EP0520855B1 - Installation de projection électrostatique de produit de revêtement en poudre - Google Patents

Installation de projection électrostatique de produit de revêtement en poudre Download PDF

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Publication number
EP0520855B1
EP0520855B1 EP92401648A EP92401648A EP0520855B1 EP 0520855 B1 EP0520855 B1 EP 0520855B1 EP 92401648 A EP92401648 A EP 92401648A EP 92401648 A EP92401648 A EP 92401648A EP 0520855 B1 EP0520855 B1 EP 0520855B1
Authority
EP
European Patent Office
Prior art keywords
powder
connection
reservoir
associated unit
installation
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
EP92401648A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0520855A1 (fr
Inventor
André Frene
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.)
Sames SA
Original Assignee
Sames SA
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 Sames SA filed Critical Sames SA
Publication of EP0520855A1 publication Critical patent/EP0520855A1/fr
Application granted granted Critical
Publication of EP0520855B1 publication Critical patent/EP0520855B1/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
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet

Definitions

  • the invention relates to an installation for electrostatic spraying of powder coating product, in particular a thermosetting powder paint, it relates more particularly to an improvement allowing a relatively simple and rapid color change.
  • powder coating product in particular a thermosetting powder paint
  • Such an installation is known from document US-A-3,667,674.
  • a powder coating product installation generally comprises a cabin in which the objects to be covered move opposite a plurality of powder projectors.
  • electrostatic powder projectors for example of the order of twenty per cabin.
  • These projectors must therefore be connected to the same source or reservoir of powder. If the installation is intended for more or less frequent color changes, it is therefore necessary, each time, to clean the cabin, the projectors and all the supply ducts of these projectors before connecting them to a new one. another color powder source or reservoir.
  • the invention makes it possible to simplify these operations and to reduce the downtime at each color change, by allowing simple, effective, rapid and simultaneous cleaning of all the projectors and their powder supply circuits.
  • the invention therefore relates to an installation for electrostatic projection of powder coating product, comprising a plurality of powder projectors and several powder reservoirs each containing powder of specific color, characterized in that each reservoir is provided with '' a plurality of suction tubes, in that the connection ends of these tubes are all arranged side by side on a connection base of said tank, in that a connecting block is provided with suction devices powder each establishing communication between a duct connected to a projector or group of projectors and one of said suction tubes, in that said connection block is removable so that it can be mounted on a connection base of a chosen tank and in that said installation comprises in addition to an air blowing station provided with a connection base similar to that of a reservoir and comprising air ejection orifices arranged to be connected to said suction devices.
  • connection block connected to one of the tanks is quickly detached and connected to the blowing station where pressurized air is injected into all the powder supply conduits of all projectors simultaneously. After blowing, the connection block is mounted on the connection base of another reservoir containing the powder of the new chosen color.
  • connection block is advantageously provided with handles making it possible to move it from one connection base to another and it is preferably hung up by slings or the like to a load balancing system.
  • the installation shown in the drawings comprises several electrostatic powder projectors 11 installed on mobile equipment 12 moving, here vertically, on supports 13 in the form of columns. These supports are installed in a cabin not shown.
  • a single cabin can house a fairly large number of projectors, of the order of twenty, depending on the dimensions and complexity of the objects to be covered.
  • Each projector (or each group of a small number of projectors) is supplied with powder by a flexible conduit 14. All these conduits are grouped in a sheath 15 and connected to a connection block 18, constituting one of the elements of the invention and which will be described later.
  • the installation further comprises a gantry 20 placed in the immediate vicinity of the cabin and on which are installed several powder reservoirs 22.
  • Each reservoir here in the form of a rectangular parallelepiped, contains powder of a specific color and is connected to powder supply means not shown, by a flexible conduit 24, so that it can be replenished with powder.
  • Each reservoir 22 contains a plurality of suction tubes 26 (typically about twenty such tubes) placed side by side and immersed in the powder. This is normally maintained in the fluidized state, by injecting air into the tank. Connection ends 27 of these tubes pass through the front wall 28 of the tank so as to be side-by-side on a connection base 30 fixed to this front wall and intended to receive the connection block 18. These connection ends therefore flush through holes 27 has respective to the surface of the base connection 30.
  • connection block 18 is provided with powder suction devices 32 each establishing communication between a conduit 14 and a suction tube 26. These suction devices 32 are installed side by side on the connection block. More specifically, entry 34 of such a suction device is a conduit formed in the connection block 18 and which is placed facing the opening 27 has corresponding. O-rings 31, housed in annular grooves made on the surface of the connection block and surrounding the inlets 34, ensure a sealed connection between the suction tubes 26 and the suction devices 32.
  • the latter are here conventional venturi devices, supplied by compressed air supplied by respective distribution conduits 38, via individual injectors 39.
  • the flexible conduits 38 are grouped in a common sheath 40 connected to a cabinet 41 containing a set of valves control and pressure regulating means for adjusting the air injection, independently in all suction devices.
  • the outlet of each suction device is connected to a flexible conduit 14.
  • connection block 18 is removable and mobile. It can thus be mounted on the connection base 30 of any chosen tank.
  • each connection base is provided with two positioning elements 42, projecting from its surface while the connection block is provided with two corresponding holes 44.
  • connection block is provided with handles 46 so that it can be moved from one connection base to another. It is also provided with fastening fastening screws 47, capable of cooperating with tapped holes 48 made in the bases.
  • the connection block is hung up by slings 49 or the like to a load balancing system 50. The latter, visible in part in FIG.
  • the gantry 20 supports an air blowing station 56 provided with a connection base 57 similar to that of a tank and comprising air ejection orifices 58 arranged to be connected to the suction devices at venturi.
  • the inlet of each suction device is located opposite an air ejection orifice 58 when the connection block is mounted on the connection base 57 of the air blowing station 56
  • the latter is connected to a source of compressed air which is not shown, for example housed in the cabinet 41.
  • connection block 18 When you want to change the powder, stop spraying and detach the connection block from the tank on which it is mounted. The said connection block is then placed on the air blowing station 56 so that all the suction devices are simultaneously connected to the source of compressed air. All the conduits in which the powder circulates, the connection block and the projectors are thus quickly and simultaneously blown clean by blowing. After cleaning the cabin, it only remains to bring the connection block 18 against the front wall of another reservoir 22 containing a powder of another color and to connect said connection block to the base of this tank. The installation is then ready for operation again.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Coating Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP92401648A 1991-06-24 1992-06-15 Installation de projection électrostatique de produit de revêtement en poudre Expired - Lifetime EP0520855B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9107713 1991-06-24
FR9107713A FR2677900B1 (fr) 1991-06-24 1991-06-24 Installation de projection electrostatique de produit de revetement en poudre.

Publications (2)

Publication Number Publication Date
EP0520855A1 EP0520855A1 (fr) 1992-12-30
EP0520855B1 true EP0520855B1 (fr) 1995-01-18

Family

ID=9414183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92401648A Expired - Lifetime EP0520855B1 (fr) 1991-06-24 1992-06-15 Installation de projection électrostatique de produit de revêtement en poudre

Country Status (5)

Country Link
US (1) US5215261A (ja)
EP (1) EP0520855B1 (ja)
JP (1) JPH05184980A (ja)
DE (1) DE69201220T2 (ja)
FR (1) FR2677900B1 (ja)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418288A1 (de) * 1994-05-26 1995-11-30 Gema Volstatic Ag Elektrostatische Sprühvorrichtung
DE19705381C2 (de) * 1997-02-12 1999-06-17 Wagner Int Einrichtung und Verfahren zum elektrostatischen Pulverbeschichten von Werkstücken
US6223997B1 (en) * 1998-09-17 2001-05-01 Nordson Corporation Quick color change powder coating system
US6705545B1 (en) 1998-11-13 2004-03-16 Steelcase Development Corporation Quick color change powder paint system
US6112999A (en) 1998-11-13 2000-09-05 Steelcase Development Inc. Powder paint system and control thereof
US6695220B2 (en) 2001-01-11 2004-02-24 Herman Miller, Inc. Powder spray coating system
US6589342B2 (en) 2001-04-02 2003-07-08 Abb Automation Inc. Powder paint color changer
US7005159B2 (en) * 2001-04-02 2006-02-28 Abb Inc. Method of operating powder paint applicator
DE10130173A1 (de) * 2001-06-22 2003-01-02 Duerr Systems Gmbh Pulverbeschichtungsanlage
US6676049B2 (en) 2001-11-16 2004-01-13 Efc Systems, Inc. Bell cup powder spray applicator
JP4106948B2 (ja) * 2002-03-29 2008-06-25 東京エレクトロン株式会社 被処理体の跳上り検出装置、被処理体の跳上り検出方法、プラズマ処理装置及びプラズマ処理方法
WO2006004601A1 (en) * 2004-06-03 2006-01-12 Nordson Corporation Color change for powder coating material application system
US20060219807A1 (en) * 2004-06-03 2006-10-05 Fulkerson Terrence M Color changer for powder coating system with remote activation
WO2006122281A2 (en) * 2005-05-11 2006-11-16 Dürr Systems, Inc. Fluid line clearing system
US20080152437A1 (en) * 2006-12-26 2008-06-26 Illinois Tool Works Inc. Pulverulent material transport
US20080205189A1 (en) 2007-02-27 2008-08-28 Illinois Tool Works Inc. Dense phase pump for pulverulent material
CN111299280A (zh) * 2020-03-04 2020-06-19 宝悦自动化装备（上海）有限公司 一种运输罐体的清洗系统
CN114892119B (zh) * 2022-05-06 2023-09-29 无锡市新达共创纳米科技有限公司 一种机械端面密封复合陶瓷喷涂工艺

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935977A (en) * 1929-12-10 1933-11-21 Wesley M Wooten Control device for spray mixing apparatus
US3034685A (en) * 1957-05-13 1962-05-15 Seeburg Corp Manifold dispensing valve
GB1068021A (en) * 1963-01-17 1967-05-10 Richards Morphy N I Ltd Improvements relating to spraying equipment
US3674207A (en) * 1970-11-06 1972-07-04 Emidio J Carbonetti Jr Automated paint spray system
US3667674A (en) * 1971-02-16 1972-06-06 Graco Inc Electrostatic powder coating apparatus
CH539461A (de) * 1971-08-02 1973-07-31 Gema Ag App Bau Pulverspritzpistole zum Verspritzen von verschiedenfarbigen Pulvern aus einem Pistolen-Pulverkanal
US3896998A (en) * 1972-09-25 1975-07-29 Volstatic Canada Apparatus for spraying particulate material
US4475819A (en) * 1981-03-25 1984-10-09 Charles Balmer Pneumatic granular or seed applicator
US4673006A (en) * 1985-08-12 1987-06-16 Herschel Corporation (Delaware Corp.) Apparatus and method for removing liquid from and cleaning a container
US4793742A (en) * 1986-03-17 1988-12-27 Tci, Inc. Truck mounted fertilizer applicator using fluid conveying

Also Published As

Publication number Publication date
DE69201220T2 (de) 1995-05-24
FR2677900A1 (fr) 1992-12-24
EP0520855A1 (fr) 1992-12-30
DE69201220D1 (de) 1995-03-02
FR2677900B1 (fr) 1993-10-08
US5215261A (en) 1993-06-01
JPH05184980A (ja) 1993-07-27

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