EP1372867A1 - Method for applying a coating agent - Google Patents
Method for applying a coating agentInfo
- Publication number
- EP1372867A1 EP1372867A1 EP02706785A EP02706785A EP1372867A1 EP 1372867 A1 EP1372867 A1 EP 1372867A1 EP 02706785 A EP02706785 A EP 02706785A EP 02706785 A EP02706785 A EP 02706785A EP 1372867 A1 EP1372867 A1 EP 1372867A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating agent
- gas mixture
- volume space
- coating
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
-
- 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
-
- 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
-
- 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
- B05B7/0012—Apparatus for achieving spraying before discharge from the apparatus
Definitions
- the invention relates to a method for applying a coating agent to the surface of a workpiece.
- the invention further relates to a device for performing the method.
- a coating agent is understood to mean a wet-chemical coating material, in particular a lacquer.
- Lacquers as such are known from the prior art in a variety of configurations. They are usually applied in a thin layer to the surface of a workpiece and, through a chemical reaction and / or physical change, form a solid film that adheres to the surface of the workpiece and, depending on the application, has a decorative and / or protective function.
- the main components of a paint are usually binders, solvents, pigments, fillers and other additives, such as paint aids.
- lacquers can contain organic solvents and / or water or be solvent-free.
- varnishing The application of a varnish to the surface of a workpiece is referred to as varnishing and can take place depending on the surface of the workpiece, the varnish to be applied and the desired properties of the later varnish layer using a wide variety of methods. For example, by painting with a brush, by spraying with the help of spraying devices or by flooding, dipping, pouring or rolling. Coating can also be used to coat metal strips or sheets Stoving lacquers are carried out, in the case of powder coating by electrostatic coating or sintering in the fluidized bed, and finally by the electrophoretic lacquering frequently used in particular in the automotive industry.
- Smooth layers of paint can be formed in particular using the immersion method.
- the thickness of the smeared layer primarily depends on the viscosity and rheology of the lacquer and the speed at which the workpiece is pulled out of the immersion bath. It is disadvantageous, however, that an unavoidable build-up of paint occurs in the dripping area of the workpiece, which generally results in an undesired thickening of the paint layer in this area. It should also be borne in mind that the entire workpiece is wetted by the dipping process. This is always a disadvantage if not the entire workpiece, but only partial areas of it, are to be provided with a lacquer layer.
- the spraying method is particularly suitable for the targeted painting of selected workpiece surface areas.
- a spray cone is generated, which is directed to the surface to be coated with a compressed air pressure that can usually be predetermined. In this way, only partial areas of a workpiece surface can be coated, i.e. be painted.
- the spray process has established itself in many areas because of the aforementioned advantage, regardless of whether a protective or decorative surface coating is to be formed with the paint, the paint layers which can be produced by the spray process also have a largely considerable strength.
- the lacquer layer thicknesses which can be achieved with conventional methods are very large. This fact is particularly noticeable in the case of transparent coating systems, because it is the structural change caused by the application of a coating Workpiece surface often perceived by the viewer as high-gloss and "greasy". Also, the appearance of orange peel effects cannot always be completely avoided. Such effects are also perceived as unattractive by the viewer and often lead to complaints.
- the invention is intended to propose a device for carrying out the method.
- the invention proposes a method for applying a coating agent to the surface of a workpiece, in which the coating agent is mixed in a finely divided manner in a gas stream, the coating agent-gas mixture into an atmosphere opposite the surrounding atmosphere sealed volume space is guided and a workpiece arranged within the volume space is washed around by the coating agent-gas mixture.
- a major advantage of this method is that, depending on the particle diameter of the finely divided coating agent, layer thicknesses can also be formed whose thickness is below the wavelength of the light and thus any structural changes or undesired surface effects are invisible to the human eye and therefore imperceptible.
- the coating agent to be applied is finely divided into particles with a particle diameter of 10 "8 m to 10 " 6 m.
- the particles are then mixed into a gas stream so that an aerosol consisting of carrier gas and coating agent suspended particles is formed. This is led into a volume space that is sealed off from the surrounding atmosphere. This is the case within the volume space Arranged workpiece having a coating surface, which is now exposed to the aerosol atmosphere.
- Floating particles of the coating agent hit the surface of the workpiece and wet it, so that depending on the density of the coating agent-gas mixture and the dwell time of the workpiece within this atmosphere, a closed surface coating is achieved, the layer thickness of which corresponds to the particle diameter of the coating agent in a few 10 nm range, preferably a few 100 nm range.
- the formation of a closed surface coating can additionally be supported by an electrical or electrostatic charging of the coating agent particles and / or the workpiece to be coated.
- transparent coating compositions can thus be applied for the first time in an ambient atmosphere in such thin layer thicknesses that they can no longer be perceived as such by humans.
- the surface properties of workpieces can be specifically changed. For example, surfaces of everyday objects can be covered with a colorless protective layer, so that later cleaning of the object, for example wiping fingerprints, can be done much more easily and quickly.
- the surface of black plastic parts such as the surface of car fittings, or the surface of shiny metallic or matt, for example chrome-plated surfaces, can be maintained and cleaned much more easily owing to a sealant which has been produced using the method according to the invention.
- a coating agent-gas mixture according to the invention are produced by mechanical atomization of fine powders, by condensation of vapors when cooling below the dew or freezing point, by combustion processes or spraying of solutions or mixed solutions, sols, emulsions or suspensions, the solvents or dispersants evaporating immediately. If the finely divided coating agent particles are solids, the coating agent / gas mixture is either smoke or dust, depending on the type of formation. Fog occurs in the case of liquid coating agent particles.
- the method according to the invention is suitable for coating a wide variety of flat or three-dimensional workpieces. These can consist of plastic, metal, glass, ceramics, fiber products, textiles, polymers, stone, sandstone or concrete. Particularly good results can be achieved with materials which have reactive groups (e.g. hydroxyl or amino groups) on their surface. These include, for example, glass or ceramic surfaces.
- the method can also be used for metals, in particular for aluminum, brass and chrome, but is also particularly suitable for galvanically treated surfaces. The adherence of the coating agent to the surface of the workpiece is improved with increasing surface tension of the workpiece. Examples of workpieces that can be coated with the method according to the invention are fittings, solar panels, glass covers, facades, decorative panels, display windows, car sheets, printing machine sheets, metal foils and nozzles.
- the workpiece preferably has room temperature, but can also be introduced cooled or heated into the volume space in order to achieve a temperature difference between the workpiece and the coating agent located in the volume space.
- Coating agents are those based on silanes, in particular organosilanes.
- Organosilanes are bifunctional silicon compounds that can be used in lacquers and paints as adhesion promoters between the surface and the coating or as crosslinkers.
- Organosilanes can also act as a co-binder as oligomers in hybrid coatings.
- Suitable organosilanes are, in particular, organofunctional silanes and alkylsilanes. These are derived from silicic acid esters, with one or two alkoxy groups of the silicic acid ester being replaced by directly bonded alkyl or functionalized alkyl radicals.
- Organofunctional silanes and alkylsilanes thereby obtain a bifunctionality which allows them to react with both organic and inorganic materials or to modify organophilically via their alkyl radical of organic materials.
- Organosilanes preferably used according to the invention are preferably in the form of a liquid with a low viscosity.
- the reaction behavior of the organosilanes is particularly advantageous, the silicon-functional group being able to hydrolyze in the presence of water or through surface moisture of substrates (for example glass, metal, fillers or pigments).
- the alkoxy groups are split off gradually to form alcohol and the silane is converted into the reactive form, the silanol.
- the silanol formed can then be fixed via a chemical bond on the surface of inorganic substrates.
- the coating compositions preferably used in the process according to the invention can also contain further constituents such as resins or inorganic compounds such as aluminum oxides (eg Al 2 O 3 ) or titanium oxide. It is also possible to modify the organofunctional silanes in such a way that one or more silicon atoms are replaced by metal atoms. As a result, the properties of the layer system to be achieved can be specifically changed and adapted to the respective requirements.
- the composition of the coating agent for example, the following properties of the coated workpiece can be achieved: - chemically inert, abrasion, scratch and wear resistant;
- the composition of the coating agent-gas mixture must be taken into account when choosing the way in which the coating agent-gas mixture is brought into contact with the workpiece. It has been shown that essentially three coating effects can be observed. Firstly, a condensation effect in which the aerosol washes around the workpiece and condenses like a mist on the surface of the object. The condensation effect essentially occurs with smaller particle sizes of the coating agent mixed into the carrier gas. There is also a gravitational effect, in which larger particles are accelerated downwards due to gravity and coat workpieces, especially from above. Finally, a kinetic effect can be observed, in which the particles move through the kinetic energy and hit the surface of the object and adhere to it.
- the way in which the coating agent-gas mixture is brought into contact with the workpiece should be matched to the coating effect which is in the foreground. This is preferably done by measures which ensure that each surface section of the workpiece comes into contact with all particles of different diameters. This is done primarily through measures that bring about an even distribution of all particle sizes in the part of the volume space in which the workpiece is located.
- the spectrum of particle sizes can be influenced in particular by the choice of temperature and pressure. Higher temperatures and lower viscosities result in a spectrum with smaller particles. The condensation effect can thus be supported.
- the average particle diameter based on the mass of the particles should be 800 nm to 6 ⁇ m, in particular 1 to 3 ⁇ m.
- the dominance of a coating effect can be brought about if a temperature gradient between the workpiece and the volume space is set. This can be generated in a simple manner by introducing the workpiece into the volume space in a heated or cooled manner.
- the coating process is preferably carried out under essentially atmospheric pressure. This leads to a good adherence of the coating agent to the workpiece.
- the coating agent-gas mixture is blown into the volume space.
- This enables the introduction of a coating agent / gas mixture which has already been premixed and the composition of which is matched to the specific individual case.
- an increased movement of the individual floating particles can be achieved by blowing in, so that an overall more uniform distribution of the coating agent particles is established within the volume space. This advantageously causes the formation of a more uniform, i.e. especially a more uniform thin coating layer.
- the coating agent-gas mixture is circulated within the volume space.
- This measure also advantageously distributes the coating agent-gas mixture uniformly in the volume space, so that an equally uniform coating is ensured.
- the larger the diameter of the coating agent particles the more they strive to settle towards the bottom of the volume space. Circulation of the coating agent-gas mixture thus takes place not only as a function of the density of the mixture, but also as a function of the diameter of the particles, the need for circulation increasing with increasing particle diameter.
- the coating agent / gas mixture is conducted in a closed circuit.
- driving in a closed circuit is advantageous. For example, it can be ensured in this way that the coating agent or particles of these are not released into the environment unintentionally.
- cleaning systems can be installed in a simpler manner, which enable the coating agent itself and the carrier gas to be reprocessed
- the coating agent-gas mixture is introduced under pressure into the volume space via at least one supply line and the resulting coating agent-gas mixture jet circulates the coating agent-gas mixture within the volume space.
- the coating agent-gas mixture jet is directed onto an inner surface of the volume space.
- the jet can advantageously circulate and distribute the coating agent-gas mixture over a wide area. so the beam can be deflected along the inner surface, so that a ball-filling vortex is created. This ensures an optimal coating
- two coating agent-gas mixture jets flow in opposite directions.
- the at least one coating agent-gas mixture jet enters the volume space in a direction inclined to the horizontal.
- this offers advantageous possibilities for determining the circulation of the coating agent / gas mixture. This means that areas close to the floor and ceiling can be supplied with the necessary particle density.
- a coating agent-gas mixture jet is introduced in a direction inclined upwards to the horizontal and a second coating agent-gas mixture jet is introduced in a direction inclined downwards to the horizontal.
- the workpieces are positioned within the volume space by means of a frame become.
- the workpieces can already be suitably fixed outside the volume space and positioned with the frame in the volume space. This firstly ensures that the workpieces are positioned and removed safely from the volume space, and secondly that a suitable frame design can be selected in order to achieve an optimal circulation of the coating agent-gas mixture.
- the workpieces are moved in the volume space, preferably rotated on a frame about one or more axes.
- this leads to all surfaces of a flat or three-dimensional workpiece being brought into an "upward" position at least once during the coating. Since the coating in the gravitational effect is essentially achieved in that heavy drops, due to gravity, hit surfaces pointing "upwards" from above, the aforementioned movement of the workpieces leads to a uniform coating of all surfaces. Movement is not required for coating processes in which the condensation effect is paramount. Nevertheless, movement of the workpiece can also be provided in these methods.
- the temperature of the coating agent is set to a temperature of 15 to 23 ° C. This leads to an intensification of the gravitational effect, which is particularly advantageous if the workpiece is moved in the volume space in the manner described immediately above.
- the temperature of the coating agent is set at 22 to 40 ° C, preferably 35 to 40 ° C. This reduces the particle size of the coating agent and the condensation effect supported. This means that even in volume spaces in which the workpieces are not moved, they can be coated well.
- the coating agent-gas mixture is conveyed into the volume space via a feed line depending on a predefinable function and, after flowing through the volume space, is drawn off via an exhaust gas line.
- a feed line depending on a predefinable function
- an exhaust gas line is drawn off via an exhaust gas line.
- the coating agent-gas mixture is filtered after being extracted from the volume space. This ensures that particles do not get into the environment unintentionally.
- an activated carbon filter is preferred.
- the density of the coating agent-gas mixture is recorded in the volume space and readjusted to set a predeterminable value if necessary. Maintaining a predetermined density is of decisive importance for the coating quality that can be achieved with the method according to the invention, in that the mixture density, which is dependent on the functional ratio to the dwell time of the workpiece in the volume space, has a decisive influence on the layer thickness that forms per unit of time. Although this dependency can be varied by additional circulating movements of the coating agent-gas mixture in the volume space, the density of the mixture in particular is a preferred measure for determining how many coating agent particles are contained in the gas per part by volume.
- the density of the coating agent / gas mixture is preferably detected optically. This kind detection is easy to perform and reliable.
- the coating agent is mixed into the gas stream in liquid and / or solid form.
- the coating agent-gas mixture either smoke or dust is present; there is fog in the case of liquid coating agent particles.
- an inert gas preferably nitrogen
- an inert gas is used to form the coating agent-gas mixture.
- the sensitivity of some coating compositions to, for example, moisture contained in the ambient air can thus be taken into account and undesired reactions can thus be prevented. In this way, no explosive mixtures can form.
- dry air can also be used as a coating agent-gas mixture if the coating chamber is designed to be explosion-proof.
- the invention proposes a device for carrying out the method described above, characterized by a volume space, a feed and a discharge line for the coating agent-gas mixture and a circulating device.
- a coating agent gas atmosphere is created within the volume space.
- the workpiece to be coated is then arranged within the volume space, preferably immersed in the atmosphere and washed around by the gas carrying the coating agent particles.
- the coating agent-gas mixture in the volume space must be circulated so that a uniform distribution of the coating agent particles over the entire volume space is established.
- the device according to the invention has a corresponding circulation device.
- the device according to the invention has corresponding feed and discharge lines for feeding or discharging the coating agent / gas mixture.
- the device according to the invention provides an easy-to-use, economical to operate and also meets large industrial requirements device for carrying out the method described above.
- the circulating device has a ventilation fan.
- the ventilation fan is an easy-to-use, less cost-intensive component and an easy-to-replace component in the event of a repair.
- the volume space is subdivided into a coating space, a first chamber and a second chamber, the coating space and the first chamber as well as the first chamber and the second chamber each being in fluid communication.
- the purpose of this division is to optimize circulation.
- the fan which is arranged between the first and the second chamber, creates a in the second chamber Vacuum. This ensures that the coating agent-gas mixture is circulated from one chamber into the other chamber and from there into the coating space.
- transverse circulation is preferably also ensured by additional fluidic connections.
- the fluidic connection takes place in each case by means of slit-like openings.
- This type of fluidic connection is comparatively easy to implement and, depending on the orientation of the openings, enables almost complete mixing, i.e. Circulation of the coating agent-gas mixture.
- Coating agent-gas mixture in the volume space circulating coating agent-gas mixture jet can be introduced.
- a plurality of supply lines are attached to the volume space, from which oppositely directed coating agent-gas-mixture jets can be introduced into the volume space.
- a plurality of supply lines are attached to the volume space, from each of which at least one coating agent-gas mixture jet can be introduced inclined to the horizontal.
- a plurality of supply lines are attached to the volume space, wherein a coating agent-gas mixture jet can be introduced inclined upwards to the horizontal and a second coating agent-gas mixture jet can be introduced inclined downwards to the horizontal.
- the feed line is mounted in the side walls. The advantage of this arrangement is the simple attachment of the feed lines. The supply lines would have to be moved in the lid when opening the volume space, which can be avoided by the device according to the invention. The floor is also unsuitable for supply lines due to its difficult access.
- the feed line for the coating agent-gas mixture is so short that the separation of the coating agent-gas mixture is essentially prevented.
- a frame for receiving and positioning the workpieces is located in the volume space.
- a rotating device is provided for the frame, which enables the workpieces on the frame to be rotated about one or more axes.
- the feed line is arranged above the workpiece, in particular at a considerable distance from the workpiece, so that the particles participating in the gravitational effect can be distributed well over the horizontal cross section of the volume space before they strike the workpiece.
- the coating space has the shape of a rotating body. This has the advantage that a vortex filling the volume space is easily formed since the coating agent-gas mixture jets are deflected by the walls with little energy loss.
- a storage container for the coating agent / gas mixture which is connected to the supply line in terms of flow technology.
- the desired amount of coating agent / gas mixture can advantageously be dispensed from this storage container as required.
- Another advantage of such a storage container is that pressure and particle equalization of the coating agent-gas mixture already occurs within the storage container, with the result that the coating agent-gas mixture leaving the storage container via the supply line and flowing into the volume space always at least has approximately the same density.
- a filter preferably an activated carbon filter or also a liquid filter, is arranged interchangeably within the discharge line. In this way, particles that must not get into the environment can be filtered out of the system in a simple and efficient manner and disposed of or recovered.
- an optical measuring device for detecting the density of the coating agent-gas mixture located in the volume space.
- a control device can be provided which measures the density of the coating agent-gas mixture in the volume space with the measuring device and emits a signal corresponding to the density, which compares this signal with a predeterminable density value using a comparison circuit and, if necessary, causes a change in density. This enables the process to be carried out continuously at all times reproducible coating results.
- FIG. 2 shows a perspective illustration of a device according to the invention for carrying out the method with two feed lines, which works without a separate circulating device.
- FIG 3 shows a perspective view of a device according to the invention for carrying out the method with a rotating device for a frame for receiving the workpieces.
- volume space 1 shows a volume space 1 delimited by side walls 2, a bottom 3 and a cover 4.
- the volume space 1 is sealed off from the atmosphere surrounding it.
- the volume space is subdivided into a coating space 5, a first chamber 6 and a second chamber 7.
- the coating space 5 and the first chamber 6 as well as the first chamber 6 and the second chamber 7 are each in fluid communication.
- the first chamber 6 is in turn divided into two outer regions 8 and 9 and a central region 10.
- the central region 10 of the first chamber 6 is in fluidic connection with the second chamber 7 via a fan 11.
- slit-like openings 12 and 13 are provided between the processing space 5 and the first chamber 6 and 19 and 20 between the first and second chambers 6 and 7.
- the fan 11 blows from the second chamber 7 into the first chamber 6, specifically into the central region 10 of the first chamber 6.
- a corresponding supply line 16 and a discharge line 17 are provided for the supply or discharge of a coating agent / gas mixture.
- a reservoir for the coating agent-gas mixture that is connected to the supply line in terms of flow technology is designated by 18. The desired amount of coating agent-gas mixture can be dispensed from this storage container 18 as required.
- finely divided coating agents are provided, which are conveyed into the volume space 1 by means of a gas flow and which preferably wash around a workpiece immersed in the atmosphere prevailing in the coating space 5.
- a layer thickness is formed on the workpiece which is below the wavelength of visible light. Any structural changes or undesired surface effects are therefore invisible to the human eye and therefore imperceptible.
- the feed line 16 and the openings 14 and 15 are aligned in such a way that the coating agent-gas-mixture jets prefer extensive circulation in the coating space 5.
- the coating agent to be applied is divided into particles with a
- Particle diameters from 10 "8 m to 10 " 6 m finely distributed The particles are then mixed into a gas stream so that an aerosol consisting of carrier gas and coating agent suspended particles is formed. This is led into the volume space 1, which is sealed off from the surrounding atmosphere. Floating particles of the coating agent hit and wet the surface of the workpiece arranged within the coating space 5 and not shown in this figure, so that, depending on the density of the coating agent-gas mixture and the dwell time of the workpiece within this atmosphere, a closed surface coating is achieved whose layer thickness corresponds to the particle diameter of the coating agent in the nm range.
- volume space 21 delimited by a side wall 23, a bottom 22 and a cover 24.
- the volume space 21 is sealed off from the atmosphere surrounding it.
- the entire volume space 21 is simultaneously the coating space.
- the side walls 23 there are two feed lines 25 and 26 through which the coating agent-gas mixture flows.
- the feed lines 25 and 26 are arranged so that they are on the opposite side.
- the feed line 26 is inclined downwards to the horizontal and points to the front part of the side wall 23.
- the feed line 25 is inclined upwards to the horizontal and points to the rear part of the side wall 23.
- the feed line 26 is located somewhat higher in the side wall 23 than the feed line 25.
- the feed lines 25 and 26 are aligned such that the coating agent-gas-mixture jets emerging from them are oriented in opposite directions and extensive circulation is achieved in the volume space. Because of the alignment of the feed lines 25 and 26 on the side wall 23 it is ensured that the emerging rays are deflected and generate a wide swirl along the side wall 23 around the vertical central axis of the volume space 21.
- a reservoir for the coating agent-gas mixture connected to the supply lines 25 and 26 in terms of flow technology can deliver the desired amount of coating agent-gas mixture as required.
- the coating agent-gas mixture is pressed under pressure into the volume space 21 in order to have the corresponding speed, which ensures a sufficient circulation of the coating agent-gas mixture.
- the cover 24 of the volume space 21 is designed as a bell, in which a discharge line 27 is connected, in which a valve 28 for controlling the emerging coating agent-gas mixture is located.
- Racks and supports 29 for positioning the workpieces to be coated are located within the volume space 21. The frames and supports 29 are fastened in the cover 24.
- FIG. 3 shows a volume space 1 with a feed line 30 and a discharge line 31 as well as a cover (not shown in more detail) for opening the volume space 1.
- a frame 32 is arranged in the volume space 1 and has receptacles 33 for workpieces 34.
- the receptacles 33 are arranged on mounting rods 35 which are fastened on turntables 36. At least one turntable 36 and possibly the mounting rods 35 are connected to a rotating device, not shown.
- the turntable 36 and the mounting rods 35 are rotated by the rotating device in the directions indicated by arrows in the drawing. Thereby, the workpieces 34 are rotated in the volume space 1, so that a good coating of the workpiece with coating agent, the volume space 1 is supplied via the feed line 30 as a coating agent-gas mixture.
- An atmospheric pressure is maintained in the volume space 1 by withdrawing a corresponding amount of the coating agent-gas mixture from the volume space 1 via the discharge line 31.
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02706785A EP1372867B1 (en) | 2001-03-26 | 2002-03-25 | Method for applying a coating agent |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01106490 | 2001-03-26 | ||
EP01106490A EP1250965A1 (en) | 2001-03-26 | 2001-03-26 | Method for applying a coating |
DE20113006U | 2001-08-04 | ||
DE20113006U DE20113006U1 (en) | 2001-03-26 | 2001-08-04 | Device for applying a coating agent |
PCT/EP2002/003350 WO2002076628A1 (en) | 2001-03-26 | 2002-03-25 | Method for applying a coating agent |
EP02706785A EP1372867B1 (en) | 2001-03-26 | 2002-03-25 | Method for applying a coating agent |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1372867A1 true EP1372867A1 (en) | 2004-01-02 |
EP1372867B1 EP1372867B1 (en) | 2006-08-23 |
Family
ID=8176791
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01106490A Withdrawn EP1250965A1 (en) | 2001-03-26 | 2001-03-26 | Method for applying a coating |
EP02706785A Expired - Lifetime EP1372867B1 (en) | 2001-03-26 | 2002-03-25 | Method for applying a coating agent |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01106490A Withdrawn EP1250965A1 (en) | 2001-03-26 | 2001-03-26 | Method for applying a coating |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP1250965A1 (en) |
AT (1) | ATE337103T1 (en) |
DE (1) | DE20113006U1 (en) |
WO (1) | WO2002076628A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006011391B4 (en) * | 2006-03-09 | 2008-12-11 | Glatt Gmbh | Systems with coated spray nozzles and their use |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4389234A (en) * | 1982-03-18 | 1983-06-21 | M&T Chemicals Inc. | Glass coating hood and method of spray coating glassware |
JPS61249567A (en) * | 1985-04-30 | 1986-11-06 | Tokyo Copal Kagaku Kk | Method and apparatus for coating coating liquid such as sizing agent |
DE3727632C1 (en) * | 1987-08-19 | 1988-11-24 | Goldschmidt Ag Th | Method and device for coating thin-walled or small-format glass containers |
-
2001
- 2001-03-26 EP EP01106490A patent/EP1250965A1/en not_active Withdrawn
- 2001-08-04 DE DE20113006U patent/DE20113006U1/en not_active Expired - Lifetime
-
2002
- 2002-03-25 AT AT02706785T patent/ATE337103T1/en not_active IP Right Cessation
- 2002-03-25 WO PCT/EP2002/003350 patent/WO2002076628A1/en active IP Right Grant
- 2002-03-25 EP EP02706785A patent/EP1372867B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02076628A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1250965A1 (en) | 2002-10-23 |
EP1372867B1 (en) | 2006-08-23 |
ATE337103T1 (en) | 2006-09-15 |
WO2002076628A1 (en) | 2002-10-03 |
DE20113006U1 (en) | 2001-10-18 |
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