EP1614482B1 - Dispositif de pulvérisation avec confinement des gouttelettes - Google Patents

Dispositif de pulvérisation avec confinement des gouttelettes Download PDF

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Publication number
EP1614482B1
EP1614482B1 EP05014898.0A EP05014898A EP1614482B1 EP 1614482 B1 EP1614482 B1 EP 1614482B1 EP 05014898 A EP05014898 A EP 05014898A EP 1614482 B1 EP1614482 B1 EP 1614482B1
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EP
European Patent Office
Prior art keywords
droplets
spraying
spray head
baffle
suction
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Active
Application number
EP05014898.0A
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German (de)
English (en)
Other versions
EP1614482A1 (fr
Inventor
Horst Jahnke
Torsten Witting
Christian Thieme
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.)
Airbus Operations GmbH
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Airbus Operations GmbH
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Publication of EP1614482A1 publication Critical patent/EP1614482A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/32—Shielding elements, i.e. elements preventing overspray from reaching areas other than the object to be sprayed
    • B05B12/36—Side shields, i.e. shields extending in a direction substantially parallel to the spray jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material

Definitions

  • the present invention relates to a spraying device.
  • the invention relates to a spray device which can be used for coating surfaces.
  • the present invention relates to a spray device that can be used in the manufacture and repair of aircraft surfaces and a method for coating surfaces.
  • the material to be sprayed may contain chromates and toxic solvents (toluene, xylene, isocyanates), unhindered distribution is problematic and respiratory protection measures must be taken during the application. As a rule, no other work steps can be carried out in the immediate vicinity. There is also the possibility that chromate-containing solid particles deposit as dust and thus an increased cleaning effort is necessary before other work can be resumed without respiratory protection.
  • the US 2,488,195 relates to a device for spraying paint.
  • a suction path is formed between an inner wall surface of the outer casing and the outer wall surface of an intermediate casing, through which ink particles and drops can be drawn in the suction path and in a suction hose.
  • the US 2,270,579 relates to a padding cleaning device having a wall which forms an annular suction mouth surrounding a pressure nozzle.
  • the wall preferably protrudes slightly above the nozzle to achieve good circumferential closure when the device is pressed against a work surface.
  • the generic US 6,171,656 B1 relates to a device for collecting overspray (mist), which arises when spraying with paint.
  • the device comprises a cowling and a sprayer surrounded by the shroud.
  • the device has an outlet for removing the mist and a louver for supplying air into the device.
  • the GB 1,376,695 relates to a method for electrostatically applying a powder coating to an object.
  • the apparatus used in the method comprises an electrostatic spray gun and a liner having an inner liner and an outer liner extending farther than the inner liner.
  • the present invention provides a spraying device according to claim 1.
  • the spray device comprises a septum and a spray head.
  • the spray head is arranged in the septum and distributes droplets.
  • the septum inhibits the spread of the droplets in at least one undesired direction.
  • this makes it possible for droplets which are z. B. do not stick to the surface of the material, not immediately spread in the undesired direction.
  • the septum has an inside and an outside, wherein on the inside a volume is formed, in which the spray head injects the droplets.
  • the droplets sprayed by the spray head are encapsulated in the volume. Ie.
  • the droplets which are atomized by the injection and form a cloud of mist, can only be in the volume formed by the septum and thus can be localized in some way.
  • the movement of the droplets within the volume is still chaotic, but the droplets are essentially prevented by the septum from being outside the volume.
  • the volume which contains the droplets as mist. At least part of the air can be sucked out of the volume by means of a suction.
  • the air with the droplets sucked out of the volume forms a suction stream.
  • the suction also offers the advantage that the suction, in which the droplets are now, can be specifically treated further, for example, the suction can be fed to a filter system for cleaning. In this filter system, the droplets could be removed from the extracted air. Extracting and purifying the air, and thus preventing droplets from passing outside the volume formed by the septum, also allows work to take place in the vicinity of the spraying operation that is not affected by droplets escaping from the volume. In addition, it may be necessary to dispense with an otherwise necessary respiratory protection in the work taking place in the neighborhood.
  • At least one opening is formed in the septum, which forms a connection between inside and outside of the septum.
  • This opening allows an air supply from the outside of the septum to the inside of the septum.
  • a negative pressure is generated inside the volume formed by the septum.
  • air is sucked from the outside of the septum and transported into the volume. Since this suction is directed from the outside in the direction of the inside, it is additionally prevented that droplets can pass from the inside to the outside.
  • the droplets can only move in the air. Thus, they could also, if they are near the opening, only to the outside in the air that is present in the opening. However, this air is directed through the suction in the direction of the inside of the volume and thus breaks any droplets that would like to move to the outside, back into the volume, from where it is sucked with the air.
  • a suction opening is provided in the region of the volume. This suction opening is arranged at a first distance from the spray head of the propagation axis of the droplets and at a second distance perpendicular to the propagation axis of the droplets. At the suction opening, the suction is provided in such a way that the suction opening and the suction act together.
  • the spray head makes it possible, for example, to transport droplets onto a material to be coated, which is located opposite the spray head.
  • the droplets are atomized by the spray head and accelerated in the direction of the material to be coated.
  • the result is a jet, formed from air and droplets, which moves in the direction of the material to be coated and expands in this direction.
  • droplets that move outside of the beam and thus can not be used for the coating of the material.
  • an extraction opening is advantageously located at a first distance from the spray head in the propagation axis of the droplets and in arranged a second distance perpendicular to the propagation axis of the droplets and thus allows an unobstructed spattering of the surface in an advantageous manner.
  • a handle is attached to the spray device.
  • this handle facilitates holding and controlled movement of the sprayer during the injection process.
  • the spray device is coupled to a base station, which comprises an exhaust fan, at least one exchangeable filter unit, at least one valve element, at least one control element, at least one operating element, a material pressure vessel, at least one connection for compressed air and at least one connection for includes a mains voltage.
  • the spray head is provided with a roller system.
  • the spray device can be offset in parallel to the surface to be sprayed in an advantageous manner.
  • a distance between the septum and the surface can be adjusted and kept constant during movement.
  • a method for spraying with a spray device can during the spraying of droplets by means of a spray head to one spraying surface can be provided a septum, which prevents a propagation direction of the droplets.
  • the droplets collect on a side formed by the septum. This allows the droplets to be better localized.
  • the method for spraying with a spraying device comprises the suction of droplets from a volume formed by the septum and the spray head through a suction opening.
  • the suction opening is arranged at a first distance from the spray head in the propagation axis of the droplets and at a second distance perpendicular to the propagation axis of the droplets.
  • Fig. 1 shows a two-dimensional partial sectional view according to an advantageous embodiment of the present invention.
  • the surface 16 of a material 30 to be sprayed by means of the spray head 14, which can be, for example, the outer skin of an aircraft fuselage, can be seen.
  • the shape and surface condition of the material 30 can be arbitrary.
  • the spray head 14 has an injection direction, wherein the spray head with respect to the injection direction is arranged at a right angle to the material surface 16 in the septum 22 and the spray head 14 injects by means of compressed air droplets, z.
  • the spray head 14 is disposed in the septum 22, that it can be easily removed for cleaning and maintenance purposes from the septum 22 and accelerates the droplets in the direction of surface 16, resulting in a Color and air existing jet 2 forms whose diameter in the region of the spray head outlet 28 is smaller than the diameter in the region of the surface to be sprayed 16, which is perpendicular to the spray head, is.
  • the expansion of the jet is caused by turbulence effects on the exit of the droplets from the spray head 14 at the spray head outlet 28, so that the droplets essentially follow the indicated direction 20 on their way to the surface 16 to be sprayed.
  • nebulization area 12 is essentially limited by the propagating beam 2, the spray head 14 and the septum 22.
  • the septum 22 is bell-shaped and has in the region of the spray head 14 has a smaller diameter than in the vicinity of the surface 16 and thus contributes to the expansion of the beam 2 bill.
  • Droplets that are outside the jet 2 in the nebulization area 12 can no longer be used to treat the surface 16 and, because they often contain chromates and toxic solvents such as toluene, xylene, isocyanates, provide a mist of toxic waste. In order that this mist can not reach outside of the partition wall 22 and in order to prevent accumulating too much due to the further accumulating in the region 12 during spraying droplets, it is provided in the illustrated device that the mist located in the nebulization area 12 of droplets and Air is sucked through the opening 32.
  • the opening 32 in the septum is designed such that it has on the inside of the septum 22 a greater distance from the surface to be sprayed 16 than on the outside of the septum 22. This advantageously favors that the mist formed in the nebulization area 12 is sucked off. It follows the suction flow 26. This leads through the suction channel 10, which is formed between the inside and outside of the partition wall 22, to the suction opening 8, to which, for example, a suction hose is connected. In order to prevent that in the volume formed by the septum 22 through the suction creates a negative pressure, openings 4, 6 are provided for the supply of air. The incoming air 18, 24 replaces polluted air extracted from the volume.
  • the direction of movement of the supply air 18, 24 is directed into the interior of the volume formed by the partition wall 22 and prevents out of this area diffusing out of the nebula located in the nebulization area 12.
  • the openings for air supply 4, 6, for example, through slots in the Separating wall 22 but also be formed by attached to the partition 22 spacers 36.
  • Fig. 2 shows a two-dimensional schematic diagram of an embodiment of the present invention.
  • Fig. 2 shows how the spray device 50 is applied to the surface 16 to be sprayed.
  • the handle 34 can serve.
  • the connecting line 40 is used for material supply and the compressed air supply for the spray head 14.
  • the partially toxic droplets and air existing mist from the volume formed by the partition wall 22 is sucked through the suction line 38 from the spray device.
  • the Absaugsog generates a suction fan 44, which is housed in the base station 52.
  • the extracted from this partially poisonous mist is fed to the filter unit 48, in which it is cleaned.
  • the air is freed from the droplets, the droplets can be collected separately and the purified air, for example, can be returned to the ambient air.
  • exhaust fan 44 and filter unit 48 is located in the base station and a material pressure vessel 42 and control and operating elements.
  • the material pressure vessel 42 is connected to the material supply line 40 and supplies the spray device 50 and in particular the spray head 14 with the material to be sprayed and the pressure required for this purpose.
  • the combination of functions which are not directly required in the injection process in a base station becomes noticeable during the handling of the spraying device, since the spraying device is thereby considerably facilitated and thus, for example, can be moved more easily over the material surface 16.
  • the base station is mounted on wheels 46 which allows it to be moved to any location.
  • Fig. 3 shows a further schematic diagram of an embodiment according to the present invention. It illustrates how, by means of spacers 36, which are formed on the region of the separating wall 22 facing the material to be sprayed, a distance 4 is created between material surface 16 to be sprayed and septum 22, which serves to supply the supply air. Supply air flows through the gap 4 into the interior of the volume formed by the partition wall 22, since the exhaust fan 44 generates a negative pressure via the suction line 38 in the volume formed by the partition wall 22.
  • Exemplary of the various surface forms 16 to be treated is in Fig. 3 drawn a curved surface, as can occur, for example, in the outer skin of the fuselage of an aircraft.
  • Fig. 4 shows a flow chart for a method of spraying with a spray device.
  • a first step S 1 14 droplets are sprayed onto a surface 16 to be sprayed by means of a spray head. These droplets can spread more or less chaotically in the room. Therefore, in the next step S2, by providing a septum 22, a direction of propagation of the droplets is prevented. In order to prevent the droplets from collecting in a certain area, the droplets from this area, in particular from a volume formed by the partition wall 22 and the spray head 14, are sucked through a suction opening 32 in step S3.
  • the suction takes place at a first distance from the spray head 14 in the propagation axis of the droplets and at a second distance perpendicular to the propagation axis of the droplets.
  • the extracted air passes through a suction line 38 and a suction fan 44 in a filter unit 48, where it is cleaned and the ambient air without the partially poisonous droplets can be fed back.
  • Fig. 5 shows a further embodiment of a spray head 70 according to the present invention.
  • the spray head 70 has a bell-shaped spray capsule 72, which here has a rectangular cross section, in which the spray gun (not shown) injects the main jet.
  • the capsule 72 further comprises a roller system 74, which ensures a manual guidance of the spray head 70 parallel to the surface at a constant distance.
  • a roller system 74 which ensures a manual guidance of the spray head 70 parallel to the surface at a constant distance.
  • three different rollers arranged at the corners of a triangle may be provided.
  • handles 76 are provided.
  • For supplying the spray material or for sucking the suction air hoses 80 are provided.
  • Fig. 6 shows a propagation of an overspray cloud in free spraying with a spray gun according to the present invention and serves to further illustrate the invention.
  • the temporal development of the spray cloud is in the six pictures of the Fig. 6 from top left to bottom right.
  • the mass transfer is characterized less by gravity than by thermal or other flow processes of the environment. Ultimately, the overspray wanders around in the room and will precipitate in areas with almost no air circulation over a longer period of time. This can lead to a deteriorated surface of the job.
  • the basic principle of the mobile suction according to the present invention is to limit overspray propagation.
  • a small movable "spray booth" is created, as it were, in which the spraying or flow processes take place.
  • the capsule can be placed on the surface.
  • the capsule can then be hermetically sealed to the environment and it can be prevented leakage of the overspray from the capsule.
  • Fig. 7 shows a detailed view of a spray head 70 according to an advantageous embodiment of the present invention.
  • the spray head 70 has a Spray gun 90, which directs a jet of paint and air by means of a nozzle on the surface to be sprayed 96 '.
  • a suction channel 102 is provided which can be placed in the walls of the capsule 72 or on side walls of the capsule 72.
  • the suction channel 102 may then include a coupling 104 for fitting a suction tube, for example a tube 80 (FIG. Figure 5 ), exhibit.
  • roller system 74 In the presentation of Fig. 7 no roller system 74 is provided. However, in this embodiment, the provision of a roller system 74 is advantageous in order to ensure a defined gap 98 between the surface to be sprayed 96 'and an edge in the capsule. In addition, the roller system 74 allows easy movement of the spray head 70 parallel to the surface to be sprayed 96 '.
  • the overspray 94 As mentioned above, a majority of the overspray 94 is sucked up by means of the suction channel 102. However, part of the overspray remains in the volume of the capsule 72 and describes a circulation 96 which, however, has substantially no adverse effect on the quality of the job. The encapsulation of the circulation 96 in the capsule 72 also ensures that no droplets of the circulation 96 escape to the environment.
  • a blocking air 100 is sucked through the gap 98 into the suction channel 102.
  • the blocking air 100 from the outside and the overspray 94 collide at the inlet of the suction channel 102, which prevents propagation of the overspray 94 out of the capsule and only allows propagation of the overspray to the suction channel 102. In this way it is ensured that the Overspray essentially remains encapsulated in the capsule or is sucked out through the suction channel 102.
  • Fig. 8 shows a detailed view of a capsule 72 according to an embodiment of the present invention.
  • the reference numeral 110 designates an outer wall of the suction channel 102 which is provided between an outer wall 72 of the capsule and the outer wall 110 of the suction channel 102 according to this embodiment.
  • the suction opening of the suction channel 102 is provided in such a manner next to the air gap 98, that air is sucked through the suction channel 102 from the outside of the spray head and the capsule 72 and the overspray 94.
  • both air streams collide in front of the inlet of the suction channel 102 and are sucked by a negative pressure in the suction channel 102.
  • the outer wall 110, the suction channel 102 and the gap 98 can also be integrated or arranged in a suitable manner in the capsule 72 or in the walls of the capsule 72. Likewise, a plurality of suction channels can be provided. A suction arranged completely around the edge of the capsule may be advantageous.
  • FIGS. 9 and 10 show embodiments of suction according to the present invention.
  • the Absaugstirn- or gap surface by two U-profile frame 114 to design. External dimensions of the edges may be, for example 250 x 250 mm.
  • two handle bar 112 are also provided, wherein a distance between the handle bars should not be designed to narrow according to the desired capsule size or the target weight to ensure easy handling.
  • the U-profiles can be arranged at right angles and connected to each other by means of corner joints.
  • a traverse can be provided, which provides a structurally simple solution in conjunction with the corner joints and the U-profiles and ensures sufficient rigidity.
  • a traverse for example, in Fig. 10 can be provided between the brackets 112, be configured for attachment of the spray gun.
  • Fig. 11 shows a further embodiment of a spray head 70 according to the present invention.
  • four individual suction funnels 130 are provided, which, as previously with reference to FIGS. 9 and 10 has been described, are arranged in U-profiles.
  • the U-profiles are designated by the reference numeral 114.
  • handles or brackets 112 are provided, between which a traverse 118 is arranged, which is designed to hold the spray gun 90.
  • the reference numerals 116 designate control air scanners by means of which a control air can be adjusted.
  • the control air may be for example for the spray gun, but may for example also relate to the suction.
  • the reference numeral 72 in Fig. 11 refers to the capsule.
  • the configuration of the plexiglass capsule 72 is advantageous so that an operator can approach the injection center and control the injection process. For example, to ensure a defined gap of about 5 mm between the surface to be sprayed and the spray head 70 and to ensure the mobility between the spray head and the surface, rollers can be arranged at three points of the structure.

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Claims (4)

  1. Dispositif de pulvérisation destiné au revêtement de surfaces, le dispositif de pulvérisation comprenant :
    une cloison (22) ;
    une tête de pulvérisation (14 ; 70) avec une capsule de pulvérisation (72) en forme de cloche ;
    la tête de pulvérisation (14 ; 70) étant disposée dans la cloison (22) ;
    la tête de pulvérisation (14 ; 70) étant réalisée pour répartir des gouttelettes ;
    la cloison (22) étant réalisée pour freiner la diffusion des gouttelettes dans au moins une direction inopportune ;
    le dispositif de pulvérisation étant réalisé de telle sorte que, en cours de service, une partie des gouttelettes introduites dans le dispositif de pulvérisation décrit une circulation (96), encapsulée par la capsule de pulvérisation (72) ;
    le dispositif de pulvérisation étant manipulable manuellement ;
    la cloison (22) présentant un côté intérieur et un côté extérieur ;
    la cloison (22) réalisant un volume sur son côté intérieur avec une surface à asperger ;
    les gouttelettes étant injectées par la tête de pulvérisation (14, 70) dans le volume et le volume encapsulant les gouttelettes ;
    la cloison (22) présentant sur le côté intérieur un écartement plus élevé par rapport à une surface (16 ; 96') à asperger, que sur le côté extérieur ;
    au moins une ouverture (4, 6 ; 98) pour l'arrivée d'air étant réalisée dans la cloison (22) ;
    au moins une ouverture (4, 6 ; 98) créant une liaison entre le côté intérieur et le côté extérieur de la cloison (22) ;
    de l'air, qui se situe dans le volume, pouvant être aspiré au moins en partie au moyen d'une aspiration ; et l'air renfermant les gouttelettes sous forme de brouillard ;
    un canal d'aspiration (102) étant formé entre le côté intérieur et le côté extérieur de la cloison (22) ; et une fente (98) étant définie entre la surface (16 ; 96') à asperger et un bord de la capsule de pulvérisation (72) ;
    le dispositif de pulvérisation étant réalisé pour aspirer dans le canal d'aspiration (102), à l'entrée de ce dernier, un air de barrage (100) au travers de la fente (98), l'air de barrage de l'extérieur et un overspray (94) entrant en collision à l'entrée du canal d'aspiration (102), de sorte qu'une diffusion de l'overspray (94) hors de la capsule de pulvérisation (72) est jugulée,
    caractérisé en ce que
    la capsule de pulvérisation (72) est configurée en Plexiglas pour le contrôle de l'opération de pulvérisation, et
    présente un système de rouleaux (74), pour définir la fente (98) entre la surface (16) à asperger et un bord de la capsule de pulvérisation (72), le système de rouleaux (74) garantissant un guidage manuel de la tête de pulvérisation parallèlement à la surface (16) à asperger avec un écartement constant.
  2. Dispositif de pulvérisation selon la revendication 1,
    une ouverture d'aspiration (32) du canal d'aspiration (10) étant prévue dans la zone du volume ;
    l'ouverture d'aspiration (32) étant disposée à une première distance de la tête de pulvérisation (14) dans l'axe de diffusion (54) des gouttelettes ;
    l'ouverture d'aspiration (32) étant disposée à une seconde distance perpendiculairement à l'axe de diffusion (54) des gouttelettes ; et
    l'ouverture d'aspiration (32) coopérant avec l'aspiration.
  3. Dispositif de pulvérisation selon l'une des revendications 1 et 2,
    une poignée (34) étant montée sur le dispositif de pulvérisation (50) ; et
    la cloison (22) étant configurée en forme de cloche.
  4. Dispositif de pulvérisation selon l'une des revendications 1 à 3,
    le dispositif de pulvérisation (50) étant couplé à un poste de base (52),
    le poste de base (52) comprenant :
    un aspirateur (44) ;
    au moins une unité de filtration (48) interchangeable ;
    au moins un élément de soupape ;
    au moins un élément de commande ;
    au moins un élément de manipulation ;
    un réservoir sous pression de matériau (42) ;
    au moins un raccord pour un air comprimé ;
    au moins un raccord pour une tension de réseau.
EP05014898.0A 2004-07-09 2005-07-08 Dispositif de pulvérisation avec confinement des gouttelettes Active EP1614482B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58696604P 2004-07-09 2004-07-09
DE102004033338A DE102004033338B4 (de) 2004-07-09 2004-07-09 Spritzvorrichtung mit Tröpfchenrückhalt und Verfahren

Publications (2)

Publication Number Publication Date
EP1614482A1 EP1614482A1 (fr) 2006-01-11
EP1614482B1 true EP1614482B1 (fr) 2015-03-04

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EP05014898.0A Active EP1614482B1 (fr) 2004-07-09 2005-07-08 Dispositif de pulvérisation avec confinement des gouttelettes

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US (1) US7334742B2 (fr)
EP (1) EP1614482B1 (fr)
DE (1) DE102004033338B4 (fr)

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US10238257B2 (en) * 2013-03-06 2019-03-26 Brad Jareczek Vacuum attachment including a pressurized air source
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DE102015100002A1 (de) 2015-01-02 2016-07-07 Airbus Operations Gmbh Verbindungsstellenversiegelung
NL2014103B1 (nl) * 2015-01-09 2016-09-30 Stichting Quick Docking Spuitelement voor het aanbrengen van een verflaag op een wand.
EP3254765A1 (fr) * 2016-06-10 2017-12-13 Airbus Operations S.L. Élément d'aide au dépôt de fluide localise
MX2019011698A (es) 2017-03-31 2019-11-01 Arkema Inc Campana modular para recubrir recipientes de vidrio.
CN111587133B (zh) * 2018-01-23 2023-03-10 艾斯曲尔医疗公司 气雾剂发生器
KR102673983B1 (ko) * 2019-03-15 2024-06-12 주식회사 케이씨텍 기판 처리 장치
JP7194719B2 (ja) * 2020-10-28 2022-12-22 本田技研工業株式会社 材料層形成装置

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Also Published As

Publication number Publication date
DE102004033338B4 (de) 2010-12-09
US7334742B2 (en) 2008-02-26
DE102004033338A1 (de) 2006-02-16
US20060011747A1 (en) 2006-01-19
EP1614482A1 (fr) 2006-01-11

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