EP1446236A2 - Verfahren und vorrichtung zum trocknen und/oder vernetzen einer lösemittelhaltigen beschichtung eines metallbands - Google Patents
Verfahren und vorrichtung zum trocknen und/oder vernetzen einer lösemittelhaltigen beschichtung eines metallbandsInfo
- Publication number
- EP1446236A2 EP1446236A2 EP02781203A EP02781203A EP1446236A2 EP 1446236 A2 EP1446236 A2 EP 1446236A2 EP 02781203 A EP02781203 A EP 02781203A EP 02781203 A EP02781203 A EP 02781203A EP 1446236 A2 EP1446236 A2 EP 1446236A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal strip
- coating
- drying
- solvent
- housing
- 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.)
- Withdrawn
Links
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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- B05D3/02—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 baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
-
- 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
Definitions
- the invention relates to a method for drying and / or crosslinking a solvent-containing coating of a metal strip, in which the coated metal strip is passed through a drying device in which an energy form is applied to it, which converts to heat in the coating and / or the metal strip , and in the interior of which a gas is introduced, the temperature of which is above the condensation temperature of the solvent;
- At least one source of an energy form which is arranged in the interior of the housing in the vicinity of the path of movement of the metal strip and which converts to heat in the coating and / or the metal strip;
- Coated, especially lacquered metal strips are becoming increasingly important in a wide variety of industrial areas. They can be manufactured inexpensively, can be stored cheaply wound into coils, cut to size for the desired application if required, and further processed to the desired end product.
- the heat required for drying and crosslinking is primarily generated in the metal strip with the aid of induction coils, which cause eddy currents in the metal strip. This then heats the coating from the inside to the outside by heat conduction. This has the advantage that the hottest areas of the coating are on the inside, so that the drying and crosslinking process progresses from the inside to the outside, whereby the escape of solvent is not hindered.
- the disadvantage is that the metal strip itself must be heated, which is energetically unfavorable.
- this method and device also have the disadvantage that the heat inside the coating has to propagate by heat conduction from one surface to which the heat is supplied to the opposite surface, which takes a certain amount of time.
- the object of the present invention is to design a method or a device of the type mentioned at the outset in such a way that it achieves even shorter drying and / or crosslinking times and is more energy-efficient.
- the energy form is infrared radiation.
- infrared radiation has the advantage that the heat is generated by absorption of the infrared radiation directly in the coating, namely in its volume, that is, not only in areas close to the surface.
- the infrared radiation is essentially reflected on the surface of the metal strip so that the metal strip is not directly heated; it remains if the metal strip is not prevented from being heated by thermal conduction from the coating. All of this contributes to the fact that the time required to dry and / or crosslink the coating is much shorter compared to the use of eddy currents caused by induction in the metal strip and that nevertheless considerable energy savings are made becomes.
- the wavelength of the infrared radiation is preferably between approximately 0.8 ⁇ m and 1.5 ⁇ m. This is the wavelength range in which common solvents and common coatings have favorable absorption bands for electromagnetic radiation.
- the exact wavelength of the radiation used is adapted to the absorption spectrum of the coating and solvent in such a way that the infrared radiation in the coating is absorbed as completely as possible.
- the energy source is designed to emit infrared radiation.
- the energy source is expediently designed to emit infrared radiation with a wavelength between approximately 0.8 ⁇ m and approximately 1.5 ⁇ m. Again, reference can be made to the above information on the advantages associated with the use of this wavelength range.
- the housing comprises an outer jacket and an inner jacket, the energy source being arranged in a niche in the inner jacket.
- the space between the outer jacket and the inner jacket can be used for insulation or cooling purposes.
- the arrangement of the energy source in a niche of the inner jacket, i.e. ultimately in one Interruption of the space between the outer jacket and the inner jacket enables the formation of a continuous drying tunnel within the housing.
- both sides of the metal strip are thus dried and / or cross-linked in a single pass through the drying device.
- the drying device shown has a housing identified overall by the reference number 1, which has an inlet opening 2 on its lower end face in the drawing and an outlet opening 3 on its upper end face in the drawing.
- An intermediate wall 4 within the housing 1 separates the interior thereof into a drying zone 5 adjacent to the inlet opening 2 and an evaporation zone 6 adjacent to the outlet opening 3.
- the intermediate wall 4 has a passage opening 7.
- the housing 1 comprises an outer jacket 10 and an inner jacket 11, which together delimit a space 12.
- the intermediate space 12 is flowed through in a manner not shown in the drawing of cooling air which is supplied in the vicinity of the inlet opening 2 and is removed in the vicinity of the intermediate wall 4.
- the inner jacket 11 forms a kind of "tunnel" through which the metal strip 8 to be dried moves.
- infrared radiators 14 are used on both sides of the path of movement of the metal strip.
- the infrared emitters 14 are water-cooled; the necessary water pipes are not shown in the drawing for reasons of clarity.
- the interior of the housing 1 becomes different
- Tapping points 15 the mixture located there
- Air and solvents are sucked off via a manifold 16 and fed to a thermal afterburning device, not shown in the drawing.
- a thermal afterburning device not shown in the drawing.
- each branch line which connects a tapping point 15 to the manifold 16
- the tapping points 15 are closer to each other near the inlet opening 2 of the drying device than near the outlet opening 3, since more solvent vapors develop in the vicinity of the inlet opening 2.
- the air containing solvent, which is discharged via the manifold 16, is burned in the thermal afterburning device; the exhaust gases cleaned in this way are discharged into the atmosphere.
- the thermal afterburning device fresh air, which is sucked in from the outside atmosphere, is heated via a heat exchanger and injected via a line 18 into the interior of the housing 1 near the inlet opening 2.
- the air introduced here balances the air balance in the interior of the housing 1 and has a temperature which is above the condensation temperature of the solvents, as a result of which recondensation of these solvents on colder housing parts is avoided.
- the hot air generated by the thermal afterburning device is fed via a line 19 to the outlet opening 3 of the drying device; here it essentially serves as sealing air for separating the atmosphere of the interior of the evaporation zone 6 and from that of a downstream processing station in which the dried metal strip 8 is cooled, for example.
- the drying device described works as follows:
- the metal strip 8 provided with a fresh, solvent-containing coating enters the interior of the housing 1 via the inlet opening 2.
- the cooler air entering through the inlet opening 2 comes from the
- the outside atmosphere is immediately warmed to a temperature by the hot air supplied via line 18, which prevents solvents from recondensing.
- the metal strip 8 now moves successively towards the various infrared radiators 14, which irradiate the opposite surfaces of the metal strip 8.
- the IR radiation first penetrates the coating from the outside inwards, is reflected on the metallic surface of the metal strip 8 and then passes through the coating a second time.
- the wavelength of the IR radiation is matched to the material of the coating in such a way that, if possible, all of the IR radiation is completely absorbed when it passes through the coating twice, so that as little IR radiation as possible emerges from the coating after reflection.
- the correct wavelength can therefore be determined from the absorption bands of the coating material.
- the solvent is expelled very quickly over a very short distance that the metal strip 8 must cover for this purpose.
- the developing solvent vapors are sucked off in particular in the entrance area of the drying zone 5 via the extraction points 15 located there and fed to the afterburning via the collecting line 16.
- the completely dried metal strip 8 leaves the housing 1 of the drying device with a cross-linked coating through the hot sealing air in the outlet opening 3 and can then be cooled and wound up.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Textile Engineering (AREA)
- Wood Science & Technology (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001158008 DE10158008A1 (de) | 2001-11-22 | 2001-11-22 | Verfahren und Vorrichtung zum Trocknen und/oder Vernetzen einer lösemittelhaltigen Beschichtung eines Metallbands |
DE10158008 | 2001-11-22 | ||
PCT/EP2002/011031 WO2003043746A2 (de) | 2001-11-22 | 2002-10-02 | Verfahren und vorrichtung zum trocknen und/oder vernetzen einer lösemittelhaltigen beschichtung eines metallbands |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1446236A2 true EP1446236A2 (de) | 2004-08-18 |
Family
ID=7707034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02781203A Withdrawn EP1446236A2 (de) | 2001-11-22 | 2002-10-02 | Verfahren und vorrichtung zum trocknen und/oder vernetzen einer lösemittelhaltigen beschichtung eines metallbands |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1446236A2 (de) |
DE (1) | DE10158008A1 (de) |
WO (1) | WO2003043746A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10245004A1 (de) * | 2002-09-26 | 2004-04-29 | Advanced Photonics Technologies Ag | Verfahren und Anordnung zur thermischen Behandlung eines Werkstücks |
DE20304641U1 (de) * | 2003-03-21 | 2003-05-22 | Josef Schiele oHG, 56651 Niederzissen | Beschichtungsvorrichtung |
DE102004059903B4 (de) | 2004-12-13 | 2013-02-07 | Adphos Advanced Photonics Technologies Ag | Verfahren und Anlage zum Beschichten eines Matallbands mit einer lösemittelhaltigen Beschichtung und zum Trocknen und/oder Vernetzen derselben |
EP1790928A1 (de) * | 2005-11-25 | 2007-05-30 | Advanced Photonics Technologies AG | Bandbeschichtungsverfahren und Vorrichtung dafür |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH276118A (de) * | 1948-11-08 | 1951-06-30 | Haas Jun Hermann | Einrichtung zum Trocknen von Materialbahnen. |
DE8817120U1 (de) * | 1988-04-07 | 1993-02-04 | Vits Maschinenbau Gmbh, 4018 Langenfeld | Vorrichtung zur Wärmebehandlung und/oder Trocknung einer Materialbahn |
KR20000011746A (ko) * | 1998-07-17 | 2000-02-25 | 미야무라 심뻬이 | 동박의건조방법및동박건조장치 |
-
2001
- 2001-11-22 DE DE2001158008 patent/DE10158008A1/de not_active Ceased
-
2002
- 2002-10-02 EP EP02781203A patent/EP1446236A2/de not_active Withdrawn
- 2002-10-02 WO PCT/EP2002/011031 patent/WO2003043746A2/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03043746A3 * |
Also Published As
Publication number | Publication date |
---|---|
DE10158008A1 (de) | 2003-06-05 |
WO2003043746A3 (de) | 2004-03-04 |
WO2003043746A2 (de) | 2003-05-30 |
WO2003043746A8 (de) | 2004-05-21 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20040430 |
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AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
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17Q | First examination report despatched |
Effective date: 20040816 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LINK, KERSTEN Inventor name: DIBON, ANDREAS |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: EISENMANN MASCHINENBAU GMBH & CO. KG |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20041228 |