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WO1998019124A1 - Procede et dispositif pour secher des couches minces - Google Patents

Procede et dispositif pour secher des couches minces Download PDF

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Publication number
WO1998019124A1
WO1998019124A1 PCT/EP1997/005650 EP9705650W WO9819124A1 WO 1998019124 A1 WO1998019124 A1 WO 1998019124A1 EP 9705650 W EP9705650 W EP 9705650W WO 9819124 A1 WO9819124 A1 WO 9819124A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
drying
housing
dry air
layers
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.)
Ceased
Application number
PCT/EP1997/005650
Other languages
German (de)
English (en)
Inventor
Dietmar Gath
Claus Hellmann
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.)
HELLMANN-HYGREX LUFT- und KLIMATECHNIK GmbH
Original Assignee
HELLMANN-HYGREX LUFT- und KLIMATECHNIK GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7810187&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1998019124(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to DE59707933T priority Critical patent/DE59707933D1/de
Priority to AU51189/98A priority patent/AU5118998A/en
Priority to DE19781220D priority patent/DE19781220D2/de
Priority to DK97945828T priority patent/DK0934497T3/da
Priority to AT97945828T priority patent/ATE221981T1/de
Application filed by HELLMANN-HYGREX LUFT- und KLIMATECHNIK GmbH filed Critical HELLMANN-HYGREX LUFT- und KLIMATECHNIK GmbH
Priority to CA002269982A priority patent/CA2269982A1/fr
Priority to EP97945828A priority patent/EP0934497B1/fr
Priority to DE19781220A priority patent/DE19781220C1/de
Publication of WO1998019124A1 publication Critical patent/WO1998019124A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
    • 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

  • the invention relates to a method for drying thin layers (thin layers) based on water, solvent or alcohol, which have been applied to objects by spraying, dipping or brushing, and a device for carrying out the method.
  • the materials described are used for coating a wide variety of objects, for example for coating and painting auto parts, machine components, metal sheets and the like.
  • the coatings are applied and then dried.
  • drying is carried out either by infrared radiation or by passing warm air over the coated objects, so that the drying is carried out by heat convection.
  • the coated objects are simultaneously exposed to warm air and an additional infrared radiation.
  • the workpieces are heated to 60 ° C to 120 ° C in order to evaporate the moisture contained in the thin layer.
  • the methods belonging to the prior art have the disadvantage that they are very energy-intensive and time-consuming, the latter in particular by heating the workpiece on which the thin layer is applied, so that drying takes several hours.
  • the workpieces after drying, the workpieces must be reduced from their heating temperature, i.e. from 60 ° C to 120 ° C, to approximately 30 ° C. be cooled so that these parts can be further processed and these parts can be handled.
  • a major disadvantage is also the formation of skin over still moist base layers when painting with warm air and the heating of the workpieces to high temperatures.
  • the technical problem on which the invention is based consists of a drying method and a device Specification for performing the method, in which the drying time is significantly reduced, in which there is a significantly lower energy consumption, and which is also applicable to heat-sensitive parts.
  • air used for drying, which has a relative humidity between 0% and 30%, preferably a relative humidity of about 10% (dry air), and in that the dry air over and / or around the workpiece to be dried is conducted, the dry air absorbs the moisture of the thin layer applied to the workpiece.
  • dry air absorbs the moisture of the thin layer applied to the workpiece.
  • the fact that the workpiece is supplied with dry air at all times maintains an approximately equal vapor pressure difference, which accelerates the evaporation of moisture on the workpiece surface. The moisture released in vapor form is immediately absorbed by the ambient air.
  • the dry air is obtained by cooling so-called “moist air”, ie air with a relative humidity of more than 40%, in a dry air unit by condensation. After dewatering, the air is warmed up again and fed to the paint to absorb moisture.
  • misist air ie air with a relative humidity of more than 40%
  • the dry air absorbs the moisture of the thin layer on the workpieces.
  • the workpieces are in a housing.
  • the housing can be designed as a cabinet for receiving the workpieces, in which, for example, large workpieces, such as lower parts of buses or the like, are arranged.
  • the drying process according to the invention represents a closed system in which no exhaust air is produced. This has the advantage that no odorous substances, no moisture and no heat are transported outside.
  • the heat generated by the dehumidification of the air is used to reheat the air after the dehumidification.
  • the dehumidified air is heated to a temperature of approximately 15 ° C to 60 ° C. This is sufficient for drying with dry air.
  • the method according to the invention has the following advantages:
  • the housings intended for drying are adapted to the conditions of the individual case. If, for example, vehicle undercarriages of buses are to be dried, a corresponding dryer tunnel is required, through which the entire underbody of a bus can be passed.
  • a kind of drawer system can be provided for drying railway and car models, in which each model is arranged individually. The dry air is led through the individual drawers of the drawer system.
  • the process according to the invention has the advantage that drying takes much less time than with the processes belonging to the prior art.
  • the drying process takes between three and ten minutes, depending on the material and surface. In the case of very jagged parts, the time required can increase to twelve to fifteen minutes. This is because the dry air is cracked and recesses can not penetrate so well, so that there is air in these cracks and recesses, which is saturated with liquid, so that the drying process stagnates.
  • air circulation can be ensured in all cracks and recesses by means of a blower or by means of nozzles.
  • the time for air drying is around three to four minutes.
  • the time for air drying depends on the type of coating liquid used.
  • Another advantage of the method according to the invention is that only 10% to 25% of the energy expenditure of the methods belonging to the prior art is required.
  • Fig. 2 shows a drying device with an additional cooling device.
  • FIG. 1 shows a device (1) with a dewatering device (2) for a water-based lacquer layer through which moist air (3) is passed.
  • the moist air (3) is dewatered in the dewatering device (2) by condensation such that the air has a partial vapor pressure of 0 to 16 mbar.
  • the condensate (12) is collected in a basin (4).
  • the condensed air (5) is passed through a heating device (17) and by means of a fan (7) in the direction of arrow (A) in an area (8) of the device (1).
  • the dry air sweeps through circulation over workpieces (9) which are coated and are to be dried.
  • the dry air absorbs the moisture from the paint, so that the air in area (10) in turn has a higher relative humidity.
  • the moist air is fed in the direction of arrow (B) back to the dewatering device (2), where the water (3) is extracted again.
  • the air in the area (8) has a temperature of 15 ° C to 60 ° C.
  • the workpieces (9) are not significantly heated when they are swept with the dry air heated to 15 ° C to 60 ° C, since the surface of the workpieces (9) remains cold due to the evaporative cooling.
  • the device (1) forms a closed circuit for the circulating air.
  • the device (1) can also be operated with an open circuit.
  • the device (1) can be designed as a continuous system with open passage openings for the parts to be dried.
  • the device (1) has a housing (11) in which the process of dewatering the air, heating the dry air, drying the workpieces and returning the moist air to the dewatering device (2) is carried out in a closed circuit.
  • the device works in the same way for drying any kind of thin layers, be it on water. water, alcohol or other solvent base, but also when using fats or adhesives and the like.
  • the drying device (1) in a preferred embodiment of the invention has an additional cooling device (13).
  • the additional cooling device (13) a circulating refrigerant with which the dewatering device (2) is operated is cooled. This is necessary in order to maintain a low temperature level of the drainage device (2).
  • the refrigerant with which the dewatering device (2) is operated is thereby heated.
  • the heated refrigerant passes from the dewatering device (2) into a compressor (14).
  • the refrigerant is compressed in the compressor (14), as a result of which the refrigerant heats up. This further warming is based essentially on the heat of compression.
  • the compressed refrigerant passes from the compressor (14) into the refrigerant condenser (6).
  • the dry air (5) is heated to a predetermined temperature in the refrigerant condenser (6) in order then to use this heated air in the area (8) for drying the workpieces (9).
  • the refrigerant is pre-cooled by the release of thermal energy by the heated refrigerant to the dry air (5) in the refrigerant condenser (6).
  • the pre-cooled refrigerant then passes into another refrigerant condenser (15).
  • the precooled refrigerant is cooled further in the refrigerant condenser (15) with the aid of circulating air, which is removed from the surroundings of the drying device (1) by means of a fan (16).
  • the circulating air is essentially at room temperature.
  • the additional cooling device (13) the refrigerant used in the cooling circuit is always cooled in such a way that dewatering of the circulating air in the dewatering device (2) can be carried out optimally.
  • the housing (11) of the drying device (1) can be considered as not heat-insulated Housing be formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé pour sécher des pièces munies d'un revêtement, ainsi qu'un dispositif permettant de mettre ledit procédé en oeuvre. Selon le procédé, les pièces sont soumises à l'action d'air sec, en d'autres termes de l'air dont l'humidité absolue est comprise entre 0 et 10 grammes de charge en vapeur par centimètre cube.
PCT/EP1997/005650 1996-10-28 1997-10-14 Procede et dispositif pour secher des couches minces Ceased WO1998019124A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE19781220A DE19781220C1 (de) 1996-10-28 1997-10-14 Verfahren zum Trocknen von dünnen Schichten sowie Vorrichtung zur Durchführung des Verfahrens
AU51189/98A AU5118998A (en) 1996-10-28 1997-10-14 Method and device for drying thin coatings
DE19781220D DE19781220D2 (de) 1996-10-28 1997-10-14 Verfahren zum Trocknen von dünnen Schichten sowie Vorrichtung zur Durchführung des Verfahrens
DK97945828T DK0934497T3 (da) 1996-10-28 1997-10-14 Fremgangsmåde ved tørring af tynde lag og indretning til udøvelse af fremgangsmåden
AT97945828T ATE221981T1 (de) 1996-10-28 1997-10-14 Verfahren zum trocknen von dünnen schichten sowie vorrichtung zur durchführung des verfahrens
DE59707933T DE59707933D1 (de) 1996-10-28 1997-10-14 Verfahren zum trocknen von dünnen schichten sowie vorrichtung zur durchführung des verfahrens
CA002269982A CA2269982A1 (fr) 1996-10-28 1997-10-14 Procede et dispositif pour secher des couches minces
EP97945828A EP0934497B1 (fr) 1996-10-28 1997-10-14 Procede et dispositif pour secher des couches minces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19644717.8 1996-10-28
DE19644717A DE19644717A1 (de) 1996-10-28 1996-10-28 Verfahren zum Trocknen von dünnen Schichten sowie Vorrichtung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
WO1998019124A1 true WO1998019124A1 (fr) 1998-05-07

Family

ID=7810187

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/005650 Ceased WO1998019124A1 (fr) 1996-10-28 1997-10-14 Procede et dispositif pour secher des couches minces

Country Status (8)

Country Link
EP (1) EP0934497B1 (fr)
AT (1) ATE221981T1 (fr)
AU (1) AU5118998A (fr)
CA (1) CA2269982A1 (fr)
DE (3) DE19644717A1 (fr)
DK (1) DK0934497T3 (fr)
ES (1) ES2182123T3 (fr)
WO (1) WO1998019124A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106270380A (zh) * 2016-08-16 2017-01-04 东风汽车有限公司 一种泡沫塑料模型烘房
WO2017097483A1 (fr) * 2015-12-10 2017-06-15 Dürr Systems Ag Installation de traitement et procédé pour traiter des pièces
WO2018101178A1 (fr) * 2016-11-30 2018-06-07 マツダ株式会社 Procédé de séchage de revêtement et dispositif associé

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19756194B4 (de) * 1997-12-17 2006-06-08 Keld Gabelgaard Lackverarbeitungsvorrichtung und -verfahren
DE10030383C1 (de) * 2000-06-21 2001-10-04 Daimler Chrysler Ag Verfahren und Vorrichtung zum nicht-thermischen Trocknen von mit einem Wasserbasislack frisch lackierten Gegenständen, insbesondere Kraftfahrzeugkarosserien
DE10128794B4 (de) * 2001-06-15 2005-02-17 Rehau Ag + Co. Verfahren und Einrichtung zum Trocknen
EP2211918B1 (fr) * 2007-10-29 2017-10-18 Syneron Medical Ltd. Séchage vertical de timbres transdermiques
EP2219438A4 (fr) 2007-12-10 2014-04-23 Oliveira Junior Jose Vilani Unité de déshumidification ou de déshydratation utilisable en apiculture

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366363A1 (fr) * 1975-06-19 1978-04-28 Cominter Sa Procede de sechage des cuirs et peaux et installation permettant sa mise en oeuvre
EP0044898A1 (fr) * 1980-07-30 1982-02-03 C.C.E. s.r.l. Commissionaria Costruzioni Elettroniche Procédé et dispositif pour le séchage rapide, en particulier de peaux
US4365480A (en) * 1978-09-05 1982-12-28 United Air Specialists, Inc. Process gas treating apparatus
DE3229903A1 (de) * 1982-08-11 1984-02-16 Mohndruck Graphische Betriebe GmbH, 4830 Gütersloh Verfahren und vorrichtung zum aufbereiten eines zum trocknen von loesungsmittelhaltigen farben, lacken, klebern oder dergleichen auf papier oder vergleichbaren zelluloseprodukten verwendeten trocknungsmediums
EP0266516A2 (fr) * 1986-11-05 1988-05-11 Hermann Waldner GmbH & Co. Sécheur, notamment pour l'industrie chimique
DE3734994A1 (de) * 1987-07-31 1989-02-09 Guenther Zippel Maschf Verfahren und einrichtung zum vollautomatischen trocknen von gereinigten gegenstaenden
WO1993021489A1 (fr) * 1992-04-10 1993-10-28 Khanh Dinh Procede et systeme de sechage a boucle fermee
DE9401195U1 (de) * 1994-01-25 1994-03-31 Bartel, Walter, 78054 Villingen-Schwenningen Sieb-Trockenschrank
DE29504040U1 (de) * 1995-03-10 1996-04-04 Harter Oberflächen- und Umwelttechnik GmbH, 88161 Lindenberg Industrietrockner mit verbessertem Wirkungsgrad

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366363A1 (fr) * 1975-06-19 1978-04-28 Cominter Sa Procede de sechage des cuirs et peaux et installation permettant sa mise en oeuvre
US4365480A (en) * 1978-09-05 1982-12-28 United Air Specialists, Inc. Process gas treating apparatus
EP0044898A1 (fr) * 1980-07-30 1982-02-03 C.C.E. s.r.l. Commissionaria Costruzioni Elettroniche Procédé et dispositif pour le séchage rapide, en particulier de peaux
DE3229903A1 (de) * 1982-08-11 1984-02-16 Mohndruck Graphische Betriebe GmbH, 4830 Gütersloh Verfahren und vorrichtung zum aufbereiten eines zum trocknen von loesungsmittelhaltigen farben, lacken, klebern oder dergleichen auf papier oder vergleichbaren zelluloseprodukten verwendeten trocknungsmediums
EP0266516A2 (fr) * 1986-11-05 1988-05-11 Hermann Waldner GmbH & Co. Sécheur, notamment pour l'industrie chimique
DE3734994A1 (de) * 1987-07-31 1989-02-09 Guenther Zippel Maschf Verfahren und einrichtung zum vollautomatischen trocknen von gereinigten gegenstaenden
WO1993021489A1 (fr) * 1992-04-10 1993-10-28 Khanh Dinh Procede et systeme de sechage a boucle fermee
DE9401195U1 (de) * 1994-01-25 1994-03-31 Bartel, Walter, 78054 Villingen-Schwenningen Sieb-Trockenschrank
DE29504040U1 (de) * 1995-03-10 1996-04-04 Harter Oberflächen- und Umwelttechnik GmbH, 88161 Lindenberg Industrietrockner mit verbessertem Wirkungsgrad

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017097483A1 (fr) * 2015-12-10 2017-06-15 Dürr Systems Ag Installation de traitement et procédé pour traiter des pièces
WO2017098056A1 (fr) * 2015-12-10 2017-06-15 Dürr Systems Ag Installation de traitement et procédé pour traiter des pièces
CN106270380A (zh) * 2016-08-16 2017-01-04 东风汽车有限公司 一种泡沫塑料模型烘房
CN106270380B (zh) * 2016-08-16 2018-04-20 东风汽车有限公司 一种泡沫塑料模型烘房
WO2018101178A1 (fr) * 2016-11-30 2018-06-07 マツダ株式会社 Procédé de séchage de revêtement et dispositif associé
JP2018091492A (ja) * 2016-11-30 2018-06-14 マツダ株式会社 塗装乾燥方法及びその装置
US11262127B2 (en) 2016-11-30 2022-03-01 Mazda Motor Corporation Coating drying method and device therefor

Also Published As

Publication number Publication date
DK0934497T3 (da) 2002-10-07
DE59707933D1 (de) 2002-09-12
CA2269982A1 (fr) 1998-05-07
ES2182123T3 (es) 2003-03-01
DE19781220C1 (de) 2000-04-13
EP0934497A1 (fr) 1999-08-11
AU5118998A (en) 1998-05-22
DE19644717A1 (de) 1998-04-30
EP0934497B1 (fr) 2002-08-07
ATE221981T1 (de) 2002-08-15

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