retentate can take over the function of circulating the coating liquid in the dip tank when it is fed via Umicalzauslässe in the dip tank. In this way, the recycled retentate generates the necessary bath movements of the coating liquid in the dip tank.
  • Such circulating outlets are known as such and preferably have injector nozzles with which, in particular in the bottom area of the immersion basin, turbulences are generated which agitate settled solid constituents of the coating liquid. Since, according to the invention, only one combined recirculation and filtration circuit is required instead of a plurality of separate circuits or subcircuits, the overall result is a simplification of the system.
  • an overflow basin in which the coating liquid can overflow from the dip tank, in which case the pump inlet of the pump is connected to the overflow basin.
  • the coating liquid is extracted indirectly from immersion tanks, which is due to a resulting overflow flow in the.
  • Overflow pool Accumulate contamination of the coating liquid.
  • the pump of the recirculation and filtration circuit is designed as a submersible pump and arranged in the overflow basin.
  • This has the advantage over the prior art that with respect to the sealing of the pump less to no requirements must be met. Because usually normal pump of Umisselznikanks due to the aggressive nature of the coating liquid only schanane shaft seals can be used so that on the seals of the pump escaping coating liquid must be removed in a separate separate circuit.
  • the retentate port of the filter device and the circulation outlet in the dip tank are preferably connected to one another without the interposition of a buffer reservoir.
  • the combined recirculation and filtration circuit can be operated with only one pump.
  • the filtration device may comprise an ultrafiltration module, whereby a sufficiently purified filtrate is discharged.
  • the circulation and filtration circuit can comprise a temperature control device, preferably arranged upstream of the filtration device, in particular a heat exchanger, with which heat can be withdrawn or supplied to the coating liquid. In this way, can be dispensed with a separate heat exchanger circuit for the coating liquid, as it is commonly used in the prior art.
  • a temperature control device preferably arranged upstream of the filtration device, in particular a heat exchanger, with which heat can be withdrawn or supplied to the coating liquid.
  • a separate heat exchanger circuit for the coating liquid as it is commonly used in the prior art.
  • directly via a arranged in the dip tank tempering, z As a cooling coil, the coating liquid heat withdrawn or supplied.
  • an additional counter container circuit may be provided, which comprises a sealless pump, in particular a diaphragm pump, with which the coating liquid can be promoted in particular for maintenance work on the dip tank in a counter container and back again.
  • the filtrate connection of the filtration device is at least indirectly connected to a purging basin in which the articles are stored after - -
  • a buffer memory can be interposed, in which filtrate obtained at the filtrate connection is kept ready for cleaning purposes, in particular for manual cleaning purposes of the system.
  • Figure 1 is a schematic representation of a system for
  • Figure 2 is a schematic representation of a modified
  • Figure 1 shows a generally designated 10 for conditioning cataphoretic 'dip painting of vehicle wheels 12th
  • the plant 10 comprises a dip tank 14, which with a - -
  • Electrodeposition paint 16 is filled as a coating liquid.
  • the vehicle wheels 12 to be painted are lowered into the dip tank 14 with the aid of a delivery device 18 which is only partially shown, and thereby partially or completely immersed in the electrodeposition coating 16, which is composed essentially of demineralized water, binders and paint pigments and other known additives.
  • a delivery device 18 which is only partially shown, and thereby partially or completely immersed in the electrodeposition coating 16, which is composed essentially of demineralized water, binders and paint pigments and other known additives.
  • an overflow basin 22 is provided here in the form of a channel running along the dip tank 14, into which excess electrocoating 16, as indicated by the flow arrow 24, can overflow.
  • excess electrocoating 16 as indicated by the flow arrow 24
  • conversion products of the electrolytic varnish 16 and other impurities are entrained, whereby a foam crown 26 is formed in the overflow basin 22 above the electrolytic varnish 16.
  • the circulating and filtration circuit 30 first comprises a pump, which is designed here as an immersion pump 34 arranged in the overflow basin 22 with an inlet 35. From the outlet 37, a line 36 leads to the primary side of a heat exchanger 38, the secondary side is connected via lines 40, 42 to a not shown cooling system. - -
  • a line 44 to a filter device 46, more precisely to a pre-filter 48 of the filter device 46.
  • a pre-filter 48 leads a further line 50 to an ultrafiltration module 52 of the filter device 46, which a retentate port 54 and a filtrate port 56 as outlets of the filter device .46 has.
  • the retentate port 54 of the filter device 46 at which a solid component enriched retentate is discharged, is connected via a line 58 to one or more arranged in the dip tank 14, Umisselzauslässen 60, which are each provided with an injector 62.
  • the Umisselzauslässe 60 are arranged and dimensioned so that with appropriate dimensioning of the retentate throughput (which is essentially controlled by the capacity of the submersible pump 34) in the plunge pool 14 sufficient Umisselzströmung 32 is generated to prevent settling of solid components and homogenization of
  • the filtrate connection 56 of the filter device 46 on which essentially the aqueous constituents of the electrocoat material 16 are delivered as filtrate, is, in contrast, connected via a line 64 to a sink 66.
  • the vehicle wheels are rinsed 12 process after the 'coating, for example, to remove non-adherent, excess paint.
  • the rinse water 68 (contaminated filtrate), which is then partially enriched again with coating pigments, is circulated in the sink 66 via a further submersible pump 70 arranged in the sink 66 and associated circulating outlets 60.
  • a line 74 leads from the overflow outlet 72 arranged in the upper region of the sink 66 to the overflow basin 22 of the dip tank 14, in order to prevent overflow.
  • a dialysis circuit 76 (only partially sketched) cooperating with the electrodes 20 is also provided.
  • This comprises tubular exchange membranes 78, which surround the most rod-shaped electrodes 20 coaxially. The interior of the exchange membranes 78 is then flushed with dialysis fluid during the coating process in order to reduce the acid content.
  • the dip tank 14 is connected via a counter container circuit 80 with a counter container 82, which can absorb all the electrocoating 16 from the dip tank 14 and thus allows the plunge pool 14 for maintenance purposes or the like to empty completely without having to dispose of the electrocoating 16
  • the countercontainer circuit 80 comprises for this purpose a valve arrangement 84 and a diaphragm pump 86, wherein in a first position of the valve arrangement 84 the electrocoat 16 can be conveyed by the diaphragm pump 86 from the plunge pool 14 into the countercontainer 82.
  • the diaphragm pump 86 In a second position of the valve assembly, the diaphragm pump 86, along with circulation outlets 60 disposed in the counter reservoir 82, may be used to create a recirculation flow 88 in the counter reservoir 82 during maintenance operations. In a third position of the valve arrangement 84, the same diaphragm pump 86 can be used to return the electrodeposition coating 16 to the immersion basin 14. - -
  • FIG. 2 shows a slightly modified variant of the system 10, in which the filtrate connection 56 of the filter device 46 is not connected directly to the sink 66. Instead, there leads the outgoing from the filtrate port 56 line 64 to a buffer tank 90, in which the filtrate is provided, for example, for manual cleaning purposes of the system 10.
  • a further line 92 at the bottom of the buffer container 92 then leads analogously to the exemplary embodiment of FIG. 1 into the sink 66.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

L'invention concerne une installation (10) de revêtement d'objets (12), en particulier de roues de véhicule, qui comprend une cuve d'immersion (14) qui est remplie avec un liquide de revêtement (16), dans laquelle des objets (12) peuvent être immergés. Afin de réduire la complexité de la tuyauterie d'installations semblables connues, l'invention propose un circuit combiné de circulation et de filtration (30) pour faire circuler et filtrer le liquide de revêtement (16), le circuit de circulation et de filtration (30) comprenant une pompe (34), au moins une sortie de circulation (70) disposée dans la cuve d'immersion (14) pour le liquide de revêtement (16) et un dispositif de filtration (48) qui comprend un orifice de rétentat (54) et un orifice de filtrat (56), l'orifice de rétentat (54) étant lié avec l'au moins une sortie de circulation (70) dans la cuve d'immersion (14).
PCT/EP2015/000714 2014-05-09 2015-04-01 Installation et dispositif de revêtement d'objets WO2015169413A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP15717801.3A EP3140437A1 (fr) 2014-05-09 2015-04-01 Installation et dispositif de revêtement d'objets
US15/309,682 US20170137957A1 (en) 2014-05-09 2015-04-01 Installation and method for coating objects
US16/512,520 US20190338437A1 (en) 2014-05-09 2019-07-16 Installation and method for coating objects

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014006795.5A DE102014006795B4 (de) 2014-05-09 2014-05-09 Anlage und Verfahren zum Beschichten von Gegenständen
DE102014006795.5 2014-05-09

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US15/309,682 A-371-Of-International US20170137957A1 (en) 2014-05-09 2015-04-01 Installation and method for coating objects
US16/512,520 Continuation US20190338437A1 (en) 2014-05-09 2019-07-16 Installation and method for coating objects

Publications (1)

Publication Number Publication Date
WO2015169413A1 true WO2015169413A1 (fr) 2015-11-12

Family

ID=52997389

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/000714 WO2015169413A1 (fr) 2014-05-09 2015-04-01 Installation et dispositif de revêtement d'objets

Country Status (4)

Country Link
US (2) US20170137957A1 (fr)
EP (1) EP3140437A1 (fr)
DE (1) DE102014006795B4 (fr)
WO (1) WO2015169413A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016005371A1 (de) 2016-05-04 2017-11-09 Eisenmann Se Vorrichtung und Verfahren zur Messung von mindestens einem Parameter einer Behandlungsflüssigkeit in einer Oberflächenbehandlungsanlage
US11352292B2 (en) * 2019-01-30 2022-06-07 Ppg Industries Ohio, Inc. Method for preparing optical articles with multi-layer antireflective coatings

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534918A1 (de) * 1975-05-08 1976-11-11 Hajtomuevek Es Festoberendeze Elektrische tauchfaerbeeinrichtung
DE2744218A1 (de) * 1977-09-30 1979-04-05 Timm Von Hofmann Verfahren zum austausch und erneuern von elektrolyten, chemischen prozessloesungen und spuelwaessern in galvanisiertrommeln
DE2919305B1 (de) * 1979-05-14 1980-10-23 Huras Hans Verfahren zum Betrieb einer Elektrophorese-Lackieranlage und Vorrichtung zur Durchfuehrung des Verfahrens
EP0376222A1 (fr) * 1988-12-23 1990-07-04 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Procédé et appareillage pour le dépôt par électrophorèse d'une laque sur de petits objets en vrac
DE9203653U1 (fr) * 1992-03-18 1992-07-30 Eisenmann Maschinenbau Kg (Komplementaer: Eisenmann-Stiftung), 7030 Boeblingen, De
DE10132349A1 (de) * 2001-07-04 2003-01-30 Eisenmann Foerdertech Verfahren und Anlage zur elektrophoretischen, insbesondere kataphoretischen, Tauchlackierung von Gegenständen
DE102006019042A1 (de) * 2006-04-25 2007-10-31 Hestermann, Gerhard Verfahren zur Verminderung von Oberflächenstörungen an in Elektrotauchlackieranlagen aufgetragenen Lackschichten

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US3705847A (en) * 1970-09-21 1972-12-12 Weyerhaeuser Co Method for forming a uniform continuous web of paper
US4026775A (en) * 1974-03-06 1977-05-31 Kaiser Aluminum & Chemical Corporation Electrocoating bath temperature control
DE3230660C1 (de) * 1982-08-02 1984-01-26 Basf Farben + Fasern Ag, 2000 Hamburg Verfahren und Vorrichtung zur Durchfuehrung einer Elektrotauchlackierung sowie Anwendung
US6139708A (en) * 1987-08-08 2000-10-31 Nissan Motor Co., Ltd. Dip surface-treatment system and method of dip surface-treatment using same
US5009758A (en) * 1988-08-16 1991-04-23 Mazda Motor Manufacturing (Usa) Corp. Closed noncontinuous electrodeposition painting system
DE19741096C2 (de) * 1997-09-18 2002-01-31 Wurster Gerd Verfahren zum Lackieren von Teilen und Lackieranlage
DE202006006600U1 (de) * 2006-04-25 2007-09-06 Hestermann, Gerhard Einrichtung zur Umwälzung, Filtrierung und Temperierung von in Elektrotauchlackieranlagen aufzutragenden Lacken
DE102010054932A1 (de) * 2010-12-17 2011-08-25 Daimler AG, 70327 Anlage und Vorrichtung zum Lackieren eines Objekts

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534918A1 (de) * 1975-05-08 1976-11-11 Hajtomuevek Es Festoberendeze Elektrische tauchfaerbeeinrichtung
DE2744218A1 (de) * 1977-09-30 1979-04-05 Timm Von Hofmann Verfahren zum austausch und erneuern von elektrolyten, chemischen prozessloesungen und spuelwaessern in galvanisiertrommeln
DE2919305B1 (de) * 1979-05-14 1980-10-23 Huras Hans Verfahren zum Betrieb einer Elektrophorese-Lackieranlage und Vorrichtung zur Durchfuehrung des Verfahrens
EP0376222A1 (fr) * 1988-12-23 1990-07-04 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Procédé et appareillage pour le dépôt par électrophorèse d'une laque sur de petits objets en vrac
DE9203653U1 (fr) * 1992-03-18 1992-07-30 Eisenmann Maschinenbau Kg (Komplementaer: Eisenmann-Stiftung), 7030 Boeblingen, De
DE10132349A1 (de) * 2001-07-04 2003-01-30 Eisenmann Foerdertech Verfahren und Anlage zur elektrophoretischen, insbesondere kataphoretischen, Tauchlackierung von Gegenständen
DE102006019042A1 (de) * 2006-04-25 2007-10-31 Hestermann, Gerhard Verfahren zur Verminderung von Oberflächenstörungen an in Elektrotauchlackieranlagen aufgetragenen Lackschichten

Also Published As

Publication number Publication date
US20190338437A1 (en) 2019-11-07
US20170137957A1 (en) 2017-05-18
EP3140437A1 (fr) 2017-03-15
DE102014006795B4 (de) 2018-02-15
DE102014006795A1 (de) 2015-11-12

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