EP1725341B1 - Poste d'application de poudre et systeme pour appliquer un revetement sur des materiaux sensibles a la temperature et procede associe - Google Patents

Poste d'application de poudre et systeme pour appliquer un revetement sur des materiaux sensibles a la temperature et procede associe Download PDF

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Publication number
EP1725341B1
EP1725341B1 EP05845527A EP05845527A EP1725341B1 EP 1725341 B1 EP1725341 B1 EP 1725341B1 EP 05845527 A EP05845527 A EP 05845527A EP 05845527 A EP05845527 A EP 05845527A EP 1725341 B1 EP1725341 B1 EP 1725341B1
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EP
European Patent Office
Prior art keywords
fact
accordance
powder
arrangement
processing station
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.)
Not-in-force
Application number
EP05845527A
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German (de)
English (en)
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EP1725341A2 (fr
Inventor
Gerhard Brendel
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.)
TGC Technologie- Beteiligungsgesellschaft mbH
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TGC Technologie- Beteiligungsgesellschaft mbH
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Publication date
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Priority to EP10184168A priority Critical patent/EP2283933A3/fr
Priority to PL05845527T priority patent/PL1725341T3/pl
Publication of EP1725341A2 publication Critical patent/EP1725341A2/fr
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Publication of EP1725341B1 publication Critical patent/EP1725341B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/003—Handling, e.g. loading or unloading arrangements for articles
    • F26B25/004—Handling, e.g. loading or unloading arrangements for articles in the shape of discrete sheets
    • 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
    • B05D3/0209—Multistage baking
    • 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
    • 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
    • B05D7/06—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 wood
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • 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
    • 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
    • B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
    • B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
    • B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
    • 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
    • B05D3/0272—After-treatment with ovens
    • 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

Definitions

  • the present invention relates to a processing station according to the preamble of claim 1, an arrangement to powder coating according to the preamble of claim 11, and a method for powder coating according to the preamble of claim 23.
  • the powder coating or the powder coating has the advantage that various operations such as application of primers (primers), filling layers, etc., and associated intermediate processing steps such as grinding u. Like. Can be dispensed with and also an extremely attractive and smooth, can be provided with many effects surface can be created.
  • powder coating requires high temperatures for melting and curing or crosslinking of the powder. Usually, temperatures of over 120 ° C up to 200 ° C must be achieved. However, these temperatures are too high for temperature-sensitive substrates, such as wood-based materials or wood fiber (MDF), as they can lead to evaporation of moisture in the wood and thus cause cracking.
  • MDF wood fiber
  • a radiation device is provided with energy, in particular heat radiators, preferably short-wave infrared (IR) radiators or ultraviolet (UV) radiators, in which the energy radiators are arranged on a support and together are movable with the carrier or per se and / or arranged in a kind of circular or annular shape.
  • IR infrared
  • UV ultraviolet
  • the radiators can be arranged in a circle or in a circle, since this shape also ensures a uniform, in particular repeated, but not too long exposure to radiation for substrates of various shapes, but in particular plate-shaped substrates which are moved past the radiators.
  • the radiators are arranged so that they project beyond the substrate in at least one direction in order to reach all surfaces of the substrate with the radiation.
  • the radiators are preferably also arranged adjustable on the support in such a way that they can be aligned with the object to be irradiated with its main beam direction.
  • mounting elements have proven that on a support base structure, for. B. in ring, plate or disc shape are arranged pivotably and preferably about an axis which lies in the plane of the support base structure, so that the fixed to the mounting elements radiator can be swung out of the carrier ground plane and the main radiation direction of the radiator different from the normal the carrier basic level becomes.
  • the short-wave or medium-wave infrared emitters which are preferably used for the purpose of use may be designed in particular as linear emitters in segmented arrangement or as annular or circular emitters. Accordingly, only one radiator for a one-sided irradiation or two or more radiators for one- and two-sided irradiation can be provided on the radiation device. Preference is given to simultaneous two-sided irradiation, in which in each case a carrier base structure with the radiator arranged thereon or the radiators are arranged opposite to one another and enclose between them the transport path for the object to be coated.
  • the distance between the two opposing support base structures with the radiators arranged thereon can also be changed so as to be able to adjust the radiation power introduced into the surface by changing the distance.
  • UV emitters In addition to the already mentioned infrared heaters all other possible energy emitters, especially UV emitters can be placed on your radiation device.
  • An arrangement according to the invention for powder coating of temperature-sensitive materials with the radiation device described above comprises according to a further aspect an upstream powder application station and a downstream area for curing or crosslinking the powder, preferably a furnace and in particular a circulating air oven.
  • the radiation device according to the invention also in the downstream curing and crosslinking range, especially in UV-curing coating systems.
  • a corresponding arrangement comprises, for example, one or more radiation devices with IR radiators between the powder application station and the curing or crosslinking region and one or more radiation devices with UV radiators in or after the curing or crosslinking region.
  • a combination of different energy sources is possible.
  • the powder application station in which preferably the powder to be coated is deposited on the substrate by electrostatic spraying, has according to the invention so-called diverting elements which serve to dissipate charge and to smooth the field line course on the object to be coated, so that at the edges of the object, to which it usually comes to field concentrations, no accumulation of the powder to be coated takes place.
  • the diverting elements are arranged so that between you and an opposing spraying device, the object is arranged during powder application, so the diverter is from the perspective of the spraying device or powder applicator behind the object to be coated.
  • the diverting elements are preferably designed in the form of perforated plates, lamella curtains, protective plates or grid structures.
  • a device is preferably provided with which the diverting elements can be cleaned in a simple manner, for example by shaking off the powder.
  • the suspension or storage of the substrates to be coated in the powder application station via holding element, in particular hooks, which are on the one hand electrically conductive for the discharge of charge, but on the other hand in areas where they are not in direct contact with the substrates isolated, to avoid field line concentrations and accumulations of powder.
  • the area provided in the arrangement according to the invention for powder coating of temperature-sensitive substrates for curing and crosslinking of the powder adjoins advantageously directly to the radiation device in order to suffer no heat loss between the melting of the powder and the subsequent temperature treatment during curing and crosslinking.
  • the radiation device can also be integrated in the input area for the curing / crosslinking area.
  • the curing / crosslinking area is formed by a convection oven, in which the air duct either from top to bottom, from bottom to top, both from bottom to top and from top to bottom with lateral routing of the air and / or can be performed with alternating air flow from bottom to top.
  • the circulating air oven with a high air velocity in the range of 1 to 5 m / s, preferably about 2 to 4 m / s are operated, so that a large area with constant temperature in particular on the adjusts the entire substrate to be coated.
  • the oven is divided into several zones in which different temperatures can be set, so that when passing through the circulating oven, the substrate to be coated can pass through a temperature profile. This ensures that the temperature required for curing and crosslinking at the surface can be kept sufficiently high while the core temperature remains below a critical value.
  • the number of zones is arbitrary, with values ranging from 3 to 5 zones proven.
  • sensors in particular infrared sensors for measuring the surface temperature, can be provided which regulate the temperature to the desired value via a control based on the measured values.
  • the radiation device according to the invention can also be used at this point of the arrangement, for example, for the post-curing of UV-curing coating systems with UV lamps.
  • a climate chamber in which the substrates to be coated are stored until the processing can be started.
  • the reason for this is that the wood-based materials and in particular MDF boards have a certain humidity, but should not exceed or fall below, in the range of greater than or equal to 5, preferably more than 8, in particular 5 to 15 wt -.% Moisture lies.
  • a Beflammungsstation be provided in which the surface is flamed to remove excess wood fibers and to compact the surface area by the flame.
  • a plasma treatment device may also be provided.
  • a primer in particular a biodegradable primer, which constitutes an air-tight or vapor-tight barrier layer for the moisture contained in the material and, moreover, the pores in the surface of the workpiece closes.
  • the primer is applied by water vapor-assisted spraying, as described in the German patent application DE 10 2004 012 889 is described, which is included here in full in the application.
  • water-soluble primers can be applied very smoothly with very good surface properties by means of steam-assisted spraying, with the additional advantage that the primer dries very quickly and can be further processed immediately, so that a continuous system for coating temperature-sensitive materials is realized can.
  • Fig. 1 a plant according to the invention for powder coating of MDF boards
  • Fig. 2a, 2b a side view and a transverse view of a radiation device according to the invention, which in the arrangement in Fig. 1 is used; and in
  • Fig. 3 a temperature-time diagram for one in the plant of Fig. 1 treated MDF board during irradiation by the radiator and passage through the convection oven.
  • Fig. 1 shows a schematic representation of the structure of a plant according to the invention for powder coating of MDF boards 8, as they are used in the furniture industry.
  • the plant has a total of six processing stations 1 to 6, which passes through the MDF plate 8 by means of a transport device 7.
  • the transport device 7 realized by a rail assembly, are received in the brackets 10, to which the MDF board 8 can be mounted.
  • the MDF board 8 is processed by means of a grinder 9 on the surfaces so that a smooth clean surface is formed.
  • the MDF plate is flamed in the processing station 2 by means of a gas burner 38 shown schematically on the surface to remove any remaining after the grinding process wood fibers and to densify the surface by the action of flame.
  • a plasma treatment plant (not shown) may be provided after or instead of the processing station 2 with the flame treatment, the surface also being densified by the action of plasma on the surface.
  • a painting installation with a spray booth 11 and an injection unit 14 is shown, through which a primer is applied to the surface of the MDF panel 8 by means of water vapor-assisted painting.
  • the primer serves to seal the surface gas-tight and fill the pores in the surface of the MDF board 8, as in the patent application of Patrick Oliver Ott relating to a method for pretreating surfaces of wood and / or wood fiber composite blanks for subsequent powder - or film coating is described.
  • a water-soluble primer which may be a commercial primer, is used, as it is in the context of a water vapor-assisted process, as in the patent application DE 10 2004 012 889 described, leads to particularly smooth and dense surface layers.
  • a steam generating device 12 is provided in addition to the paint supply device 13 in the painting of the processing station 3.
  • the powder is applied, the powder application station 4 also a housing 17 and corresponding means for an electrostatic powder application, such as spray guns 16, powder reservoir 15, feed lines 20 u.
  • an electrostatic powder application such as spray guns 16, powder reservoir 15, feed lines 20 u.
  • a discharge element 18 is additionally provided in the powder application station 4, opposite to each powder applicator 16, which is earthed via the line 19 and serves to dissipate excess charge and to smooth the field line pattern on the object 8 to be coated, in order to increase powder application at the edges. where field concentrations can form, to avoid.
  • Fig. 1 is in the powder application station 4 for each side of the MDF board 8, a powder applicator 16 is provided in the form of a spray gun 16, 16 opposite to the spray guns 16 discharge elements 18 are arranged.
  • a powder applicator 16 is provided in the form of a spray gun 16, 16 opposite to the spray guns 16 discharge elements 18 are arranged.
  • the second powder application spray gun 16 is not shown, since it is covered by the discharge element 18. Only the supply line 20 can be seen.
  • the discharge element 18 is formed in the embodiment shown as a lattice-shaped structure in which the bars are formed as flat bars with a depth of a few centimeters (4 to 6 cm) and a thickness of about 0.5 to 1 cm.
  • the diverter 18 further embodiments are conceivable, such as slat curtains, perforated plates, slotted plates u.
  • a device is provided with which the diverting elements 18 can be cleaned from time to time, for example by appropriate shaking u, the like.
  • the MDF plate 8 is transferred by the transport device 7 with the applied powder in the processing station 5, in which a radiation device 21 according to the invention is provided with short-wave infrared radiators to the powder located on the surface of the MDF plate 8 by a very fast and short Melt up heating up.
  • the radiation device 21 is in a larger representation in the Fig. 2a and 2b only part of the radiation device without the drive 22 (see FIG Fig. 1 ) is shown.
  • the radiation device 21 on a turnstile 29 as a support for the infrared lamps 35.
  • the turnstile 29 is about the axis 39, which is located in the center of the hub 29, rotatable or pivotable, as indicated by the arrows 32.
  • a ring 46 is provided, which is designed as a polygon.
  • the polygon ring 46 has ten in the embodiment shown Linear sections on which the infrared lamps 35 are arranged.
  • Mounting plates 33 are provided on the polygon ring 46 or the individual linear sections, which are arranged around an axis of rotation 47 inclined to the polygon ring 46 and the turnstile 29 and out of the plane that the turnstile 29 and the polygon ring 46th spans.
  • the mounting plates 33 at an acute angle to the normal of the plane of the turnstile 29 and the polygon ring 46, which is perpendicular to the transport plane, which is given by the MDF board 8 and spanned by the transport direction 36 and the vertical 37 thereto is.
  • the mounting plates 33 are arranged pivotable about the axis of rotation 47 so that the angle of inclination and the direction of emission of the mounted on the mounting plates 33 infrared lamps is adjustable.
  • the polygon ring 46 projects with the infrared lamps 35 disposed thereon in the vertical direction to be treated MDF boards, so that by the inclined arrangement of the infrared lamps on the mounting plates 33 Einstrahlschkeit the infrared lamps on the top and bottom the suspended MDF panels 8 consists.
  • the transport device is shown in greater detail, wherein the brackets 10 are arranged on movable carriage 30, which move in a rail assembly 31 of a substantially closed hollow profile.
  • the mounts are conductive in the contact area with the MDF plates and otherwise insulating to ensure discharge of charge and otherwise to avoid field line concentrations.
  • the MDF board 8 After passing through the radiation device with the short-wave infrared emitters, the MDF board 8 thus processed enters directly into a convection oven 6 as the sixth processing station (see Fig. 1 ), in which in several zones, for example, three zones corresponding heated circulating air, for example, through inlet openings 24th from bottom to top (see arrow 27) is guided to the suction 25.
  • the speed of the circulating air very high, for example in the range from 1 to 5 m / s, preferably 2 m / s, so that over a long distance a constant temperature profile can be set.
  • infrared sensors 26 can be used in the housing 23 of the circulating air oven 6, which measure the surface temperature of the MDF plate 8 and thus can control the temperature control of the circulating air oven 6.
  • Fig. 3 This is in the diagram of Fig. 3 shown in which the temperature is plotted against time.
  • the horizontal line 45 indicates, for example, the desired maximum core temperature for the MDF board 8.
  • the other curves indicate the ambient temperature near the MDF board (curve 40), the surface temperatures on the MDF board (curves 41 and 42), and the core temperatures in the MDF board (curves 43 and 44) as the radiation tool passes through 21 and the convection oven 6 at.
  • the radiation device 21 As can be seen from the diagram, very rapid heating of the surface and of the powder adhering thereto is achieved by the radiation device 21 and the heating with the short-wave infrared emitters 35, while the core temperature of the MDF plate 8 increases only much more slowly. Even after brief irradiation in the range of a few seconds to one or two minutes, the ambient temperature in the vicinity of the plate can reach values of 145 ° C to 160 ° C. The surface temperature at the plate reaches in the embodiment shown values of 130 ° C to 140 ° C.
  • the surface temperature of the MDF plate 8 is kept almost constant by the hot circulating air while the core temperature continues to rise slowly (curves 43 and 44).
  • the temperature in the rear zones is gradually reduced as the MDF plate 8 passes through the circulating air oven 6, so that the surface temperature is kept as high as possible to achieve rapid curing and crosslinking of the powder, while the core temperature is below the critical Temperature is maintained.
  • the inventive method as has been shown in the embodiment, very uniform powder coatings can be produced on MDF boards, without causing damage to the MDF board.
  • MDF boards should preferably have a residual moisture content of more than 5, in particular more than 8, preferably up to 15,% by weight, which can be achieved, for example, by storage in climatic chambers or the like.
  • the resistance in this case has a value of about 10 11 ⁇ .
  • the MDF boards have a density of about 800 kg / m 3 +/- 20 kg / m 3 .
  • the conductivity can be achieved for example by appropriate additives or by conductive primer coatings.
  • Essential in the arrangement and in the method is that by the special geometry of the radiation device (21) or the corresponding operation a uniform, sufficient, but short exposure to radiation on the surface of the substrate to be coated (8) is possible without the core temperature of the substrate rises above a critical value.
  • a sanding station (1), a flame-treatment station (2), a coating station (3), a powder application station (4), a radiation device (5), a curing / crosslinking area (6) and / or a post-curing area are preferably provided which preferably can be run continuously.
  • the radiation device (21) is characterized in that the radiators are arranged in a ring or circular or movable, while at the powder application station (4) Deriving elements are provided which serve to smooth the electric field at the surface of the substrates and thus powder concentrations at edges u. Like. avoids.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Microbiology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Coating By Spraying Or Casting (AREA)

Claims (27)

  1. Poste de traitement pour le traitement aux rayons de surfaces d'objets (8) qui sont déplacés en passant par le poste de traitement le long d'un sens de transport des objets lors du revêtement par poudre avec un appareil de rayonnement avec plusieurs émetteurs de rayons d'énergie (35) qui sont placés sur au moins un support et avec un dispositif de transport le long du sens de transport des objets, le/les support(s) (29, 33, 46) ou les émetteurs de rayons d'énergie (35) définissant substantiellement un plan parallèlement au sens de transport des objets,
    caractérisé en ce
    que le(les) support(s) (29, 33, 46) ou les émetteurs de rayons d'énergie (35) est(sont) configuré(s) déplaçable(s) soit de manière rotative ou pivotante parallèlement au sens de transport des objets, soit de manière linéaire dans un plan parallèlement au sens de transport des objets si bien que l'objet peut être chargé d'une puissance de rayonnement uniforme.
  2. Poste de traitement selon la revendication 1,
    caractérisé en ce
    que le ou les émetteur(s) de rayons d'énergie est(sont) placé(s) en forme de cercle ou d'anneau.
  3. Poste de traitement selon la revendication 2,
    caractérisé en ce
    que le(les) support(s) ou le(les) émetteur(s) de rayons sont rotatif(s) ou pivotant(s) autour d'un axe de rotation (39) par le centre de l'anneau (46) ou du cercle.
  4. Poste de traitement selon l'une des revendications précédentes,
    caractérisé en ce
    que le ou les émetteurs(s) de rayons d'énergie sont placés déplaçables sur le support (29, 46), en particulier rotatif(s) autour d'un axe (47) parallèlement au plan du support.
  5. Poste de traitement selon l'une des revendications précédentes,
    caractérisé en ce
    que le ou les émetteurs(s) de rayons d'énergie est(sont) placé(s) de telle manière qu'ils dépassent l'objet à chauffer au moins dans une dimension, de préférence perpendiculairement au sens de transport, au moins une partie de l'émetteur(des émetteurs) étant déplacée par le déplacement de l'émetteur ou des émetteurs d'énergie au-delà de la limite de l'objet.
  6. Poste de traitement selon l'une des revendications précédentes,
    caractérisé en ce
    que le ou les émetteurs(s) de rayons d'énergie (35) sont placés sur le support de telle manière que leur sens de rayonnement principal forme un angle aigu avec le plan de transport couvert par le sens de transport (36) et la verticale (37) par rapport à celui-ci.
  7. Poste de traitement selon l'une des revendications précédentes,
    caractérisé en ce
    que le support est configuré comme un disque de préférence en forme de cercle ou polygonal ou un anneau (46) qui présente des éléments de montage (33) placés le long de la circonférence ou à angle aigu sur les côtés, en particulier pivotants par rapport à la normale du disque dans la plage de 0° à 90°, contre lesquels les émetteurs de rayons d'énergie (35) sont placés.
  8. Poste de traitement selon l'une des revendications précédentes,
    caractérisé en ce
    qu'au moins deux supports placés en face l'un de l'autre sont prévus qui forment entre eux une voie de passage pour l'objet à chauffer (8).
  9. Poste de traitement selon la revendication 8,
    caractérisé en ce
    que l'espacement des émetteurs de rayons l'un par rapport à l'autre est variable perpendiculairement à la voie de passage.
  10. Poste de traitement selon l'une des revendications précédentes,
    caractérisé en ce
    que les émetteurs d'énergie sont des émetteurs à rayons infrarouges, en particulier des émetteurs à rayons infrarouges à ondes courtes et/ou à ondes moyennes, et/ou des émetteurs de rayons ultraviolets.
  11. Dispositif pour le revêtement par poudre d'objets, en particulier d'objets en forme de plaques ou de disques,
    caractérisé en ce
    qu'il comprend un poste de traitement (5) selon l'une des revendications précédentes.
  12. Dispositif selon la revendication 11,
    caractérisé en ce
    qu'il présente un poste d'application de la poudre (4) et une zone (6) pour durcir ou réticuler la poudre, en particulier un four, de préférence un four à air pulsé, le poste de traitement (21) étant placé entre le poste d'application de la poudre et la zone de durcissement/de réticulation et/ou dans la zone de durcissement/de réticulation, en particulier dans la zone de durcissement ultérieur.
  13. Dispositif selon la revendication 12,
    caractérisé en ce
    que le poste de traitement (5) est placé directement dans la zone de l'entrée de la zone de durcissement/de réticulation (6) ou est intégré à celle-ci.
  14. Dispositif selon l'une des revendications 11 à 13,
    caractérisé en ce
    qu'il est prévu un dispositif de transport (7) pour le transport entièrement automatique des objets à revêtir par au moins des parties du dispositif.
  15. Dispositif selon l'une des revendications 11 à 14,
    caractérisé en ce
    qu'un ou plusieurs postes de traitement de surface (1 à 3) sont prévus qui comprennent en particulier des dispositifs de meulage, des installations de traitement à plasma, des dispositifs de traitement à la flamme, des installations de laquage et équivalent.
  16. Dispositif selon la revendication 15,
    caractérisé en ce
    que l'installation de laquage (3) est un dispositif pour l'application assistée par vapeur d'eau ou la projection en particulier de primers solubles dans l'eau.
  17. Dispositif selon l'une des revendications 11 à 16,
    caractérisé en ce
    que la zone de durcissement/réticulation (6) présente plusieurs zones dans lesquelles différentes conditions de durcissement/réticulation peuvent être réalisées, en particulier différentes plages de températures.
  18. Dispositif selon l'une des revendications 12 à 17,
    caractérisé en ce
    que le four à air pulsé est configuré de telle manière qu'une vitesse d'air élevée de 1 à 5 m/s, en particulier de 2 à 4 m/s, est réglable.
  19. Dispositif selon l'une des revendications 13 à 18,
    caractérisé en ce
    que le guidage de l'air dans le four à air pulsé est configuré tel que l'air peut être guidé du haut en bas, de bas en haut, aussi bien de bas en haut que de haut en bas avec un passage latéral et/ou en alternance à partir du bas et du haut.
  20. Dispositif selon l'une des revendications 11 à 19,
    caractérisé en ce
    qu'un ou plusieurs capteurs (26) sont prévus pour la détection des températures, en particulier des capteurs infrarouges pour la détection de la température de la surface, avec les valeurs desquels la température est réglée par une commande.
  21. Dispositif selon l'une des revendications 12 à 20,
    caractérisé en ce
    que le poste d'application de la poudre comprend un bâti (17), un dispositif de maintien déplaçable à travers le bâti pour les objets à revêtir et un ou plusieurs moyens d'application de poudre, en particulier des dispositifs d'application au pistolet, un ou plusieurs éléments de dérivation (18) pour dériver la charge et lisser le parcours du champ électrique étant de plus prévu(s) sur l'objet à revêtir qui est placé en face du ou des moyens d'application de la poudre (16), la voie de transport du dispositif de maintien et donc l'objet à revêtir étant placé entre l'élément ou les éléments de dérivation et le ou les moyens d'application de la poudre.
  22. Dispositif selon la revendication 21,
    caractérisé en ce
    que l'élément de dérivation (18) est configuré comme une tôle perforée, une structure de grille, une tôle à fentes avec une pluralité de fentes placées parallèlement l'une à l'autre ou avec une pluralité de lamelles placées l'une à côté de l'autre.
  23. Procédé pour le revêtement par poudre d'objets, en particulier d'éléments en bois ou en fibres de bois plaqués,
    caractérisé en ce
    que la poudre est appliquée de manière électrostatique, est ensuite fondue par un poste de traitement (5) selon l'une des revendications 1 à 10 et est ensuite durcie ou réticulée.
  24. Procédé selon la revendication 23,
    caractérisé en ce
    que la surface est traitée avant l'application de la poudre dans l'ordre de l'énumération, par meulage et/ou traitement à plasma et/ou traitement à la flamme et/ou laquage avec un primer, de préférence par projection assistée par vapeur d'eau.
  25. Procédé selon la revendication 23 ou 24,
    caractérisé en ce
    que la température de la surface lors du traitement aux rayons de la poudre est supérieure à 110 °C, en particulier est supérieure à 140 °C, est de préférence de l'ordre de 140 °C à 160 °C et que la température du noyau reste en dessous de 90 °C.
  26. Procédé selon l'une des revendications 23 à 25,
    caractérisé en ce
    que pendant le durcissement ou la réticulation la température de la surface est supérieure à 110 °C, est maintenue de préférence de l'ordre de 115 °C à 130 °C, en particulier est maintenue pratiquement constante pour une durée déterminée et/ou est abaissée par degrés.
  27. Procédé selon l'une des revendications 23 à 26,
    caractérisé en ce
    que pendant le durcissement ou la réticulation la température du noyau est maintenue en dessous de 90°C, de préférence de l'ordre de 70 °C à 90 °C.
EP05845527A 2004-12-10 2005-12-06 Poste d'application de poudre et systeme pour appliquer un revetement sur des materiaux sensibles a la temperature et procede associe Not-in-force EP1725341B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10184168A EP2283933A3 (fr) 2004-12-10 2005-12-06 Poste d'application de poudre et systeme pour appliquer un revetement sur des materiaux sensibles a la temperature et procede associe
PL05845527T PL1725341T3 (pl) 2004-12-10 2005-12-06 Stanowisko do nanoszenia proszku przeznaczone do pokrywania materiałów wrażliwych na temperaturę oraz odpowiadający temu sposób

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004059634 2004-12-10
DE102005003802A DE102005003802A1 (de) 2004-12-10 2005-01-26 Strahlungsgerät sowie Pulverauftragsstation und Anordnung zur Beschichtung von temperatursensiblen Materialien und Verfahren hierzu
PCT/EP2005/056543 WO2006061391A2 (fr) 2004-12-10 2005-12-06 Appareil a rayonnement, poste d'application de poudre et systeme pour appliquer un revetement sur des materiaux sensibles a la temperature et procede associe

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP10184168.2 Division-Into 2010-09-30

Publications (2)

Publication Number Publication Date
EP1725341A2 EP1725341A2 (fr) 2006-11-29
EP1725341B1 true EP1725341B1 (fr) 2011-07-20

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EP10184168A Withdrawn EP2283933A3 (fr) 2004-12-10 2005-12-06 Poste d'application de poudre et systeme pour appliquer un revetement sur des materiaux sensibles a la temperature et procede associe
EP05845527A Not-in-force EP1725341B1 (fr) 2004-12-10 2005-12-06 Poste d'application de poudre et systeme pour appliquer un revetement sur des materiaux sensibles a la temperature et procede associe

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Country Status (7)

Country Link
US (1) US20090126628A1 (fr)
EP (2) EP2283933A3 (fr)
AT (1) ATE516889T1 (fr)
DE (1) DE102005003802A1 (fr)
PL (1) PL1725341T3 (fr)
RU (1) RU2403988C2 (fr)
WO (1) WO2006061391A2 (fr)

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Also Published As

Publication number Publication date
EP2283933A3 (fr) 2011-06-01
EP2283933A2 (fr) 2011-02-16
US20090126628A1 (en) 2009-05-21
ATE516889T1 (de) 2011-08-15
EP1725341A2 (fr) 2006-11-29
DE102005003802A1 (de) 2006-06-14
RU2403988C2 (ru) 2010-11-20
RU2007121324A (ru) 2009-02-10
PL1725341T3 (pl) 2011-12-30
WO2006061391A2 (fr) 2006-06-15
WO2006061391A3 (fr) 2006-10-26

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