EP0689875A2 - Dispositif pneumatique pour transporter de la poudre, notamment de la poudre de revêtement - Google Patents

Dispositif pneumatique pour transporter de la poudre, notamment de la poudre de revêtement Download PDF

Info

Publication number
EP0689875A2
EP0689875A2 EP95108877A EP95108877A EP0689875A2 EP 0689875 A2 EP0689875 A2 EP 0689875A2 EP 95108877 A EP95108877 A EP 95108877A EP 95108877 A EP95108877 A EP 95108877A EP 0689875 A2 EP0689875 A2 EP 0689875A2
Authority
EP
European Patent Office
Prior art keywords
powder
compressed air
air
material block
air channel
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.)
Withdrawn
Application number
EP95108877A
Other languages
German (de)
English (en)
Other versions
EP0689875A3 (fr
Inventor
Guido Rutz
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
Original Assignee
Gema Switzerland 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 Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Publication of EP0689875A2 publication Critical patent/EP0689875A2/fr
Publication of EP0689875A3 publication Critical patent/EP0689875A3/fr
Withdrawn legal-status Critical Current

Links

Images

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 conveying device for powder, in particular coating powder, according to the preamble of claim 1.
  • a pneumatic conveyor device of this type is known from DE-OS 41 14 097 A1. It can be immersed in a container in order to suck up coating material from it and convey it in a compressed air stream to a powder receiver.
  • the powder receiver can be another container or a spray device for spraying the powder onto an object to be coated.
  • the powder container can be a so-called container in which the powder manufacturer supplies coating powder to companies which spray the powder onto objects to be coated and then melt it on the object by the action of heat.
  • the powder container can consist of cardboard, metal, plastic or a sack, for example a plastic sack.
  • the sack can be stored in a stable container. Powder can only be conveyed pneumatically if it is very loose or "fluidized".
  • Fluidized means that the powder particles are suspended in air. They behave like a liquid so that they can be sucked into a conveying air stream by vacuum. Elements for fluidizing the powder can be found at the lower end of the device be made of porous material, from which compressed air flows into the powder in the powder container and fluidizes the powder.
  • powder containers are known which have a perforated intermediate floor, through which compressed air flows from bottom to top into the container and thereby fluidizes powder located therein.
  • such containers which have a fluidizing base, are too expensive as containers and require an additional compressed air connection on their base. So they can only be used if the container is emptied into them beforehand. However, this is not only an additional expenditure of time, but also causes problems due to whirling powder.
  • a vibrator can be used which vibrates the powder container and thereby loosens the powder in it.
  • the conveying devices require at least two fluid lines, one of which serves to supply compressed air as conveying air to an injector nozzle, and the other serves to convey the powder to a receiver by means of the conveying air flowing out of the injector nozzle.
  • another injector for additional air is arranged downstream of the injector, which conveys additional air into the powder-air duct, with which the flow rate of the powder-air mixture can be regulated.
  • a further fluid line for compressed air may be required, by means of which compressed air is driven through it for flushing the powder-air line.
  • the fluid lines interfere with the movements of the conveying device when immersed in the powder container and when it is subsequently moved out of the powder container. When changing from one type of powder to another type of powder, possibly of a different powder color, the conveyor must be cleaned thoroughly.
  • the aim of the invention is to achieve the object of designing the conveying device as a compact structural unit, by means of which the effort for cleaning when changing the powder is reduced in terms of time, material and personnel, which is inexpensive to manufacture and in which all the hoses required as fluid lines are parallel to one another extend in the direction of the longitudinal axis of the injector from the immersion device, so that there are no deflections of the powder-air flow which would lead to material wear in the flow path.
  • the conveyor device according to the invention for powder, in particular coating powder for spray coating objects consists of several, for example 16, vertically parallel dipping devices 1 to 16 and a positioning device 18 which has at least one at least vertically movable positioning arm 20, on which the upper end portions of the diving devices 1 to 16 are secured by jaws 21, 22, 23.
  • the positioning device 18 can be a lifting device or a robot. In the case of a robot, the robot arm can be adjusted in any direction together with the diving devices 1 to 16. In all cases, the immersion bodies 1 to 16 can be immersed by means of the movable positioning arm 20 in a powder container 24, which is indicated schematically in FIG.
  • the powder container 24 can be a container by means of which the powder is supplied by the powder manufacturer to a company.
  • Each diving device 1 to 16 is a vertically elongated, inherently dimensionally stable body which can be immersed from top to bottom in a powder container 24, the lower end of the diving device 1 to 16 remains on the powder 28 and its surface sinks into the powder container 24 or dips into the powder 28. The upper end of the immersion device 1 to 16 always protrudes upward out of the powder container 24.
  • FIGS. 2, 3 and 4 The lower section 26 of the diving device 9 enclosed in a circle in FIG. 1 is shown in FIGS. 2, 3 and 4 on a scale of 1: 1. All diving devices 1 to 16 are of identical design. They are described in more detail below with reference to drawings 2, 3 and 4.
  • each diving device 1 to 16 is formed by a one-piece or multi-piece material block 30, which contains an injector 32.
  • the part of the dipping device located above the material block 30 essentially consists of a first compressed air pipe 34 for the supply of conveying air, a second compressed air pipe 36 for the supply of additional air and a third compressed air pipe 38 for the supply of purge air, each in the material block 30.
  • the lower ones End sections of the three compressed air pipes 34, 36, 38 are screwed into threaded bores 35, 37, 39 of the material block 30.
  • the upper end sections of the compressed air pipes 34, 36, 38 are provided above the positioning arm 20 holding them with fluid connection elements 40, through which compressed air hoses 42 are connected.
  • the fluid connection elements 40 and the end sections of the compressed air hoses 42 connected to them all run parallel to one another and axially to the compressed air pipes 34, 36 and 38 connected to them.
  • the individual immersion devices 1 to 16 can also be referred to as immersion lances. They have a rod-like elongated shape and a length which is greater than the immersion depth in the powder container 24.
  • the injector 32 has an injector nozzle 44, which is screwed into a vertical through bore 47 of the material block 30 from an end-facing outer surface 46 of the material block 30 and is directed axially into a powder-air channel 48 located directly above it.
  • the powder-air channel is formed in a tube 49 which is screwed into the through hole 47 from top to bottom and initially has a circular cylindrical and subsequently a funnel-like channel section in the flow direction of the powder-air stream.
  • a powder suction opening 52 is formed by a short straight bore, which extends from the downward-facing outer surface 46 of the diving head 30 obliquely to the vertical direction upwards into a vacuum chamber 54, which between the injector nozzle 44 and the powder-air channel 48 in FIG Through hole 47 is formed.
  • Compressed air from the first compressed air tube 34 flows through an axially downwardly extending vertical bore 56 and then through transversely extending horizontal bores 57 and 58 of the material block 30 as conveying air into the injector nozzle 44 and from there into the powder-air channel 48, being in the vacuum chamber 54 creates a vacuum and thereby sucks powder 28 out of the powder container 24 through the suction opening 52 and conveys it through the powder-air channel 48.
  • the powder-air channel 48 is connected to a powder-air line 60 leading axially upward away from it, which is preferably a hose and leads to a powder receiver, which is not shown.
  • the powder-air line 60 could be designed as a tube up to the positioning arm 20 and only then as a hose, corresponding to the compressed air lines 9 to 18 and 42. All hoses 42 and 60 can be continued horizontally after the initial vertical section shown in the drawings via a guide device 61.
  • the amount of powder conveyed per unit of time depends on the strength of the vacuum in the vacuum chamber 54 and thus on the pressure and the flow rate of the conveying gas of the injector nozzle 44.
  • the more conveying air is conveyed the more powder 28 is sucked into the conveying air flow.
  • a certain minimum flow rate is required so that no powder can be deposited in the powder-air line 60.
  • the flow rate can be increased while the powder delivery rate is kept constant by adding additional air from the second compressed air tube 36 via horizontal bores 62 and 64, which are formed in the material block 30, and adjoining the flow with a short distance downstream of the injector nozzle 44 into the powder Air channel 48 opening oblique nozzle bores 66, is blown into this powder-air channel 48.
  • the powder-air flow in the powder-air line 60 then consists of conveying air, additional air and powder.
  • the horizontal bores 62 and 64 for the additional air are also connected in terms of flow via an extension 65 of the one bore 62 to the third compressed air tube 38, so that compressed air from the third compressed air tube 38 as purge air through the oblique bores 66, which act as additional air nozzles in normal powder conveying operation , can be driven into the powder-air channel 48 and from it through the powder-air line 60 in order to flush out powder residues therefrom.
  • Such cleaning of the powder-air channel 48 and the powder-air line 60 connected to it becomes necessary at least whenever a different type of powder is to be conveyed then there are no coating errors caused by powder mixtures.
  • Powder can only be conveyed out of a powder container 24 if it is "fluidized”. So that powder can also be conveyed from containers or containers 24 which do not have their own fluidizing device, at least one fluidizing body 70 is screwed onto the downward-facing outer surface 46 of the material block 30, which has a plurality of narrow passage openings or consists of an air-permeable porous material and is in flow connection via a vertically extending throttle duct 72 of the material block 30 with the vertical bore 56 arranged axially above it, to which the first compressed air pipe 34 is connected.
  • the compressed air tube 34 thus supplies the conveying air for the injector 32 and also fluidizing air for the fluidizing body 70.
  • the fluidizing body 70 projects downward beyond the material block 30.
  • Compressed air from the compressed air tube 34 flows as fluidizing air through the throttle duct 72 and then through the fluidizing body 70 into the powder 28 of the powder container 24.
  • the powder particles in the powder container 24 float in the fluidizing air flowing out of the fluidizing body 70 in the area of the suction opening 52, so that they are removed from the vacuum the vacuum chamber 54 can be suctioned off.
  • the suction opening 52 opens into the downward-facing outer surface 46 next to the fluidizing body 70.
  • the candle-shaped fluidizing body 70 is located axially below the vertical bore 56, to which the first compressed air tube 34 is connected vertically.
  • the powder container can stand on a vibrator 74 which vibrates the powder container 24 to loosen the powder in it.
  • Positioning arm 20 is required. This results in the possibility of connecting the positioning arm 20 either as a lifting arm or robot arm to the immersion devices 1 to 16 or to form the positioning arm 20 as a fixed arm which serves only as a guide body for the diving devices 1 to 16 which can be moved vertically relative to it.
  • a further embodiment can consist in that the positioning arm 20 is firmly connected to the immersion bodies 1 to 16 and the positioning device 18 has a vertical guide rail in which the positioning arm 20 is guided vertically and is freely movable. In the latter two embodiments, it is expedient to provide the positioning arm 20 with a locking device, by means of which the immersion devices 1 to 16 can be fixed in a position located above the powder container 24 when the powder container 24 is changed.

Landscapes

  • Coating Apparatus (AREA)
EP95108877A 1994-07-02 1995-06-09 Dispositif pneumatique pour transporter de la poudre, notamment de la poudre de revêtement Withdrawn EP0689875A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4423254 1994-07-02
DE19944423254 DE4423254C2 (de) 1994-07-02 1994-07-02 Pneumatische Fördervorrichtung für Pulver, insbesondere Beschichtungspulver

Publications (2)

Publication Number Publication Date
EP0689875A2 true EP0689875A2 (fr) 1996-01-03
EP0689875A3 EP0689875A3 (fr) 1996-08-07

Family

ID=6522108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95108877A Withdrawn EP0689875A3 (fr) 1994-07-02 1995-06-09 Dispositif pneumatique pour transporter de la poudre, notamment de la poudre de revêtement

Country Status (2)

Country Link
EP (1) EP0689875A3 (fr)
DE (1) DE4423254C2 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760259A1 (fr) * 1995-08-26 1997-03-05 ITW Gema AG Dispositif d'injection pour le revêtement par pulvérisateur de poudre
EP0913203A1 (fr) * 1997-11-03 1999-05-06 ITW Gema AG Méthode et appareil de revêtement par poudre avec alimentation d'air de purge
WO1999061162A1 (fr) * 1998-05-22 1999-12-02 Kraemer Erich Systeme d'alimentation en poudre pour installation d'enduction comportant une pluralite d'unites d'application
US6194027B1 (en) 1997-11-03 2001-02-27 Itw Gema Ag Method and equipment for powder spray coating
WO2001019529A2 (fr) * 1999-09-17 2001-03-22 Nordson Corporation Systeme d'application de poudre a changement de couleur rapide
EP1222963A2 (fr) 2001-01-13 2002-07-17 ITW Gema AG Revêtement par pulvérisation et centre de traitement de poudre
US6730169B2 (en) 2000-08-22 2004-05-04 Nordson Corporation Electrostatic power coating system
US6821346B2 (en) 2000-03-31 2004-11-23 Nordson Corporation Powder coating systems
US6852164B2 (en) 1998-05-22 2005-02-08 Nordson Corporation Powder supply system for coating installations with a plurality of application units
US6852165B2 (en) 1997-09-05 2005-02-08 Nordson Corporation Powder spray coating

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29723225U1 (de) 1997-07-10 1998-06-04 Kolb, Robert, jun., 88046 Friedrichshafen Pneumatische Vorrichtung zum Ansaugen von Farbpulver aus einem Behältnis

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114097A1 (de) 1991-04-30 1992-11-05 Thiemt Ohg Geb Vorrichtung zur pulverbeschichtung

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH191578A (fr) * 1933-11-18 1937-06-30 Benoit Francois Philippe Charl Appareil de mise en suspension de poudres dans un courant gazeux.
FR1398331A (fr) * 1964-06-09 1965-05-07 Ransburg Electro Coating Corp Procédé et appareil d'enduisage électrostatique
US3740612A (en) * 1971-05-28 1973-06-19 Champion Spark Plug Co Apparatus for coating with electrostatically charged particulate materials
FR2171686A5 (fr) * 1972-02-10 1973-09-21 Air Ind
CA998410A (en) * 1974-01-16 1976-10-12 Charles R. Vertue Particulate material conveying apparatus
DE2508260A1 (de) * 1975-02-26 1976-09-09 Hebenstiel Hans Werner Foerder- und dosiergeraet fuer pulverfoermige ueberzugsmittel zum beschichten von werkstuecken
EP0184994B2 (fr) * 1984-09-26 1992-11-19 Siegfried Frei Dispositif d'aspiration pour poudre
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
DE4010914C1 (en) * 1990-04-04 1991-07-11 Wagner International Ag, Altstaetten, Ch Fluidising and convey set=up for electrostatic powder coating appts. - has container pivotable about 180 deg. on frame and with fluidising plate on lid
DE4012190A1 (de) * 1990-04-14 1991-10-17 Gema Ransburg Ag Pneumatische pulvertransportvorrichtung
DE4013061A1 (de) * 1990-04-24 1991-11-14 Metri Airfluid Ag Einrichtung zum fluidisieren von in einem behaelter befindlichen pulver und abfuehren fluidisierten pulvers unmittelbar zu einer spruehpistole einer elektrostatischen pulverbeschichtungsanlage
DE4021674A1 (de) * 1990-07-07 1992-01-16 Gema Ransburg Ag Vorrichtung zum pneumatischen foerdern von pulver aus einem behaelter
DE69132062T2 (de) * 1990-12-27 2000-09-07 Matsuo Sangyo Co. Ltd., Osaka Vorrichtung zur Zuführung von Pulverfarben
GB2276571A (en) * 1993-03-26 1994-10-05 Static International Limited Powder feed venturi device for electrostatic spray guns

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114097A1 (de) 1991-04-30 1992-11-05 Thiemt Ohg Geb Vorrichtung zur pulverbeschichtung

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5846031A (en) * 1995-08-26 1998-12-08 Gema Volstatic Ag Powder spray coating injector device
EP0760259A1 (fr) * 1995-08-26 1997-03-05 ITW Gema AG Dispositif d'injection pour le revêtement par pulvérisateur de poudre
US6852165B2 (en) 1997-09-05 2005-02-08 Nordson Corporation Powder spray coating
US6217654B1 (en) 1997-11-03 2001-04-17 Itw Gema Ag Method and equipment for powder spray coating
EP0913203A1 (fr) * 1997-11-03 1999-05-06 ITW Gema AG Méthode et appareil de revêtement par poudre avec alimentation d'air de purge
US6194027B1 (en) 1997-11-03 2001-02-27 Itw Gema Ag Method and equipment for powder spray coating
US6852164B2 (en) 1998-05-22 2005-02-08 Nordson Corporation Powder supply system for coating installations with a plurality of application units
WO1999061162A1 (fr) * 1998-05-22 1999-12-02 Kraemer Erich Systeme d'alimentation en poudre pour installation d'enduction comportant une pluralite d'unites d'application
WO2001019529A3 (fr) * 1999-09-17 2003-04-17 Nordson Corp Systeme d'application de poudre a changement de couleur rapide
WO2001019529A2 (fr) * 1999-09-17 2001-03-22 Nordson Corporation Systeme d'application de poudre a changement de couleur rapide
US7074274B1 (en) 1999-09-17 2006-07-11 Nordson Corporation Quick color change powder coating system
US6821346B2 (en) 2000-03-31 2004-11-23 Nordson Corporation Powder coating systems
US7014556B2 (en) 2000-03-31 2006-03-21 Nordson Corporation Powder coating systems
US7997963B2 (en) 2000-03-31 2011-08-16 Nordson Corporation Powder coating systems
US6730169B2 (en) 2000-08-22 2004-05-04 Nordson Corporation Electrostatic power coating system
EP1222963A2 (fr) 2001-01-13 2002-07-17 ITW Gema AG Revêtement par pulvérisation et centre de traitement de poudre
US6699325B2 (en) 2001-01-13 2004-03-02 Itw Gema Ag Powder facility for spray-coating purposes

Also Published As

Publication number Publication date
DE4423254C2 (de) 1998-11-05
DE4423254A1 (de) 1996-01-04
EP0689875A3 (fr) 1996-08-07

Similar Documents

Publication Publication Date Title
DE69729578T2 (de) Flüssigkeitsabgabevorrichtung und -verfahren
EP0727258A1 (fr) Dispositif de nettoyage d'un cabine de poudrage
DE4339492A1 (de) Pulverlackieranlage mit einer Kabine mit variablem Querschnitt
DE4021674C2 (fr)
EP0689875A2 (fr) Dispositif pneumatique pour transporter de la poudre, notamment de la poudre de revêtement
EP1222963A2 (fr) Revêtement par pulvérisation et centre de traitement de poudre
EP0913203B1 (fr) Méthode et appareil de revêtement par poudre avec alimentation d'air de purge
EP0777534B1 (fr) Dispositif de mise en peinture de pieces par pulverisation
AT401389B (de) Pulver-sprühbeschichtungsvorrichtung
EP0760259B1 (fr) Dispositif d'injection pour le revêtement par pulvérisateur de poudre
EP0769327A2 (fr) Dispositif de revêtement par poudre
DE19500872B4 (de) Pulver-Sprühbeschichtungsvorrichtung
DE19748376A1 (de) Verfahren und Vorrichtung zum Pulver-Sprühbeschichten
DE29518478U1 (de) Pulverförderinjektor
DE4114097C2 (de) Vorrichtung zur Pulverbeschichtung
DE69916466T2 (de) Schmierstoffgeber
DE4413347A1 (de) Pulverbeschichtungskabine
EP3743215B1 (fr) Centre d'alimentation en poudres multicolores conçu pour alimenter à la demande au moins un dispositif de pulvérisation de poudres en poudres de revêtement de différents types
DE102006005209A1 (de) Sauglanze, Vorrichtung und Verfahren zum Fördern von pulverförmigem Material zu einer Dichtstrompumpe
DE9105321U1 (de) Vorrichtung zur Pulverbeschichtung
EP3743217B1 (fr) Centre d'alimentation en poudre multicolore destiné à alimenter selon les besoins au moins un équipement d'aspersion de poudre en poudre de revêtement de types différents
EP3743216B1 (fr) Centre d'alimentation en poudre à plusieurs couleurs pour l'alimentation en cas de besoin d'au moins un dispositif de pulvérisation de poudre avec une poudre de revêtement de différent types
DE10261292B4 (de) Vorlagebehälter für pulverförmige Medien
DE19852892C2 (de) Vorrichtung für die Bildung von Dekorschichten
DE4423197A1 (de) Pulverpumpe, insbesondere für Pulver zum Sprühbeschichten von Gegenständen

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

17P Request for examination filed

Effective date: 19950609

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE ES FR IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE ES FR IT LI

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19961221