EP1649229B1 - Dispositif pour faire durcir un revetement, constitue d'un materiau durcissant par rayonnement electromagnetique, notamment d'une peinture uv ou d'une peinture a durcissement thermique, d'un objet - Google Patents

Dispositif pour faire durcir un revetement, constitue d'un materiau durcissant par rayonnement electromagnetique, notamment d'une peinture uv ou d'une peinture a durcissement thermique, d'un objet Download PDF

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Publication number
EP1649229B1
EP1649229B1 EP04763166A EP04763166A EP1649229B1 EP 1649229 B1 EP1649229 B1 EP 1649229B1 EP 04763166 A EP04763166 A EP 04763166A EP 04763166 A EP04763166 A EP 04763166A EP 1649229 B1 EP1649229 B1 EP 1649229B1
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EP
European Patent Office
Prior art keywords
radiator
lifting platform
container
truck
electromagnetic radiation
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
EP04763166A
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German (de)
English (en)
Other versions
EP1649229A2 (fr
Inventor
Werner Swoboda
Werner Schuster
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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
Priority claimed from DE102004023537A external-priority patent/DE102004023537B4/de
Application filed by Eisenmann SE filed Critical Eisenmann SE
Publication of EP1649229A2 publication Critical patent/EP1649229A2/fr
Application granted granted Critical
Publication of EP1649229B1 publication Critical patent/EP1649229B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F26B15/16—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 the objects or batches of materials being carried by wheeled trucks
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • UV-curable materials e.g. Vehicle bodies
  • UV-curable materials e.g. Vehicle bodies
  • Object of the present invention is to provide a device of the type mentioned in such a way that even coatings on complicated shaped, very uneven objects, in particular vehicle bodies, can be cured with good results.
  • the conveyor system comprises a truck with a chassis, which has a height adjustable motor relative to the chassis lifting platform for receiving the object, and that the at least one radiator is arranged so that the truck with the recorded object can be passed under the at least one radiator.
  • the invention is based on the finding that can be superimposed with such a height-adjustable lifting platform having lift truck in a very simple manner, a movement in the vertical direction with a translational movement in the horizontal direction.
  • This makes it possible to pass the article on the truck under the at least one emitter and thereby to change the height of the lifting platform so that the object applied to it is exposed uniformly to all surface areas of a radiation amount and a radiation intensity, as they are required for curing of the material ,
  • complete curing only occurs when the electromagnetic radiation hits the coating on the one hand above a threshold intensity and, on the other hand, this intensity is maintained over a certain period of time. If the intensity is too low, a polymerization reaction does not start or is incomplete; if irradiation is too short, only incomplete curing will be achieved, even if the intensity is sufficient.
  • the lifting platform relative to the chassis is tilted by a motor.
  • the tilt can be about one Transverse axis of the lift truck, a longitudinal axis of the lift truck or superimposed on both said axes done.
  • a Verkipp south about a transverse axis makes it possible to dispense with a translational movement in the horizontal direction if necessary., Since now the object can still be oriented in many cases with respect to several arranged in a plane radiator or a large area radiator so that recessed areas of the upward facing surface of the article are still sufficiently exposed to electromagnetic radiation.
  • a Verkipp south about a longitudinal axis of the lift truck is particularly advantageous if lateral radiators are provided and the article also has on its side surfaces a curved or otherwise highly uneven contour.
  • the lifting platform comprises two support plates, which are separated by at least one variable-length punch.
  • This stamp may be, for example, hydraulically actuated telescopic cylinder. Tilting about two tilt axes requires at least two punches.
  • the device comprises a container having an opening through which the article is inserted by height adjustment of the lifting platform in the container, wherein the interior of the container can be acted upon by at least one radiator with electromagnetic radiation.
  • This container ensures that in the lateral direction no electromagnetic radiation and no gases can escape, which is to avoid health reasons for the operator.
  • the container may be formed as an independent part, as a channel or as a suitably lined floor or roof area of a cabin housing o. ⁇ .
  • the radiators In the above embodiments in which the radiators are arranged in the walls or in a ceiling of the container, the radiators substantially form surface radiators.
  • radiator which are designed as linear emitters.
  • an embodiment of the invention is advantageous in which a plurality of radiators are arranged on a bridge-like portal frame, which has two substantially vertical legs and a substantially horizontal base. The object to be treated is "threaded through” between the vertical legs of the portal frame, as it were.
  • the arrangement of the radiators on the substantially vertical legs of the portal frame can be adapted to the course of the side surfaces of the article.
  • a uniform and complete curing of the coating on the side surfaces of the object can be achieved even with a curved side contour of the article.
  • the assembly the radiator on the substantially horizontal base may be advantageous to have the assembly the radiator on the substantially horizontal base to adapt to the profile of the downwardly facing surface of the object.
  • Such a segmental arrangement of the radiators on the horizontal base makes it possible to bring the object past the arrangement of the radiator, that their distance from the downwardly facing surface of the object remains substantially constant.
  • a protective gas can be supplied to the interior of the container.
  • the shielding gas has primarily the function of preventing the presence of oxygen in the radiation area of the radiators, since oxygen can be converted into harmful ozone, in particular under the influence of UV light, and also impairs the course of the polymerization reaction.
  • the inert gas is heavier than air.
  • This can be considered, for example, carbon dioxide.
  • the protective gas is lighter than air.
  • helium is used for this purpose.
  • an inlet for the protective gas is in the immediate vicinity of the at least one radiator, then this can be used at the same time as a cooling gas for the radiator.
  • at least one inlet can also be aligned so that the protective gas emerging from the inlet is directed directly onto the surface currently being irradiated. In this way, it is ensured that the proportion of undesirable foreign gases is very low at the reaction site where the electromagnetic radiation causes the curing.
  • At least one radiator is assigned a movable reflector on the side facing away from the object, an additional adaptation of the radiation direction to the course of the surface of the object to be treated is possible.
  • the container may be at least partially lined with a reflective layer. As a result, emitters with lower power can be used.
  • the layer is uneven.
  • the reflections take place at different angles under these circumstances, so that the interior of the container is filled very uniformly with electromagnetic radiation of different propagation directions.
  • a layer material for example, is an aluminum foil into consideration, since this has a very good reflectivity for electromagnetic radiation and is also inexpensive. In addition, an uneven layer can thus be realized in a simple manner, namely by crumpling the aluminum foil.
  • the device according to the invention should have a cabin housing which prevents an uncontrolled escape of gases and electromagnetic radiation. Both would be hazardous to health for the operating personnel.
  • a lock for the truck can be provided in each case.
  • These locks prevent that when entering and extending the trolley into or out of the cabin housing larger amounts of air from the outside atmosphere get into the cabin housing.
  • the locks protect operators from hazardous electromagnetic radiation.
  • This device may comprise a catalyst for the catalytic binding of the oxygen, a filter for absorption or else a filter for the adsorption of oxygen.
  • the device for removing the solvent from the material of the coating may have a preheating zone.
  • the device for setting this powdered material may have a corresponding preheating zone.
  • the device for completing the curing has a reheating zone.
  • the initiated by the electromagnetic radiation curing reaction can continue to run in the reheating zone until the coating is completely cured.
  • the device has a controller on, which controls the height of the lifting platform automatically in response to the upward-facing outer contour of the object.
  • the height of the lifting platform can be changed by the controller such that during a translational movement of the object past the at least one radiator, the distance in the vertical direction between the object and the at least one radiator remains at least approximately constant. In this way, it is ensured that all upwardly facing surface areas of the object of the same radiation intensity and in about the same amount of radiation, d. H. the same irradiation in a photometric sense.
  • the spatial form data of the object required for such a control can be provided by a higher-level data processing system.
  • the device can also detect this spatial shape data itself.
  • the measuring station comprises only one or more light barriers, which are preferably arranged in the immediate vicinity of the at least one radiator and interact with the controller. Interrupts the object to be irradiated a light barrier, so a corresponding evasive movement of the object is caused in real time.
  • the measuring station has at least one optical scanner, which may contain, for example, an infrared light source through which the object can be scanned scanner-like in at least one direction.
  • Another way to accurately capture the spatial shape is through digital image processing and recognition of video images of the subject.
  • the measuring station then has a video camera and a device for digital image recognition.
  • the truck in the embodiments in which the article is passed on the pallet truck under a gantry, the truck must also perform a translational movement. Since the coating on the object must not be exposed too short of the electromagnetic radiation, this translational movement can not be performed arbitrarily fast. If a pallet truck is slowly guided through the gantry and, after transfer of the item to a conveyor system, subsequently returned empty to its starting point, this process takes a not inconsiderable amount of time.
  • the conveyor system comprises exactly one pallet truck and a carriageway for the truck, along which arranged the at least one radiator with a receiving station for receiving the object on the lifting platform and a dispensing station for dispensing the object spatially coincide.
  • Such an arrangement causes the truck with the object applied thereto twice, namely once in the forward and once in the reverse direction, past the at least one radiator and thereby returns to its starting point. There, the object can be removed from the lifting platform, which is then free for receiving a new object to be irradiated.
  • the travel speed past the at least one emitter can be approximately doubled in this embodiment of the invention, since all surface regions are exposed twice to the electromagnetic radiation. This embodiment of the invention requires comparatively few plant components.
  • a higher throughput can be achieved when the conveyor system comprises at least two pallet trucks, extending between a receiving station for receiving the object on the lifting platform and a dispensing station for dispensing the article two lanes for the truck so that the trucks between the receiving station and the Dispensing station can circulate in a closed circuit.
  • the electromagnetic radiation is preferably UV light or infrared radiation.
  • FIG. 1 a device for curing UV varnishes is shown in a highly simplified and not to scale longitudinal section and indicated generally at 10.
  • the exemplified curing device 10 is part of a painting, which is intended to apply a multi-layer paint on pre-assembled vehicle bodies 12.
  • the curing device 10 comprises a per se known roller conveyor system for the vehicle bodies 12, which comprises a roller conveyor 14, which is divided by an opening 15 to be described in two sub-segments 14 a and 14 b, and resting thereon carrier 16 for the motor vehicle bodies 12.
  • Such carriers also referred to as skid carriers, have runner-like sliders with which they rest on the roller conveyor 14. Since such a roller conveyor system is known per se in the prior art, the presentation of further details is omitted.
  • the vehicle bodies 12 of the curing device 10 can be supplied and transported between the individual stations of the curing device 10. These stations are a preheating zone 18, an irradiation device 20 and a reheating zone 22.
  • the preheating zone 18 and the reheating zone 22 each include 24 and 26 indicated and designed as hot air heaters heaters. Alternatively, heating by IR emitters or by means of a magnetron is suitable for generating microwaves.
  • the preheating zone 18 may perform different functions depending on the type of coating material. If this material is a solvent-based material, for example a water-based paint, the solvents are removed as far as possible. If it is a powder material, then the preheating zone 18 serves to anneal the powder and in this way to make ready for the polymerization.
  • the irradiation device 20 comprises a cabin housing 28, which is designed so that neither a gas exchange with the environment nor leakage of UV light is possible.
  • a cabin housing 28 which is designed so that neither a gas exchange with the environment nor leakage of UV light is possible.
  • 28 windows 32 are embedded on the outer walls of the cabin housing, which are permeable to visible light, but impermeable to UV light.
  • the irradiation device 20 further comprises an inlet lock 34 and an outlet lock 36, the carrier 16 with the vehicle bodies 12 mounted thereon when entering the interior 30th as well as when driving out must happen from this.
  • the inlet lock 34 and the outlet lock 36 are each formed in the illustrated embodiment as double locks with two movable roller doors 341, 342 and 361, 362.
  • a ceiling 37 is retracted such that the underlying part of the inner space 30 forms a kind of container 38.
  • the blanket 37 contains the above-mentioned opening 15, over which the roller conveyor 14 is interrupted.
  • the ceiling 37 is dispensed with and instead a separate container designed as a trough is placed in the then free inner space 30, over which part of a roller conveyor 14 extends.
  • the container 38 is, regardless of the nature of its execution, filled with a protective gas which is stored in a gas tank 40 and via a line 42 opening into the bottom of the container 42 can be introduced.
  • the shielding gas is carbon dioxide, since it is heavier than air in the gaseous state and thus fills the upwardly open container 38 much like a liquid.
  • the amount of the protective gas supplied via the line 42 is in dynamic equilibrium with the amount of protective gas which escapes inter alia via the inlet and outlet locks 34 and 36.
  • the inner space 30 is connected to a regeneration circuit 42, which has the task of oxygen, which is introduced via the vehicle bodies 12 into the inner space 30 or when opening the inlet lock 34 or the outlet lock 36, from the prevailing in the inner space 30 atmosphere remove.
  • the interior 30 is continuously withdrawn via a line 43 gas and passed, for example via a catalyst 39, which catalytically binds the oxygen. A portion of this gas is returned via line 47 back into the interior 30 of the cabin housing 28, while another part is discharged via a line 51 into the outside atmosphere.
  • a generally designated 46 pallet truck is placed and translationally movable in a direction indicated by a double arrow 48 direction, including a arranged on the truck 46 and in the FIG. 1 not shown drive serves.
  • the lift truck 46 has a chassis 50 and a lifting device 52, as it is known per se in the prior art and can be performed, for example, as a hydraulically or electrically driven scissors drive.
  • the upwardly facing plane of the lifting device 52 which serves to receive carriers 16, forms a lifting platform 54.
  • this lifting platform 54 can also consist of a frame connecting the scissor legs movably;
  • the term "platform" does not have to be inevitably imply a continuous surface. With the help of the lifting device 52, the lifting platform 54 can be moved vertically in the direction indicated by a double arrow 49 direction.
  • a portal frame 44 is further arranged, the details of which below with reference to the FIG. 2 be explained.
  • the portal frame 44 is shown in a front view in an enlarged view.
  • the gantry 44 spans bridge-like a provided for the travel of the lift truck 46 56 on the bottom surface 45 of the interior 30.
  • a UV light-generating roof lights 58 At the portal frame 44 are a UV light-generating roof lights 58, a pair on both sides of the road 56 arranged lower UV light-generating Side radiators 60a, 60b and a pair on both sides of the road 56 arranged upper UV light generating side radiators 62a, 62b attached.
  • the roof radiator 58 and the four side radiators 60a, 60b and 62a, 62b each contain, as is more closely indicated by reference numerals for the roof radiator 58, a rod-shaped light source 64.
  • Each UV radiator is also associated with a reflector 66.
  • the rod-shaped light source 64 may also be replaced by a plurality of approximately point-shaped individual light sources.
  • the UV lamps 58, 60a, 60b, 62a and 62b are attached to the gantry 44 so that their arrangement is approximately the outer contour of the vehicle body 12 corresponds.
  • the two lower side radiators 60a, 60b are articulated to the two upper side radiators 62a and 62b so that these lower side radiators 60a, 60b can be automatically adapted to the shape of the lower half of the vehicle body 12, while these are the portal frame 44 passes on the lift truck 46.
  • an additional UV lamp can be used, which is a mobile , in the interior of the vehicle body 12 insertable robot arm (not shown) is held.
  • the container 38 In the vicinity of the portal frame 44, the container 38 is lined with a crumpled aluminum foil 73 in order to achieve a high light reflection.
  • the carrier 16 with vehicle body 12 placed thereon is moved on the roller conveyor 14 to the inlet lock 34.
  • the carrier 16 passes to the vehicle body 12 successively the two roller doors 341, 342 of the inlet lock 34 and thus enters the interior 30 of the cabin housing 28. There, the carrier 16 is taken from the available lifting platform 54 of the lift truck 46.
  • the lifting platform 54 is lowered by means of the lifting device 52 so far that the pallet truck 46 can ride along with the now arranged thereon vehicle body 12 under the ceiling 37.
  • the vehicle body 12 is located completely within the protective gas atmosphere that prevails in the container 38.
  • FIG. 1 ajar representation of the interior 30 of the cabin housing 28 with the container 38, the portal frame 44 and the truck 46 shown.
  • the lifting platform 54 is still raised so far that a front flap 70 of the vehicle body 12 with an optimum for the cure target distance of z. B. is spaced about 30 cm from the roof radiator 58, while the lift truck 46 moves in the direction indicated by an arrow 72 direction on the roadway 56.
  • the lifting platform 54 is lowered so far that now the roof 74 of the vehicle body 12 the desired distance to the roof lights 58 occupies. This condition is in the FIG. 3b shown.
  • the lifting platform 54 is lifted by means of the lifting device 52 so far that the carrier 16 with the vehicle body 12 carried by it on the in the FIG. 1 shown right sub-segment 14b of the roller conveyor 14 can be driven.
  • the carrier 16 with the vehicle body 12 then passes through the outlet lock 36 and leaves the irradiation device 20th
  • the carrier 16 At the end of the carrier 16 is still supplied to the vehicle body 12 of the reheating zone 22, in which a temperature of about 105 ° C prevails. There lingers the Vehicle body 12 for about five to ten minutes in which the polymerization reaction is complete. This time can vary greatly depending on the coating material.
  • a central controller 90 is provided.
  • it has the task of controlling the movements of the lift truck 46 in the horizontal direction (double arrow 48) and also perpendicular thereto in the vertical direction (double arrow 49).
  • the controller 90 has a memory 91 in which spatial shape data of the vehicle body 12 are stored.
  • This spatial form data can z. B. are retrieved from a higher-level data processing system, in which all the curing device 10 continuous vehicle bodies 12 relevant data such as the type and color of the paint and body type and shape are deposited. Then only one reading device is needed, which recognizes the type of the incoming vehicle body 12, so that the spatial form data associated with this type can be called up.
  • the measuring device 80 has a U-shaped frame on which a plurality of optical scanners 82 with infrared light sources in the vertical direction 49 are attached.
  • the optical Scanners 82 detect scanner-like the outer contour of the vehicle body 12 as they pass through the measuring device 80th
  • the measuring device may also be sufficient to design the measuring device as a simple light barrier arrangement, which is arranged in the immediate vicinity of the portal frame 44.
  • the interruption of a photocell then indicates to the controller 90 that the vehicle body 12 is approaching the roof radiator 58 so far that the lifting platform 54 must be lowered.
  • Such a control results in a step-like lifting and lowering movement of the lifting platform 54, since the light barriers do not allow continuous monitoring of the outer contour.
  • FIG. 4 In the FIG. 4 is a lift truck 46 'is shown, in which on a first plane forming support plate 93 which is placed on the lifting device 52, four a rectangular arrangement forming punch 92 are arranged.
  • the punches 92 are hydraulically telescopic and can be extended independently.
  • the upper ends of the punches 92 which form a second plane 95, support the carrier 16.
  • the carrier 16 with the vehicle body 12 mounted thereon both about a transverse axis, as in the FIG. 4 indicated by a double arrow 94, as well as to tilt about a longitudinal axis of the lift truck 46.
  • Such a tilt about a longitudinal axis is in the FIG. 5 shown to a large extent the FIG. 2 equivalent. Unlike there, however, the side radiators 60a, 60b and 62a, 62b are vertically aligned. A uniform irradiation of the side surfaces of the vehicle body 12 is achieved here by tilting about its longitudinal axis.
  • FIGS. 6a and 6b show in a plan view of the interior 30 according to another embodiment of the invention, in which two pallets 461, 462 in circulating vehicle bodies 12 transport through the portal frame 44. It can also be moved through the system more than two trucks, so that the vehicles are transported and irradiated in a short pitch through the portal frame.
  • two lanes 561, 562 are also provided, which are separated by a partition 96 from each other. Between the two lanes 561 and 562, a connection can be created in the region of the two end faces of the interior 30 by sliding sliding doors 98, 100 into the partition wall 96, as shown in FIG FIG. 6b is shown.
  • the above embodiments are used for curing paints under UV light. However, they can also be used in paints which cure under the effect of heat, in particular in an inert gas atmosphere, that is to say for example in a CO 2 or nitrogen atmosphere. It then essentially only needs to be replaced by the UV emitters described by IR emitters. Other structural changes associated with the change of the electromagnetic radiation are known to the person skilled in the art and need not be explained in detail here.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Coating Apparatus (AREA)

Abstract

L'invention concerne un dispositif servant à faire durcir un revêtement d'un objet, notamment d'une carrosserie de véhicule (12), ce revêtement étant constitué d'une peinture UV, d'une peinture à durcissement thermique ou d'un matériau similaire. Le dispositif selon l'invention comprend au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b) générant un rayonnement électromagnétique. Il comprend également un système de transport (14, 16, 46) qui amène l'objet (12) à proximité de l'émetteur de rayonnement (58, 60a, 60b, 62a, 62b) puis l'éloigne de ce dernier. Ce système de transport (14, 16) comprend un chariot élévateur (46 ; 46') équipé d'un châssis (50) qui présente une plate-forme élévatrice (54), déplaçable par moteur verticalement par rapport au châssis (50), pour le logement de l'objet (12). L'émetteur de rayonnement (58, 60a, 60b, 62a, 62b) est placé de sorte qu'on peut faire passer le chariot élévateur (46 ; 46') et l'objet (12) qu'il porte sous l'émetteur de rayonnement (58, 60a, 60b, 62a, 62b), la position verticale de l'objet (12) pouvant être modifiée. Il est ainsi possible d'amener même des objets (12) à surfaces fortement inégales et tridimensionnellement courbes dans la zone de rayonnement des émetteurs de rayonnement (58, 60a, 60b, 62a, 62b) de telle façon que les surfaces sont uniformément exposées à une quantité et à une intensité de rayonnement nécessaires au durcissement.

Claims (41)

  1. Dispositif pour durcir un revêtement constitué d'un matériau durcissant par rayonnement électromagnétique, notamment d'une peinture UV ou d'une peinture à durcissement thermique, d'un objet, notamment d'une carrosserie de véhicule (12), comprenant
    a) au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b) générant un rayonnement électromagnétique ;
    b) un système de transport (14, 16, 46), lequel amène l'objet (12) à proximité de l'émetteur de rayonnement (58, 60a, 60b, 62a, 62b) et l'éloigne de nouveau de celui, et lequel comprend un chariot (46 ; 46') avec un châssis (50) qui présente une plateforme (54) pour le chargement de l'objet (12),
    et ledit au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b) étant disposé de façon que le chariot (46 ; 46') avec l'objet (12) chargé dessus puisse être guidé sous ledit au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b),
    caractérisé en ce que le chariot est un chariot élévateur et la plateforme une plateforme élévatrice réglage en hauteur par rapport au châssis au moyen d'un moteur.
  2. Dispositif selon la revendication 1, caractérisé en ce que la plateforme élévatrice (54) est inclinable par rapport au châssis (50) au moyen d'un moteur.
  3. Dispositif selon la revendication 2, caractérisé en ce que la plateforme élévatrice (54) comprend deux plans (93, 95) qui sont séparés l'un de l'autre par au moins un vérin (92) de longueur variable.
  4. Dispositif selon une des revendications précédentes, caractérisé en ce qu'il comporte un récipient (38) avec une ouverture (15) à travers laquelle l'objet (12) peut être introduit dans le récipient (38) par réglage en hauteur de la plateforme élévatrice (54), et que l'intérieur du récipient (38) peut être soumis à un rayonnement électromagnétique par au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b).
  5. Dispositif selon la revendication 4, caractérisé en ce qu'au moins un émetteur de rayonnement est intégré dans une paroi, un plafond ou un plancher du récipient.
  6. Dispositif selon la revendication 5, caractérisé en ce qu'au moins un émetteur de rayonnement est intégré dans les parois latérales opposées s'étendant parallèlement au mouvement de translation des objets et dans au moins une des deux parois frontales s'étendant perpendiculairement au mouvement de translation des objets ou dans un plafond ou un plancher du récipient.
  7. Dispositif selon la revendication 5, caractérisé en ce qu'une pluralité d'émetteurs de rayonnement est intégrée dans toutes les parois et dans un plafond ou un plancher du récipient.
  8. Dispositif selon une des revendications précédentes, caractérisé en ce que plusieurs émetteurs de rayonnement (58, 60a, 60b, 62a, 62b) sont disposés sur un portique (44) en forme de pont qui présente deux côtés essentiellement verticaux et une base essentiellement horizontale.
  9. Dispositif selon la revendication 8, caractérisé en ce que la disposition des émetteurs de rayonnement (58, 60a, 60b, 62a, 62b) sur les côtés essentiellement verticaux du portique (44) est adaptée au profil des surfaces latérales de l'objet (12).
  10. Dispositif selon la revendication 7 ou 8, caractérisé en ce que la disposition des émetteurs de rayonnement (58, 60a, 60b, 62a, 62b) sur la base essentiellement horizontale est adaptée au profil de la surface de l'objet (12) dirigée vers le haut.
  11. Dispositif selon une des revendications 4 à 10, caractérisé en ce qu'un gaz de protection peut être amené à l'intérieur du récipient (3 8).
  12. Dispositif selon la revendication 11, caractérisé en ce que le gaz de protection est plus lourd que l'air et est notamment du dioxyde de carbone.
  13. Dispositif selon la revendication 11, caractérisé en ce que le gaz de protection est plus léger que l'air et est notamment de l'hélium.
  14. Dispositif selon la revendication 12 ou 13, caractérisé en ce qu'une entrée (68a, 68b) pour le gaz de protection est prévue à proximité immédiate dudit au moins un émetteur de rayonnement.
  15. Dispositif selon une des revendications précédentes, caractérisé en ce qu'un réflecteur mobile (66) est associé à au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b) du côté éloigné de l'objet (12).
  16. Dispositif selon une des revendications 4 à 15, caractérisé en ce que le récipient (38) est revêtu au moins partiellement d'une couche réfléchissante.
  17. Dispositif selon la revendication 16, caractérisé en ce que la couche est inégale.
  18. Dispositif selon une des revendications 16 ou 17, caractérisé en ce que la couche est composée d'une feuille d'aluminium.
  19. Dispositif selon une des revendications précédentes, caractérisé en ce qu'il présente une enveloppe de cabine (28) qui empêche une sortie incontrôlée de gaz et de rayonnement électromagnétique.
  20. Dispositif selon la revendication 19, caractérisé en ce des sas (34, 36) sont prévus pour l'objet (12) à l'entrée et à la sortie de l'enveloppe de cabine (28).
  21. Dispositif selon la revendication 20, caractérisé en ce qu'à l'intérieur du sas (34) côté entrée, une entrée pour gaz de protection est disposée de façon qu'un espace vide présent dans l'objet (12) soit balayé par un gaz de protection.
  22. Dispositif selon la revendication 20 ou 21, caractérisé en ce qu'il est prévu un équipement (42) pour éliminer l'oxygène de l'atmosphère se trouvant à l'intérieur de l'enveloppe de cabine (28).
  23. Dispositif selon la revendication 22, caractérisé en ce que l'équipement (42) pour éliminer l'oxygène présente un catalyseur pour la fixation catalytique de l'oxygène.
  24. Dispositif selon la revendication 22 ou 23, caractérisé en ce que l'équipement (42) pour éliminer l'oxygène présente un filtre pour l'absorption de l'oxygène.
  25. Dispositif selon une des revendications 22 à 24, caractérisé en ce que l'équipement (42) pour éliminer l'oxygène présente un filtre pour l'adsorption de l'oxygène.
  26. Dispositif selon une des revendications précédentes, caractérisé en ce qu'il présente une zone de préchauffage (18) pour éliminer le solvant du matériau de revêtement.
  27. Dispositif selon une des revendications 1 à 25, caractérisé en ce qu'il présente une zone de préchauffage (18) pour la gélification de matériau pulvérulent.
  28. Dispositif selon une des revendications précédentes, caractérisé en ce qu'il présente une zone de post-chauffage (22) pour compléter le durcissement.
  29. Dispositif selon une des revendications précédentes, caractérisé en ce que le dispositif comprend une commande (90), laquelle commande la hauteur de la plateforme élévatrice (56) en fonction du contour extérieur de l'objet (12) dirigé vers le haut.
  30. Dispositif selon la revendication 29, caractérisé en ce que la hauteur de la plateforme élévatrice (56) est modifiable par la commande (90) de façon que, pendant un mouvement de transport de l'objet (12) devant ledit au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b), ni la quantité de rayonnement électromagnétique arrivant par unité de surface sur le matériau ni son intensité ne soient inférieures à des valeurs seuils prescriptibles nécessaires pour le durcissement.
  31. Dispositif selon la revendication 30, caractérisé en ce que la hauteur de la plateforme élévatrice (54) est modifiable par la commande (90) de façon que, pendant un mouvement de transport de l'objet (12) devant ledit au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b), la distance en direction verticale (49) entre l'objet (12) et ledit au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b) reste au moins approximativement constante.
  32. Dispositif selon la revendication 30 ou 31, caractérisé en ce que la commande (90) comprend une mémoire (92) pour mémoriser des données de forme tridimensionnelle de l'objet.
  33. Dispositif selon une des revendications 29 à 32, caractérisé en ce que le dispositif comprend un poste de mesure (80) placé avant ledit au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b) dans la direction de transport (48), qui permet de détecter les données de forme tridimensionnelle de l'objet (12).
  34. Dispositif selon la revendication 33, caractérisé en ce que le poste de mesure comprend au moins une barrière lumineuse.
  35. Dispositif selon la revendication 33 ou 34, caractérisé en ce que le poste de mesure comprend une caméra vidéo et un équipement d'analyse numérique d'images.
  36. Dispositif selon une des revendications 33 à 35, caractérisé en ce que le poste de mesure (80) comprend au moins un appareil de balayage optique (82), qui permet de balayer l'objet (12) à la manière d'un scanner au moins dans une direction.
  37. Dispositif selon la revendication 36, caractérisé en ce que l'appareil de balayage optique (82) comprend une source de lumière infrarouge.
  38. Dispositif selon une des revendications précédentes, caractérisé en ce que le système de transport (14, 16, 46) comprend exactement un chariot élévateur (46) et un chemin de roulement (56) pour le chariot élévateur (46), le long duquel ledit au moins un émetteur de rayonnement (58, 60a, 60b, 62a, 62b) est disposé, et qu'un poste de chargement pour le chargement de l'objet (12) sur la plateforme élévatrice (54) et un poste de déchargement pour le déchargement de l'objet (12) coïncident spatialement.
  39. Dispositif selon une des revendications 1 à 37, caractérisé en ce que le système de transport (14, 16, 46) comprend au moins deux chariots élévateurs (461, 462) et qu'entre un poste de chargement pour le chargement de l'objet (12) sur la plateforme élévatrice (54) et un poste de déchargement pour le déchargement de l'objet (12) s'étendent deux chemins de roulement (561, 532) pour les chariots élévateurs (461, 462), de façon que les chariots élévateurs (461, 462) puissent circuler en circuit fermé entre le poste de chargement et le poste de déchargement.
  40. Dispositif selon une des revendications précédentes, caractérisé en ce que le rayonnement électromagnétique est une lumière UV.
  41. Dispositif selon une des revendications précédentes, caractérisé en ce que le rayonnement électromagnétique est un rayonnement infrarouge.
EP04763166A 2003-07-24 2004-07-10 Dispositif pour faire durcir un revetement, constitue d'un materiau durcissant par rayonnement electromagnetique, notamment d'une peinture uv ou d'une peinture a durcissement thermique, d'un objet Not-in-force EP1649229B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10335006 2003-07-24
DE102004023537A DE102004023537B4 (de) 2003-07-24 2004-05-13 Vorrichtung zur Aushärtung einer aus einem Material, das unter elektromagnetischer Strahlung aushärtet, insbesondere aus einem UV-Lack oder aus einem thermisch aushärtenden Lack, bestehenden Beschichtung eines Gegenstandes
PCT/EP2004/007644 WO2005015102A2 (fr) 2003-07-24 2004-07-10 Dispositif pour faire durcir un revetement, constitue d'un materiau durcissant par rayonnement electromagnetique, notamment d'une peinture uv ou d'une peinture a durcissement thermique, d'un objet

Publications (2)

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EP1649229A2 EP1649229A2 (fr) 2006-04-26
EP1649229B1 true EP1649229B1 (fr) 2011-04-27

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US (1) US20070271812A1 (fr)
EP (1) EP1649229B1 (fr)
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WO2005015102A2 (fr) 2005-02-17
US20070271812A1 (en) 2007-11-29
EP1649229A2 (fr) 2006-04-26
WO2005015102A3 (fr) 2005-03-31
CA2533501A1 (fr) 2005-02-17

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