EP2189226B1 - Capuchon à air doté d'un dispositif d'orientation de l'air séparatement moulé et son méthode de fabrication avec moulage par injection - Google Patents

Capuchon à air doté d'un dispositif d'orientation de l'air séparatement moulé et son méthode de fabrication avec moulage par injection Download PDF

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Publication number
EP2189226B1
EP2189226B1 EP08020164.3A EP08020164A EP2189226B1 EP 2189226 B1 EP2189226 B1 EP 2189226B1 EP 08020164 A EP08020164 A EP 08020164A EP 2189226 B1 EP2189226 B1 EP 2189226B1
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EP
European Patent Office
Prior art keywords
air
cap
funnel
air cap
horn
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.)
Active
Application number
EP08020164.3A
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German (de)
English (en)
Other versions
EP2189226A1 (fr
Inventor
Alfred Göhring
Peter Ibele
Hermann Probst
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.)
J Wagner GmbH
Original Assignee
J Wagner GmbH
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Publication date
Application filed by J Wagner GmbH filed Critical J Wagner GmbH
Priority to EP08020164.3A priority Critical patent/EP2189226B1/fr
Priority to US12/620,694 priority patent/US20100123024A1/en
Publication of EP2189226A1 publication Critical patent/EP2189226A1/fr
Application granted granted Critical
Publication of EP2189226B1 publication Critical patent/EP2189226B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the invention relates to an air cap for the generation of an air stream with an atomized liquid according to the preamble of patent claim 1.
  • Liquids in particular paints for coating and for protecting surfaces, are applied to a surface in a known manner by means of spray guns.
  • spray guns for atomizing a paint liquid are known in a variety of different embodiments.
  • a color jet geometry For an effective homogeneous application of color to a surface, the usable range of a color jet geometry represents an important application criterion.
  • a preferred ink jet geometry for surface treatment is, for example, a flat-jet shape.
  • the required housing components, as well as the air and ink-carrying components of the spray gun, such as the paint nozzle with needle valve, the crank disk and the air cap with the air funnels are usually produced by injection molding, the air cap is made with the air funnels material ein Workshopig.
  • the invention has the task of avoiding the known disadvantages of the prior art and to further develop the production of an air cap with air funnels flexible and efficient.
  • the invention is characterized by the features of claim 1.
  • the invention is based on an air cap for generating an air flow with an atomized liquid, wherein the liquid via a liquid nozzle, preferably with Needle valve is atomized in the region of an air outlet opening of the air cap and the air cap comprises at least one air outlet opening which communicates with at least one downstream air funnel and forms a directed air jet.
  • the exiting, atomized liquid jet is changeable in its shape by an air jet emerging from the air funnel.
  • the essence of the invention is that the air funnel is manufactured as a separate element, in particular formed and can be connected to the air cap and that the air horn is formed as a foldable injection molding whose individual mold halves are connected by means of a film hinge with each other.
  • the air funnel is exchangeable as a separately manufactured element in a simple manner without changes to the air cap must be made.
  • the air hopper by means of a connecting means, for example a sliding guide on the surface of the air cap can be attached.
  • Such connecting elements for example dovetail guides or tongue-and-groove undercut structures, can be shaped in a simple manner, in particular by injection molding.
  • the air horn through an opening in the Air cap is inserted therethrough.
  • the connecting element can be formed on the air horn and on the air cap in a structurally simple manner, for example with a circumferential, conical collar collar which rests on the back of the air cap.
  • the connecting means of the air funnel forms a positive, preferably latching connection with the air cap.
  • a positive, preferably latching connection of the air horn with the air cap has the advantage that the air horn on the surface of the air cap can be fixed so that an undesirable shift or loss of the air horn during operation of the paint spray gun is avoided.
  • the air funnel has at least one air channel.
  • the formation of an air funnel with an air duct has the advantage that, for example, the air flow impinging on the formation of a color flat jet forms a reduced scatter compared to a baffle plate, thus enabling a precise alignment of the air flow on the color jet and the resulting ink jet forming.
  • the connecting means of the air funnel forms a coding.
  • an associated receptacle in the air cap can be adapted such that it has only one associated, coded on the recording connection element and thus a can record defined air funnel.
  • Injection molded element is formed, the individual mold halves are connected to each other by means of a film hinge.
  • an air funnel with individual mold halves has the advantage that the production of such an air funnel by injection molding can be substantially simplified.
  • an air passageway in the air horn is displaced from its spatial arrangement in the assembled air horn into a plane for simplified manufacture by injection molding.
  • the air duct in the air horn has a defined surface roughness.
  • the inner surface of the air channel has successive, semicircular depressions (golf ball principle) in order to improve the flow properties of the air flowing through.
  • the air duct in the air funnel is formed continuously and without edges.
  • An air flow flowing through the air duct can develop turbulences, jam or become too weak due to edges or sudden changes in direction. This is avoided by a corresponding uniform channel profile.
  • the formed by a film hinge air horn, integrally connected to a further film hinge is formed together with the air cap.
  • the arranged between the air horn and the air cap film hinge generates a captive and unmistakable overall component for a spray gun.
  • the invention is based on a method for producing an air cap, which communicates with at least one downstream air funnel and forms a directed shaped air jet.
  • At least one air horn is formed as a separate element and placed on the surface of an air cap by means of a connecting means.
  • the air funnel is produced in one piece with the air cap.
  • the air horn and / or the air cap is made by injection molding.
  • a conventional spray gun 1 for liquids which has a liquid container 2, a handle member 3 and at the front end of a gun housing 4, an air cap 5 with integrally arranged air funnels 6, wherein the air cap 5 by means of a union nut 19 on the gun housing is held.
  • a paint liquid passes by actuation of a pull lever 20 from a paint nozzle 12 (in FIG. 3 shown) and is in the range of a central Recess 10 of the air cap 5 atomized by means of outflowing air, wherein the air of the spray gun 1 is supplied continuously.
  • An atomized jet of color preferably has a circular area geometry without existing air funnels 6.
  • the air cap 5 is formed on its outwardly directed surface with two air funnels 6, 6a arranged diametrically opposite one another and integrally connected to the air cap, which are each penetrated by an air channel 8.
  • a stream of air emerging from the annular gap formed from the central recess 10 and the ink nozzle 12 generates an atomized jet of color with the emerging paint, which, starting from a conical geometry, is transformed by the laterally impinging air flow coming from the air funnels 6, 6a into a nearly linear flat jet becomes.
  • FIG. 2 a known from the prior art air cap 5 is shown with a union nut 19, wherein the air cap 5 has a central recess 10, which is traversed by the supplied air.
  • the integrally formed on the surface of the air cap 5 air horns 6, 6a each have a directed onto the atomized jet of paint air duct 8.
  • a further embodiment represents, for example, the arrangement of two superimposed air ducts 8, 8a in an air funnel 6, 6a, these being brought together, for example, in a common duct in the air funnel 6, 6a or through air flowing through separate ducts.
  • a link plate 11 is shown, which has a central recess with radially outwardly directed openings 20 and partially from the paint nozzle 12 is penetrated.
  • the openings 20 cooperate, for example, with the compensation openings and form a so-called "round jet operation" of the paint spray gun 1.
  • the openings 20 are brought into juxtaposition with the air channels 8, 8a of the air horns 6, 6a, whereby the equalization openings 7 on the air cap 5 are out of operation and a so-called "flat jet operation" of the paint spray gun 1 is formed.
  • FIG. 4 an inventive air horn 6 and 6a is shown, which is formed from two mold halves, which are interconnected by means of a film hinge 15.
  • the air funnel 6, 6a In the lower region, the air funnel 6, 6a, a connecting element 16, which is formed for example as a sliding guide and in a corresponding coded recording of air passage openings 13 (in FIG. 5 shown) on the air cap 5 can be inserted.
  • this On an obliquely downward surface of the air funnel 6, 6a, this has at least one air channel 8 for forming a flat jet.
  • the air funnel 6, 6a is formed by injection molding, wherein the spatial geometry of the air ducts 6, 6a is laid as a folding part with a film hinge in two mold halves in a plane due to the formation of the air funnel according to the invention.
  • FIG. 5 an air cap 5 according to the invention is shown, wherein this comprises a central recess 10, which is flowed through by the supplied air.
  • the air cap 5 On a radially outward surface position, the air cap 5 an air passage opening 13 which for a coded recording of the air funnel 6, 6a is formed via the connecting element 16.
  • Fig. 6 shows an air cap 5 from below, which is divided on its rear side by radially outwardly molded webs 18 into individual sections.
  • the compensation openings 7 and the air passage opening 13 for the air horn 6, 6 a are arranged.
  • the air horn 6, 6a is formed in the present embodiment with a sliding guide as a connecting element 16, wherein the air horn 6, 6a and the air cap 5 are formed as separate components, which must be assembled before proper use and possibly locked.

Landscapes

  • Nozzles (AREA)

Claims (13)

  1. Chapeau d'air (5) pour la production d'un flux d'air avec un liquide pulvérisé, le liquide étant pulvérisé par le biais d'une buse de liquide (12), de préférence avec une soupape à pointeau dans la zone d'une ouverture de sortie d'air du chapeau d'air (5), et le chapeau d'air (5) comprenant au moins une autre ouverture de sortie d'air qui est en liaison avec au moins un déflecteur d'air (6, 6a) monté en aval et réalise un jet d'air dirigé, le déflecteur d'air (6, 6a) étant formé en tant qu'élément séparé et pouvant être raccordé au chapeau d'air (5), caractérisé en ce que le déflecteur d'air est réalisé en tant qu'élément moulé par injection pliable dont les moitiés moulées individuelles sont raccordées l'une à l'autre au moyen d'un film-charnière.
  2. Chapeau d'air (5) selon la revendication 1, caractérisé en ce que le déflecteur d'air (6, 6a) peut, au moyen d'un moyen de raccordement (16), par exemple un guide de coulissement, être mis en place sur la surface du chapeau d'air (5).
  3. Chapeau d'air (5) selon une des revendications précédentes, caractérisé en ce que le déflecteur d'air (6, 6a) peut être inséré à travers un évidement dans le chapeau d'air (5).
  4. Chapeau d'air (5) selon une des revendications précédentes, caractérisé en ce que le moyen de raccordement (16) du déflecteur d'air (6, 6a) réalise un raccordement par liaison de forme, de préférence par encliquetage, avec le chapeau d'air (5).
  5. Chapeau d'air (5) selon une des revendications précédentes, caractérisé en ce que le déflecteur d'air (6, 6a) présente au moins une gaine d'air (8).
  6. Chapeau d'air (5) selon une des revendications précédentes, caractérisé en ce que le moyen de raccordement (16) du déflecteur d'air (6, 6a) réalise un codage.
  7. Chapeau d'air (5) selon une des revendications précédentes, caractérisé en ce que la gaine d'air (8) dans le déflecteur d'air (6, 6a) présente une rugosité de surface définie.
  8. Chapeau d'air (5) selon une des revendications précédentes, caractérisé en ce que la gaine d'air (8) dans le déflecteur d'air (6, 6a) est formée de façon continue et dépourvue d'arête.
  9. Chapeau d'air (5) selon une des revendications précédentes, caractérisé en ce que le déflecteur d'air (6) à la surface du chapeau d'air (5) peut être mis en place de façon symétrique par rapport à un autre déflecteur d'air (6a), l'ouverture de sortie d'air de la gaine d'air (8) étant dirigée vers le jet de liquide pulvérisé.
  10. Chapeau d'air (5) selon la revendication 1, caractérisé en ce que le déflecteur d'air (6, 6a) réalisé au moyen d'un film-charnière (15) est fabriqué d'un seul tenant avec un autre film-charnière en même temps qu'avec le chapeau d'air (5).
  11. Procédé pour la fabrication d'un chapeau d'air (5) avec des déflecteurs d'air (6, 6a) qui y sont disposés selon l'une des revendications 1 à 10, caractérisé en ce qu'au moins un déflecteur d'air (6, 6a) est formé en tant qu'élément moulé par injection pliable séparé et est disposé à la surface d'un chapeau d'air (5) au moyen d'un élément de raccordement (16).
  12. Procédé selon la revendication 11, caractérisé en ce que le déflecteur d'air (6, 6a) est fabriqué d'un seul tenant avec le chapeau d'air (5).
  13. Procédé selon une des revendications précédentes 11 et 12, caractérisé en ce que le déflecteur d'air (6, 6a) et le chapeau d'air (5) sont fabriqués selon le procédé de moulage par injection.
EP08020164.3A 2008-11-19 2008-11-19 Capuchon à air doté d'un dispositif d'orientation de l'air séparatement moulé et son méthode de fabrication avec moulage par injection Active EP2189226B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08020164.3A EP2189226B1 (fr) 2008-11-19 2008-11-19 Capuchon à air doté d'un dispositif d'orientation de l'air séparatement moulé et son méthode de fabrication avec moulage par injection
US12/620,694 US20100123024A1 (en) 2008-11-19 2009-11-18 Air cap with air director

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08020164.3A EP2189226B1 (fr) 2008-11-19 2008-11-19 Capuchon à air doté d'un dispositif d'orientation de l'air séparatement moulé et son méthode de fabrication avec moulage par injection

Publications (2)

Publication Number Publication Date
EP2189226A1 EP2189226A1 (fr) 2010-05-26
EP2189226B1 true EP2189226B1 (fr) 2013-09-11

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EP08020164.3A Active EP2189226B1 (fr) 2008-11-19 2008-11-19 Capuchon à air doté d'un dispositif d'orientation de l'air séparatement moulé et son méthode de fabrication avec moulage par injection

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US (1) US20100123024A1 (fr)
EP (1) EP2189226B1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105107653B (zh) 2009-01-26 2018-01-09 3M创新有限公司 液体喷枪、喷枪平台和喷头组件
JP6110313B2 (ja) 2011-02-09 2017-04-05 スリーエム イノベイティブ プロパティズ カンパニー 液体スプレーガン用のノズルチップ及びスプレーヘッドアセンブリ
CA2843266C (fr) 2011-07-28 2020-06-16 3M Innovative Properties Company Ensemble de tete de pulverisation a buse/capuchon d'air integre pour un pistolet de pulverisation de liquide
BR112014008900A2 (pt) 2011-10-12 2017-04-25 3M Innovative Properties Co conjuntos de cabeça de aspersão para pistolas de aspersão de líquido, pistola de aspersão e método de alteração de um núcleo de manuseio de líquido de um conjunto de cabeça de aspersão
CN104284736B (zh) 2012-03-06 2018-02-02 3M创新有限公司 具有内部提升通道的喷枪
CN104302409B (zh) 2012-03-23 2016-11-09 3M创新有限公司 具有不可分离喷嘴的喷枪圆筒
JP6449874B2 (ja) 2013-07-15 2019-01-09 スリーエム イノベイティブ プロパティズ カンパニー 液体スプレーガンのための面形状インサートを備える空気キャップ
MX2016016247A (es) 2014-06-10 2017-03-31 3M Innovative Properties Co Unidad de boquilla con deflectores externos.
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics

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GB482922A (en) * 1936-05-26 1938-04-07 Alexander Frederick Jenkins Improvements in spraying devices
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US5170941A (en) 1989-04-20 1992-12-15 Iwata Air Compressor Mfg. Co., Ltd. Premixing-type spray gun
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Publication number Publication date
EP2189226A1 (fr) 2010-05-26
US20100123024A1 (en) 2010-05-20

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