EP0897754B1 - Installation de revêtement par poudre avec un réservoir - Google Patents

Installation de revêtement par poudre avec un réservoir Download PDF

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Publication number
EP0897754B1
EP0897754B1 EP19980112620 EP98112620A EP0897754B1 EP 0897754 B1 EP0897754 B1 EP 0897754B1 EP 19980112620 EP19980112620 EP 19980112620 EP 98112620 A EP98112620 A EP 98112620A EP 0897754 B1 EP0897754 B1 EP 0897754B1
Authority
EP
European Patent Office
Prior art keywords
suction
air
powder coating
line
storage container
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.)
Expired - Lifetime
Application number
EP19980112620
Other languages
German (de)
English (en)
Other versions
EP0897754A2 (fr
EP0897754A3 (fr
Inventor
Rudolf Plenk
Rainer Spitzner
Felix Mauchle
Heinz HÖFLER
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.)
Gema Switzerland GmbH
Bayerische Motoren Werke AG
Original Assignee
Gema Switzerland GmbH
Bayerische Motoren Werke AG
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
Application filed by Gema Switzerland GmbH, Bayerische Motoren Werke AG filed Critical Gema Switzerland GmbH
Publication of EP0897754A2 publication Critical patent/EP0897754A2/fr
Publication of EP0897754A3 publication Critical patent/EP0897754A3/fr
Application granted granted Critical
Publication of EP0897754B1 publication Critical patent/EP0897754B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B05B7/14—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 designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • 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
    • B05B7/14—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 designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1472—Powder extracted from a powder container in a direction substantially opposite to gravity by a suction device dipped into the powder

Definitions

  • the invention relates to a device in the preamble of the first claim specified type.
  • Storage containers according to the invention are usually containers, that are in the immediate vicinity of a paint booth.
  • the powder is through the supply of a fluid, usually compressed air, in suspension in the reservoir held.
  • a fluid usually compressed air
  • the fluidized powder is then injected from the storage container with the aid of an injector conveyed a powder hose that opens into the application nozzle
  • a disadvantage of the known way of removing the excess air from the fluidization consists in the fact that the removal of air cannot be precisely regulated. If too much air is sucked out, too much powder coating is entrained. Is not enough Aspirated air, there is a risk of deposits in the suction hose the pressure conditions change, which ultimately leads to excess pressure in the reservoir leads.
  • the object of the present invention is to remedy this and a suction system to propose on a reservoir for powder coating systems, with where the pressure difference to the environment is kept close to zero without fluctuations can be.
  • This storage container 1 is constructed commercially, i.e. H. on its bottom area has an inlet 2 for compressed air to inside to keep the existing powder in suspension.
  • a commercially available injector 3 is arranged, which with a powder hose 4 is connected to that for coating the workpieces remove the necessary air-powder mixture from the storage container.
  • the compressed air supplied is discharged from the storage container 1.
  • This will a vent line 5 is required, which is in the upper region of the storage container 1 protrudes. Its protruding end protrudes into an intake funnel 6 of an extraction system 7.
  • This suction system 7 is connected to a suction line 8 which opens into the spray booth in a manner known per se.
  • the suction funnel 6 belongs to an air quantity booster, a so-called Airmover that works according to the Coanda effect. Ordinary is used as the drive Compressed air, which is fed via a feed line 9 into an annular chamber. Here the compressed air is pressed through an annular gap, where through a thin layer of air high speed arises on the inner contour of the air volume booster. The flow of compressed air is thus directed in the n direction onto the suction line 8. Because of the high-speed flow in the air volume booster Air causes a pressure drop in the suction funnel 6, which causes large amounts of ambient air be sucked in. At the same time, the vent line 5 excess air is sucked in from the fluidization. However, the suction pressure is in the vent line 5 not so large that noticeable amounts of powder coating particles get carried away.

Landscapes

  • Nozzles (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (3)

  1. Installation de revêtement par poudre avec un réservoir d'alimentation (1) comprenant une conduite d'amenée (2) pour un fluide, en particulier de l'air, ainsi qu'un injecteur (3) pour prélever de la peinture en poudre fluidisée et une conduite d'aspiration (8),
    caractérisée en ce qu'
    il est prévu à la partie supérieure du réservoir d'alimentation (1) une conduite d'aération (5) dont l'extrémité ouverte est reliée à la conduite d'aspiration (8) en débouchant dans un entonnoir d'aspiration (6) de l'installation d'aspiration (7).
  2. Installation de revêtement par poudre selon la revendication 1,
    caractérisée en ce que
    l'installation d'aspiration (7) est configurée en amplificateur de débit.
  3. Installation de revêtement par poudre selon la revendication 1 ou 2,
    caractérisée en ce que
    le rapport de la surface de l'entonnoir d'aspiration (6) au niveau de l'extrémité de la conduite d'aération (5), diminuée de la surface de section de l'extrémité de cette conduite (5), rapportée à cette dernière surface, a une valeur comprise entre 1,5 et 3.
EP19980112620 1997-08-21 1998-07-08 Installation de revêtement par poudre avec un réservoir Expired - Lifetime EP0897754B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997136326 DE19736326C1 (de) 1997-08-21 1997-08-21 Vorratsbehälter für Pulverlackanlage
DE19736326 1997-08-21

Publications (3)

Publication Number Publication Date
EP0897754A2 EP0897754A2 (fr) 1999-02-24
EP0897754A3 EP0897754A3 (fr) 2000-10-25
EP0897754B1 true EP0897754B1 (fr) 2003-09-17

Family

ID=7839677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980112620 Expired - Lifetime EP0897754B1 (fr) 1997-08-21 1998-07-08 Installation de revêtement par poudre avec un réservoir

Country Status (3)

Country Link
EP (1) EP0897754B1 (fr)
DE (1) DE19736326C1 (fr)
ES (1) ES2206798T3 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2453753C3 (de) * 1974-11-13 1982-05-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Bogenbremse
GB2118512B (en) * 1982-04-21 1986-08-06 Ace Nylon Conveyor for particulate material
US4730647A (en) * 1986-12-08 1988-03-15 Nordson Corporation Powder feeder apparatus
US5017324A (en) * 1986-12-08 1991-05-21 Nordson Corporation Method for depositing particulate material into a pad of fibrous material in a forming chamber
DE3827014A1 (de) * 1988-04-14 1989-10-26 Erich Kraemer Verfahren und vorrichtung zum zufuehren eines pulverfoermigen materials zu einer versorgungseinrichtung
DE3920635A1 (de) * 1989-06-23 1991-01-03 Wagner Int Einrichtung zum fluidisieren und abfoerdern von pulver

Also Published As

Publication number Publication date
DE19736326C1 (de) 1998-09-17
EP0897754A2 (fr) 1999-02-24
EP0897754A3 (fr) 2000-10-25
ES2206798T3 (es) 2004-05-16

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