[go: up one dir, main page]

EP0453745B1 - Méthode et dispositif pour nettoyage intérieur d'un conduit amenant de la poudre, en particulier un tuyau souple d'un dispositif pour le revêtement par poudrage électrostatique - Google Patents

Méthode et dispositif pour nettoyage intérieur d'un conduit amenant de la poudre, en particulier un tuyau souple d'un dispositif pour le revêtement par poudrage électrostatique Download PDF

Info

Publication number
EP0453745B1
EP0453745B1 EP91103603A EP91103603A EP0453745B1 EP 0453745 B1 EP0453745 B1 EP 0453745B1 EP 91103603 A EP91103603 A EP 91103603A EP 91103603 A EP91103603 A EP 91103603A EP 0453745 B1 EP0453745 B1 EP 0453745B1
Authority
EP
European Patent Office
Prior art keywords
powder
granules
granule
container
air current
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
EP91103603A
Other languages
German (de)
English (en)
Other versions
EP0453745A1 (fr
Inventor
Peter Brielmaier
Manfred Schüler
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
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 J Wagner GmbH filed Critical J Wagner GmbH
Publication of EP0453745A1 publication Critical patent/EP0453745A1/fr
Application granted granted Critical
Publication of EP0453745B1 publication Critical patent/EP0453745B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids

Definitions

  • the invention relates to a method and a device for cleaning the inside of a powder-carrying line, in particular a hose line, of an electrostatic powder coating system, in particular in the event of a color change.
  • the powder-carrying connecting lines in particular powder hoses
  • the powder hoses have so far only been cleaned to a greater or lesser extent by blowing compressed air through them.
  • the powder of the new color must then first be sprayed "into the void", but this also offers no security and is understandably uneconomical. In practice, therefore, the procedure is usually that the powder hoses are changed when the color changes such that there is a separate hose for each color type.
  • the object of the present invention is therefore to provide a simple, quick to carry out and nevertheless very effective method for cleaning the inside of powder-carrying lines without having to dismantle the lines on the spray guns or on the automatic movement machines carrying the spray guns. This object is achieved from the features of claims 1 and 5.
  • the internal cleaning of the powder-carrying lines takes place in that granules are passed through the line to be cleaned at a comparatively high speed. It is then only necessary to dismantle the line from the powder supply container and connect it to a granule supply, whereas dismantling the line on the spray gun or on the automatic machine is superfluous because the granules are discharged by the spray gun, the powder-carrying lines of which are also cleaned.
  • the lines containing powder residues are remarkably effectively cleaned by the granules which are passed through, the powder carried by the granules during this cleaning being able to be separated off in a simple manner and can be reused.
  • 10 denotes a storage container for the granules used for cleaning.
  • an inclined sieve 11 which, on the one hand, serves to feed the granules to an injector 12 attached to the container outlet and, on the other hand, to separate out granules of small grain size.
  • the injector 12 is connected on the one hand to a compressed air supply 13, while its outlet, for example by means of a quick coupling, can be connected to the powder supply hose 15 of a powder spray gun 16 to be cleaned.
  • the gun 16 its powder feed hose 15 is connected to a powder feed (not shown), for example the injector of a powder supply and processing container. If the hose 15 is now to be cleaned for a color change, the hose 15 is removed from the injector of the powder container and mounted at the outlet of the injector 12. If compressed air is now supplied to the injector 12 through the line 13, the injector 12 removes 10 granules from the granule container and passes a granule-air mixture through the hose line 15 into the spray gun 16, which delivers the granule-air mixture in the spraying direction.
  • the nozzle part of the spray gun 16 is preferably removed for this cleaning phase, especially if it is a nozzle part with a baffle.
  • a simple return hose 17 is attached to the front part of the gun, with a cyclone-like strainer basket in the form of a wire basket 18 arranged at its free end to which a separation air nozzle 20 connected to a compressed air supply 19 and a granulate collecting container 21 are assigned.
  • the granulate-powder-air mixture emerging from the return hose 17 passes into the wire basket 18 and is separated there by the separating air emerging from the nozzle 20, such that the granulate falls down into the collecting container 21, whereas the compressed air and the the powder they carry to a powder filter (not shown) or to the usual cabin cleaning filter, where the powder is separated from the air and recycled.
  • the compressed air supply lines 13 and 19 are switched off and the powder hose 15 is removed from the injector 12 and connected to the supply line for the new powder of the next coating process.
  • the granules are preferably plastic granules that generate as little friction as possible, for example from polyamide granules.
  • the grain size of the granules should be between 1 and 3 mm, preferably 1.5 mm.
  • the amount of air used to transport the granules is preferably about a power of ten above that usually used for powder coating. In practice, this is achieved in a simple manner in that the injector 12 is fed directly from the compressed air network, which usually has a pressure of 7 bar, that is to say without the interposition of a pressure reducer, and by using an injector nozzle which is larger in comparison to powder coating; for powder coating, as is known, the network pressure mentioned for feeding the powder injector is considerably reduced.
  • the granule density in the granule-air stream passing through the hose to be cleaned can be chosen such that there are distances between the individual granules; the granules do not move "laminar” within the tube, but rather carry out irregular ("prancing and helical") forward movements so that they are thrown on their way from one side of the hose wall to another side of the hose wall and thereby remove powder residues from the inner wall of the hose.
  • the injector 12 attached to the container 10 for the granulate, as well as the wire basket 18 for the return of the granulate, can be designed so that several hoses can be connected to it at the same time, so that several systems can be cleaned at the same time.
  • the sieve basket 18 can also have a different shape and form for separating the granules and recycling them.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Spray Control Apparatus (AREA)
  • Coating Apparatus (AREA)

Claims (7)

  1. Procédé de nettoyage intérieur d'une conduite véhiculant de la poudre, en particulier une conduite souple, d'une installation de poudrage électrostatique, en particulier dans le cas d'un changement de couleur, caractérisé par le fait qu'après la phase de revêtement un courant d'air comprimé chargé de granules traverse la conduite, la vitesse du courant granules-air dépassant considérablement celle du courant poudre-air de la phase de revêtement et la grosseur des granules dépassant considérablement celle des particules de poudre, et par le fait que les granules sont séparés du courant d'air comprimé et sont débarrassés de la poudre qu'ils ont entraînée après leur sortie de la conduite.
  2. Procédé selon la revendication 1, caractérisé par le fait que la quantité d'air par unité de temps du courant granules-air est supérieure d'un facteur 10 à celle du courant poudre-air de la phase de revêtement, et par le fait que l'on utilise des granules d'une grosseur comprise entre 1 et 3mm et de préférence de 1,5mm.
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que les granules en plastique utilisés sont de préférence des granules de polyamide.
  4. Procédé selon l'une quelconque des revendications 1 à 3 pour le nettoyage intérieur d'un tuyau reliant un réservoir de poudre à un pistolet pulvérisateur, caractérisé par le fait que le tuyau est retiré du réservoir de poudre et raccordé à une alimentation en granules, et par le fait que la buse du pistolet pulvérisateur est remplacée par un tuyau de retour, la séparation des granules, du courant d'air comprimé, étant effectuée après la sortie du tuyau de retour.
  5. Dispositif permettant la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 4, avec un réservoir de granules (10) à la sortie duquel un injecteur alimenté en air comprimé (12) est raccordé à la sortie avec un raccord en tuyau souple et avec un panier en toile métallique de forme cyclonaire (18) avec buse d'alimentation en air comprimé (20) et bac récepteur de granules (21).
  6. Dispositif selon la revendication 5, caractérisé par le fait qu'un tamis (11) descendant en oblique vers la sortie du réservoir (10) est disposé dans ce dernier.
  7. Dispositif selon la revendication 5 ou 6, caractérisé par la présence d'un tuyau de retour (17) entre le pistolet pulvérisateur (16) et le panier en toile métallique (18).
EP91103603A 1990-04-24 1991-03-08 Méthode et dispositif pour nettoyage intérieur d'un conduit amenant de la poudre, en particulier un tuyau souple d'un dispositif pour le revêtement par poudrage électrostatique Expired - Lifetime EP0453745B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013060A DE4013060C1 (en) 1990-04-24 1990-04-24 Removing powder from spray gun tubing - by blowing down compressed air plus granules of larger particle size than powder and blowing at speed equal to air-powder draught
DE4013060 1990-04-24

Publications (2)

Publication Number Publication Date
EP0453745A1 EP0453745A1 (fr) 1991-10-30
EP0453745B1 true EP0453745B1 (fr) 1994-05-25

Family

ID=6404984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103603A Expired - Lifetime EP0453745B1 (fr) 1990-04-24 1991-03-08 Méthode et dispositif pour nettoyage intérieur d'un conduit amenant de la poudre, en particulier un tuyau souple d'un dispositif pour le revêtement par poudrage électrostatique

Country Status (4)

Country Link
US (1) US5170591A (fr)
EP (1) EP0453745B1 (fr)
JP (1) JPH0665388B2 (fr)
DE (2) DE4013060C1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4417727A1 (de) * 1994-05-20 1995-11-23 Gema Volstatic Ag Schlauchbürste
JPH07313922A (ja) * 1994-05-24 1995-12-05 I T M Kk 色替用気体搬送粉体供給システム
DE4420579A1 (de) * 1994-06-03 1995-12-07 Meyer & John Gmbh & Co Verfahren zum Reinigen von Rohrleitungen
US6223997B1 (en) 1998-09-17 2001-05-01 Nordson Corporation Quick color change powder coating system
DE29819052U1 (de) * 1998-10-26 2000-03-02 J. Wagner Gmbh, 88048 Friedrichshafen Fördervorrichtung
US6112999A (en) 1998-11-13 2000-09-05 Steelcase Development Inc. Powder paint system and control thereof
US6705545B1 (en) 1998-11-13 2004-03-16 Steelcase Development Corporation Quick color change powder paint system
US7325750B2 (en) * 2000-10-05 2008-02-05 Nordson Corporation Powder coating system with improved overspray collection
US6695220B2 (en) 2001-01-11 2004-02-24 Herman Miller, Inc. Powder spray coating system
US20050178851A1 (en) * 2001-06-25 2005-08-18 Nordson Corporation Quick change powder coating spray system
JP5410720B2 (ja) 2008-09-25 2014-02-05 日立コンシューマエレクトロニクス株式会社 ディジタル情報信号送受信装置、およびディジタル情報信号送受信方法
CN102145340A (zh) * 2010-11-23 2011-08-10 瓮福（集团）有限责任公司 一种列管加热器的机械清理方法
JP6265503B2 (ja) * 2015-05-25 2018-01-24 株式会社 サン・テクトロ プリプレグ製造装置
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics
CN113578567B (zh) * 2021-08-06 2022-08-23 宁波宇晓包装有限公司 一种具有抗菌性、耐老化、高强度喷枪生产工艺

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US818776A (en) * 1905-05-05 1906-04-24 John D Murray Sand-blast apparatus.
US3667675A (en) * 1971-02-16 1972-06-06 Graco Inc Electrostatic powder coating apparatus
US4044507A (en) * 1976-05-12 1977-08-30 Silver Creek Minerals Corporation Method and apparatus for stripping, cleaning and treating surfaces
US4412402A (en) * 1978-07-28 1983-11-01 Cavitron Inc. Equipment and method for delivering an abrasive-laden gas stream
DE2849269C2 (de) * 1978-11-14 1980-11-27 Gema Ag, Apparatebau, St. Gallen (Schweiz) Verfahren zum Pulversprühen und pneumatische Pulversprüheinrichtung
DE2930121C2 (de) * 1979-07-25 1982-05-27 Gema AG Apparatebau, 9015 St. Gallen Verfahren und Einrichtung zum Sprühbeschichten von Gegenständen mit Pulver
US4248379A (en) * 1979-08-16 1981-02-03 Nordson Corporation Powder spray color change system
GB2073630B (en) * 1980-04-12 1983-03-16 Ogle & Sons Ltd G C Sand-blasting equipment
DE3028588C2 (de) * 1980-07-28 1982-05-27 Gema AG Apparatebau, 9015 St. Gallen Pulver-Beschichtungsanlage
US4452169A (en) * 1982-09-24 1984-06-05 Shinich Matsuda Reviving apparatus for fluid passages
DE3408828A1 (de) * 1984-03-10 1985-09-12 Rudolf 4834 Harsewinkel Ristow Verfahren zum reinigen von oberflaechen, insbesondere von inneren oberflaechen lueftungstechnischer anlagen und anlagenteile
US4773189A (en) * 1985-11-01 1988-09-27 Macmillan Gregory D Separation system for polymeric blast media
GB8527244D0 (en) * 1985-11-05 1985-12-11 Roberts G S Cleaning spray painting guns
DE8803364U1 (de) * 1988-03-12 1988-05-05 Bloch, Klaus, 5205 St Augustin Strahlmittel aus thermoplastischem Kunststoff
US5011443A (en) * 1990-01-02 1991-04-30 Zenith Electronics Corporation Cleaning of flat glass CRT faceplate with internal anti-glare surface

Also Published As

Publication number Publication date
JPH0665388B2 (ja) 1994-08-24
EP0453745A1 (fr) 1991-10-30
US5170591A (en) 1992-12-15
DE4013060C1 (en) 1991-11-21
JPH0584453A (ja) 1993-04-06
DE59101699D1 (de) 1994-06-30

Similar Documents

Publication Publication Date Title
EP0453745B1 (fr) Méthode et dispositif pour nettoyage intérieur d'un conduit amenant de la poudre, en particulier un tuyau souple d'un dispositif pour le revêtement par poudrage électrostatique
DE69829571T2 (de) Verbesserungen zur pulversprühbeschichtung
DE69431169T2 (de) Pulverbeschichtungssystem
DE60318947T2 (de) Verwendung einer Vorrichtung zum Aufbringen eines pulverförmigen Flussmittels
DE69115689T2 (de) Pulverbeschichtungssystem
EP0141778B1 (fr) Installation puor le revêtement électrostatique par poudre
EP0044310B2 (fr) Installation de revetement de pieces d'oeuvre par poudre comportant une cabine pour recevoir temporairement la piece d'oeuvre
EP0349490B1 (fr) Procédé et dispositif de préparation de granulés
DE2318772B2 (de) Verfahren und kabine zur elektrostatischen bepulverung
DE102012108907B4 (de) Verfahren und Vorrichtung zum Entstauben von Schüttgütern mittels Ionisierung
DE2419925A1 (de) Pulverspritzkabine
DE2546920C3 (de) Elektrostatische Pulver-Beschichtungsanlage
EP0606577B1 (fr) Dispositif de revêtement de poudre par pulverisation
DE19709589C2 (de) Fließbettapparatur zum Behandeln von partikelförmigem Gut
EP0777534B1 (fr) Dispositif de mise en peinture de pieces par pulverisation
EP0678059B1 (fr) Dispositif collecteur pour recueillir la peinture pulverisee en exces dans des cabines de pulverisation
DE102007005309A1 (de) Pulversprühbeschichtungsanlage und Pulversprühbeschichtungsverfahren
DE4013063C1 (fr)
EP0913204A1 (fr) Méthode et appareil de revêtement par poudre
EP1080789B1 (fr) Unité de récupération de poudre
EP2498918B1 (fr) Utilisation et procédé pour éviter des dépôts dans des installations de revêtement
DE2235752A1 (de) Pulverspruehvorrichtung
EP0455111A1 (fr) Installation pour revêtir en série des pièces d'oeuvre d'un matériau de revêtement conducteur
EP0476464B1 (fr) Procédé pour éliminer des particules suspendues dans un gaz et solubles dans des liquides
CH617871A5 (en) Electrostatic powder-coating system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19911022

17Q First examination report despatched

Effective date: 19930715

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19940525

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940525

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940525

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940601

REF Corresponds to:

Ref document number: 59101699

Country of ref document: DE

Date of ref document: 19940630

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950308

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950308

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19991230

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20000313

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010331

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020101