EP1998129A2 - Dispositif de séchage d'objets, en particulier de carrosseries de véhicule laquées - Google Patents

Dispositif de séchage d'objets, en particulier de carrosseries de véhicule laquées Download PDF

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Publication number
EP1998129A2
EP1998129A2 EP08008074A EP08008074A EP1998129A2 EP 1998129 A2 EP1998129 A2 EP 1998129A2 EP 08008074 A EP08008074 A EP 08008074A EP 08008074 A EP08008074 A EP 08008074A EP 1998129 A2 EP1998129 A2 EP 1998129A2
Authority
EP
European Patent Office
Prior art keywords
inert gas
gas atmosphere
drying
cooling medium
irradiation chamber
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.)
Granted
Application number
EP08008074A
Other languages
German (de)
English (en)
Other versions
EP1998129A3 (fr
EP1998129B1 (fr
Inventor
Werner Swoboda
Josef Krizek
Gerhard Steurer
Norbert Papenfuss-Janzen
Marco Kohls
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Eisenmann SE
Original Assignee
Bayerische Motoren Werke AG
Eisenmann Anlagenbau GmbH and Co KG
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 Bayerische Motoren Werke AG, Eisenmann Anlagenbau GmbH and Co KG filed Critical Bayerische Motoren Werke AG
Publication of EP1998129A2 publication Critical patent/EP1998129A2/fr
Publication of EP1998129A3 publication Critical patent/EP1998129A3/fr
Application granted granted Critical
Publication of EP1998129B1 publication Critical patent/EP1998129B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B05D3/06—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 exposure to radiation
    • B05D3/061—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 exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • 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
    • B05D3/04—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 exposure to gases
    • B05D3/0486—Operating the coating or treatment in a controlled atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • drying device is meant here all devices in which a coating material is transferred from the state after the application to the final state, be it by the removal of solvents, melting, crosslinking or the like.
  • the invention is based on the knowledge that the heat generated in the or the UV lamps as "waste" can be used meaningfully and in particular for heating the inert gas atmosphere, which is located in the drying tunnel. In this way, the performance of the used there Heating devices are reduced. This realization is not as banal as it may seem to sound at first. In fact, it requires a very intimate knowledge of the thermotechnical processes and processes in a generic drying device. Whether the recovery of heat generated in a given part of the plant and its reintroduction into the plant in another place is worthwhile requires more accurate calculations and investigations.
  • the cooling medium can preferably be coupled to the inert gas atmosphere via a heat exchanger.
  • the cooling medium which is preferably water or air, is separated from the inert gas atmosphere and the inert gas atmosphere is clean.
  • the cooling medium in the heating region is thermally coupled to the inert gas atmosphere of the drying tunnel.
  • the painted and dried articles are first fed into the drying tunnel into an area of increasing temperature to initiate drying operations by initially slow heating, which are often associated with the evolution of gases and / or vapors. Since in this area, as mentioned, the temperature of the inert gas atmosphere is still relatively low, coming from the or the UV lamps, heated and not too high temperature having cooling medium there is particularly well to support the heaters.
  • Condensate traps are preferably used to remove condensable impurities from the inert gas atmosphere.
  • the condensate traps can be energetically connected to the evaporator device for energy saving be coupled.
  • a plurality of UV lamps is arranged on at least one wall of the UV irradiation chamber such that they can irradiate the object located in the UV irradiation chamber surface.
  • both the side walls and the ceiling of the UV irradiation chamber are provided with surface UV lamps.
  • UV lamps in a portal in such a way that the object to be irradiated can move through the portal.
  • the arrangement of UV lamps in such portals is rather linear. Frequently more powerful UV lamps are used in portals than in the case of planar arrangement.
  • one or more UV lamps can also be attached to the arm of a robot, with which they can be introduced into these interiors.
  • FIG. 1 Reference is made, in which a generally designated by the reference numeral 1 drying device for vehicle bodies is shown in vertical section and in the overall overview.
  • This drying device 1 is integrated into a painting line. It is preceded by the actual paint booth to think in which the vehicle bodies, which are provided in the figures with the reference numeral 2, are coated with a varnish in an inert gas atmosphere and UV curing varnish.
  • Downstream of in FIG. 1 The drying device shown is a cooling device in which the dried, so provided with a polymerized paint layer vehicle bodies 2 are cooled to a suitable temperature for further processing. Both the upstream paint booth and the downstream cooling device are of conventional construction and are therefore not described in detail.
  • the vehicle bodies 2 are cyclically or continuously moved through the drying device 1 by means of a conveyor system, not shown, and in the direction of the arrow 3 of FIG. 1 ie in FIG. 1 left to right.
  • the vehicle bodies 2 first pass into a so-called A lock 4, in which they be raised by a lifting device 5 to a higher level.
  • a lock 4 which is known to those skilled in the art, in the present case not only in the saving of heat energy but also in the vehicle bodies 2 from the "normal atmosphere" in which they are at the lower level, in an inert gas atmosphere, which prevails in the parts of the drying device 1 described below.
  • the vehicle bodies 2 From the A lock 4, the vehicle bodies 2, following the direction of the arrow 3, enter into different drying chambers 6 of the drying device 1, which together form a drying tunnel. All these drying chambers 6 are heated in a known manner by means of a circulating air heater, not shown, to a certain temperature. In the first drying chambers 6, this temperature rises initially; this area is called “heating zone”. After passing through the heating zone, the vehicle bodies 2 fall into a series of drying chambers 6, in which essentially a constant temperature is maintained.
  • the number of drying chambers 6 belonging to the heating zone and the number of drying chambers 6 belonging to the "holding zone" is chosen according to the respective requirements and is in FIG. 1 only as an example.
  • the vehicle bodies 2 After passing through all the drying chambers 6, the vehicle bodies 2 are transported by means of the conveyor system into a UV irradiation chamber, which bears the reference numeral 7 as a whole.
  • the UV irradiation chamber 7 in turn is divided into three sections 7a, 7b, 7c.
  • a multiplicity of UV lamps 8 are arranged along the chamber walls, which as it were allow a "total illumination" of the vehicle bodies 2 from the sides and from above.
  • the vehicle body After going through the intermediate zone 7b which is free from UV lamps, the vehicle body is guided into the section 7c in which UV lamps 9 are mounted on robots with which the interior is irradiated after the doors and / or hoods have been opened by door / hood opener systems.
  • At least the two A-locks 4, 12 and the piston lock 11 and the UV-irradiation chamber 7 are provided with inlet and outlet ports, for example in the form of lifting gates, which are opened only to the passage of a vehicle body 2 and so an atmospheric separation to adjacent Ensure chambers of the drying device 1. Details in this connection are not of interest here.
  • cooling circuits are provided, through which a cooling medium circulates.
  • the latter may be a gas or a liquid.
  • the following is based on the use of cooling water.
  • the heated by the UV lamps 8, 9 cooling water is supplied via the line 15 against the direction of movement (arrow 3) of the vehicle bodies 2 the first two drying chambers 6 in the heating of the drying device 1, where they in a not shown Heat exchangers deliver a part of their heat content to the atmosphere circulated there. In this way, 6 heating energy is saved in the first two drying chambers.
  • the cooled cooling water is returned via the line 16 back into the UV irradiation chamber 7 and there to the UV lamps 8, 9.
  • condensate traps 17, 18, which may optionally be cooled and on which auskondensierbare impurities from the atmosphere of the drying chambers 6 can be removed. You can be energetically coupled with the evaporator described in more detail below, so that energy is saved here.
  • the interior of the drying device 1 is filled with inert gas, for example with nitrogen, CO 2 , a noble gas or an oxygen-poor flue gas.
  • inert gas for example with nitrogen, CO 2 , a noble gas or an oxygen-poor flue gas.
  • the inert gas atmosphere begins in the upper region of the A lock 4 and ends in the piston lock 11.
  • the piston lock 11 is provided to prevent inert gas losses with a piston 19 whose base surface (seen from above) is adapted to the horizontal cross section of the piston lock chamber. If there is no vehicle body in the piston lock 11, the piston 19 can be pressed down. In this case, the inert gas atmosphere located there is introduced via a line 20 in that drying chamber 6, with which the holding zone of the drying device 1 begins. Via a further line 21, the inert gas atmosphere located in this drying chamber 6 is guided back into the piston lock 11. This replacement of the inert gas serves, in particular, for rinsing the vehicle bodies 2, which enter the holding area of the drying device 1, to completely remove adherent normal atmosphere.
  • a storage tank 22 is arranged, in which liquid inert gas, for example liquid nitrogen, is located. With an evaporator device, not shown, the inert gas can be evaporated as needed.
  • the storage tank 22 is connected via a line 23 to the interior of a cylinder 24, in which a piston 25 by means of a suitable drive device is movable.
  • Another line 26 connects the interior of the cylinder 24 with the interior of the UV irradiation chamber 7.
  • the lines 23 and 26 include valves, not shown, as required for the operation described below.
  • the line 23 can also be passed through heat exchangers of the condensate traps 17, 18, so that on the one hand the condensate traps 17, 18 are cooled and on the other hand the inert gas fed to the UV irradiation chamber 7 is heated.
  • the drying device 1 described above operates as follows:
  • the freshly painted and only a slight evaporation subjected to vehicle bodies 2 are retracted by means of the conveyor system in the A lock 4 and there brought by means of the lifting mechanism 5 to the higher level.
  • the vehicle bodies 2 already pass into an inert gas atmosphere which, in countercurrent, coming from the UV irradiation chamber 7, has passed through all the chambers of the drying apparatus 1. Due to carryover of normal atmosphere, the inert gas atmosphere in the region of the inlet A lock 4 is the most heavily polluted. There the polluted inert gas is withdrawn via another line 27 and either discarded or reused after cleaning.
  • the vehicle bodies 2 now move to the higher level in FIG. 1 to the right (direction of arrow 3) and get into the first drying chambers 6 of the drying tunnel. There, they are heated at still benzossisgrade low temperatures of the circulating atmosphere, which has received its heat content at least partially from the UV lamps 8, 9 in the UV irradiation chamber 7. On the way through the heating zone, the temperature is slowly increased.
  • the individual drying chambers 6 can be separated from each other by gates, but they do not have to. In any case, it is advantageous if the atmospheres in the individual drying chambers 6 are somewhat separated from one another so that a defined temperature profile in the heating zone can be maintained. Condensable substances that evaporate from the vehicle bodies 6 in the heating zone are condensed out with the condensate trap 17 and removed.
  • the vehicle bodies 2 then enter the first drying chamber 6 of the holding zone. There they are, as already explained above, purged with inert gas, which comes from the piston lock 11, where the inert gas atmosphere is still relatively clean. On further passage through the drying chambers 6 of the holding zone any remaining solvents are expelled and the coating material prepared for crosslinking. Condensable material accumulating in this area is removed via the condensate trap 18 so that the inert gas is not contaminated unnecessarily.
  • the vehicle bodies 2 enter the UV irradiation chamber 7 on.
  • the inert gas atmosphere must be the cleanest so as not to interfere with the crosslinking process that takes place under the influence of the UV light emitted by the UV lamps 8, 9. Therefore, the UV irradiation chamber 7 at regular intervals, in the extreme case at each cycle of the drying device 1, newly filled with inert gas.
  • the filling with inert gas must be done quickly. Since the evaporation of liquid inert gas in the reservoir 22 by evaporators with reasonable power can not proceed indefinitely, the piston-cylinder unit 24, 25 is provided. She works as follows:
  • the evaporator means in the storage tank 22 continuously generates gaseous inert gas. This accumulates in the cylinder 24, wherein the piston 25 is moved back accordingly. At the end of the irradiation time, as much gaseous inert gas has accumulated in the cylinder 24, as is required for the next irradiation process in the UV irradiation chamber 7.
  • the vehicle bodies 2 are thus in a highly pure inert gas atmosphere within the UV irradiation chamber 7 initially irradiated by the UV lamps 8, which illuminate surface of the two sides and from above the vehicle body 2.
  • the polymerization of the coating material takes place on the outer surfaces of the vehicle bodies 2.
  • the interiors of the vehicle bodies 2 are irradiated by the UV lamps 9 guided by robots.
  • the vehicle bodies 2 are first introduced into the piston lock 11 and then from this into the upper region of the A-lock 12.
  • the lifting device 13 By lowering the lifting device 13, the vehicle bodies 2 return to the low level and leave the drying device 1 via the outlet chambers 14 in the direction of the cooling device.
  • Part of the waste heat of the UV lamps 8, 9 can also be used to preheat the inert gas introduced from the storage tank 22 via the cylinder 24 into the UV irradiation chamber 7 or to operate the condensate traps 17, 18.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Coating Apparatus (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP20080008074 2007-05-26 2008-04-26 Dispositif de séchage d'objets, en particulier de carrosseries de véhicule laquées Expired - Fee Related EP1998129B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710024745 DE102007024745A1 (de) 2007-05-26 2007-05-26 Vorrichtung zum Trocknen von Gegenständen, insbesondere von lackierten Fahrzeugkarosserien

Publications (3)

Publication Number Publication Date
EP1998129A2 true EP1998129A2 (fr) 2008-12-03
EP1998129A3 EP1998129A3 (fr) 2013-05-29
EP1998129B1 EP1998129B1 (fr) 2015-01-14

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EP (1) EP1998129B1 (fr)
DE (1) DE102007024745A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102233317A (zh) * 2011-04-20 2011-11-09 江苏剑桥涂装工程有限公司 一种直燃式送风加热装置
DE102015017278B3 (de) 2015-07-31 2019-04-04 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102015017280B3 (de) 2015-07-31 2019-04-04 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102015017279B3 (de) 2015-07-31 2019-04-04 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
US10584920B2 (en) 2015-07-31 2020-03-10 Dürr Systems Ag Treatment installation and method for treating workpieces
US10697702B2 (en) 2015-07-31 2020-06-30 Dürr Systems Ag Treatment installation and method for treating workpieces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013004136A1 (de) 2013-03-09 2014-09-11 Volkswagen Aktiengesellschaft Vorrichtung zum Trocknen eines Werkstücks und Verfahren zum Betrieb einer derartigen Vorrichtung
DE102015224916A1 (de) 2015-12-10 2017-06-14 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004025525B3 (de) 2004-05-25 2005-12-08 Eisenmann Maschinenbau Gmbh & Co. Kg Verfahren und Vorrichtung zum Trocknen von Gegenständen, insbesondere von lackierten Fahrzeugkarosserien

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US4143468A (en) * 1974-04-22 1979-03-13 Novotny Jerome L Inert atmosphere chamber
DE10255419A1 (de) * 2002-11-28 2004-06-09 Air Liquide Gmbh UV-Härtung von Lacken mit Inertisierung
EP1413416B1 (fr) * 2002-10-25 2012-05-23 Air Liquide Deutschland GmbH Dispositif de durcissage par rayonnement
DE102004023536B4 (de) * 2003-07-24 2007-12-27 Eisenmann Anlagenbau Gmbh & Co. Kg Vorrichtung zur Aushärtung einer aus einem Material, das unter elektromagnetischer Strahlung aushärtet, insbesondere aus einem UV-Lack oder aus einem thermisch aushärtenden Lack, bestehenden Beschichtung eines Gegenstandes
DE102004025528B4 (de) * 2004-05-25 2010-03-04 Eisenmann Anlagenbau Gmbh & Co. Kg Verfahren und Vorrichtung zum Trocknen von beschichteten Gegenständen
DE102005050371B4 (de) * 2005-10-20 2012-08-16 Sturm Maschinenbau Gmbh Anlage und Verfahren zum Strahlungshärten einer Beschichtung eines Werkstückes unter Schutzgas

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE102004025525B3 (de) 2004-05-25 2005-12-08 Eisenmann Maschinenbau Gmbh & Co. Kg Verfahren und Vorrichtung zum Trocknen von Gegenständen, insbesondere von lackierten Fahrzeugkarosserien

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102233317A (zh) * 2011-04-20 2011-11-09 江苏剑桥涂装工程有限公司 一种直燃式送风加热装置
CN102233317B (zh) * 2011-04-20 2013-05-01 江苏剑桥涂装工程有限公司 一种直燃式送风加热装置
DE102015017278B3 (de) 2015-07-31 2019-04-04 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102015017280B3 (de) 2015-07-31 2019-04-04 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102015017279B3 (de) 2015-07-31 2019-04-04 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
US10584920B2 (en) 2015-07-31 2020-03-10 Dürr Systems Ag Treatment installation and method for treating workpieces
US10697702B2 (en) 2015-07-31 2020-06-30 Dürr Systems Ag Treatment installation and method for treating workpieces
CN111570222A (zh) * 2015-07-31 2020-08-25 杜尔系统股份公司 处理设备和用于处理工件的方法
US11112177B2 (en) 2015-07-31 2021-09-07 Dürr Systems Ag Treatment installation and method for treating workpieces
US11674752B2 (en) 2015-07-31 2023-06-13 Dürr Systems Ag Treatment installation and method for treating workpieces
US11740021B2 (en) 2015-07-31 2023-08-29 Dürr Systems Ag Treatment installation and method for treating workpieces

Also Published As

Publication number Publication date
EP1998129A3 (fr) 2013-05-29
DE102007024745A1 (de) 2008-11-27
EP1998129B1 (fr) 2015-01-14

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