EP0925842A2 - Dispositif de revêtement par projection de poudre - Google Patents

Dispositif de revêtement par projection de poudre Download PDF

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Publication number
EP0925842A2
EP0925842A2 EP98115297A EP98115297A EP0925842A2 EP 0925842 A2 EP0925842 A2 EP 0925842A2 EP 98115297 A EP98115297 A EP 98115297A EP 98115297 A EP98115297 A EP 98115297A EP 0925842 A2 EP0925842 A2 EP 0925842A2
Authority
EP
European Patent Office
Prior art keywords
air
groove
conveying
spray coating
powder
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Withdrawn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
EP98115297A
Other languages
German (de)
English (en)
Other versions
EP0925842A3 (fr
Inventor
Eugen Thomas Dr. Bühlmann
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 EP0925842A2 publication Critical patent/EP0925842A2/fr
Publication of EP0925842A3 publication Critical patent/EP0925842A3/fr
Withdrawn legal-status Critical Current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 powder spray coating device according to the preamble of Claim 1.
  • Such a powder spray coating device is made of known from DE 44 09 493 A1. It contains an air divider for the adjustable division of a total air flow a conveying air flow and an additional air flow, so that when setting a larger one Conveying air quantity the additional air quantity in a predetermined Ratio decreases, and vice versa.
  • the well-known air divider has a housing with a through hole in which two opposite paragraphs pointing outwards one Form valve seat, which together with two valve bodies two Form valves. The two valve bodies are through one Valve rod connected together so that the one valve is closed when the other is opened. In order to one valve controls the conveying air flow and the other Valve the additional air flow.
  • the total airflow for both Air flows from a distribution chamber that is in the housing is formed in the space between the two valves, through an annular space between the wall of the Through hole and the valve stem to the two Valve seats.
  • An inlet for the total air into the Distribution chamber is radial on one side of the valve stem arranged to her and the two outlets for the Conveying air and the additional air are radial to the valve rod arranged on the radially opposite side.
  • the Both valve bodies can be used together with their valve stem can be adjusted axially relative to the valve seats a handwheel on one axial end of the valve rod or by an electrical actuator at the other end of the Valve stem.
  • a powder spray coater with an air divider of this type is also known from US 3,625,404 known.
  • an injector for the pneumatic conveying of powder
  • the Conveying air flow in a vacuum area of the injector sucks in powder according to the Venturi principle and then through an air-powder path, usually a hose, to one Spray device, for example a spray gun or a Rotary atomizer, promotes.
  • a strong flow of conveying air creates a strong negative pressure and thereby promotes a lot Powder.
  • a weak flow of conveying air promotes little Powder. So that there are no pulsations in the air-powder path Powder deposits must occur in the known Devices the flow rate at least 10 m / sec.
  • the object of the invention is to solve the problem Efficiency and quality of the powder coating too improve by creating an opportunity for one finer adjustment of very small changes in the Conveying air volume and the additional air volume as well as their Relationship to each other.
  • Fig. 1 shows a compressed air source 2, of which one Pressure regulator 4 compressed air with regulated pressure via a Total air supply line 6 in the direction of an arrow 10 a total air inlet 12 into a plenum 14 Air divider 16 flows.
  • the distribution chamber 14 is through an annular groove is formed in an air divider shaft 18.
  • the air divider shaft 18 extends through a Through hole 20 of a bearing housing 22 and projects with two shaft end sections 24 and 26 out of it.
  • a protruding shaft end portion 24 is a handwheel 28 and at the other protruding shaft end section 26 a motor drive 30, for example an electric motor with a reduction gear, arranged so that the Air divider shaft 18 depending on a desired one Conveying air quantity or powder quantity per unit of time optionally by hand on the handwheel 28 or automatically by the electric motor drive 30 can be driven for example from an electronic or computerized control device depending on a computer program and / or those to be coated Objects 32.
  • the circumferential groove that forms the plenum 14 becomes axially on both sides of an annular collar 34 and 36 each Air divider shaft 18, which in a bearing shell 38 are rotatably mounted, which in the through opening 20th of the bearing housing 22 is housed.
  • every bundle of rings 34 and 36 is at least one in a radial plane formed in the circumferential direction groove 40 and 42, which each from a groove start 41 or 43 to one Groove end 45 or 47 a continuously decreasing Cross-section, preferably a continuously smaller one increasing depth with constant groove width.
  • the Grooves 40 and 42 are from the inner bearing surface 39 of the Bearing shell 38 covered so that each groove together with the Bearing surface 39 from the beginning of the groove to the end of the groove forms increasingly larger flow resistance.
  • the Groove starts 41 and 43 are each by an axially parallel Connection groove 50 and 52, which in the ring collars 34 and 36 are formed, connected to the distribution chamber 14.
  • Outlet opening 54 and 56 formed, which are each only over extends a very short part of the groove length and ever after rotation of the distributor shaft 18 with different Sections of the associated groove 40 and 42 covers, so that each groove 40 and 42 a flow restrictor with variable, forms finely adjustable flow resistance.
  • the grooves 40 and 42 extend in opposite directions Circumferential directions depending on their groove start 41 or 43 their groove end 45 or 47. This turns the Air divider shaft 18 the amount of air at an air outlet 54th reduced as the amount of air at the other outlet 56 increases and vice versa, in a ratio according to the changing cross sections of these grooves.
  • the cross sections of the grooves can be non-uniform or preferably change uniformly, stepwise or preferably continuously.
  • the shaft section 62 which the distribution chamber 14th limited and the two bundles of rings 34 and 38 with each other connects, is provided with a radial bore 64, in which a stop pin 66 according to FIG. 5 is used.
  • the stop pin 66 strikes in both Shaft directions of rotation on a sleeve 66, which in the Total air inlet 12 is inserted, and thereby limited in both directions of rotation the rotational movements of the Air divider shaft 18.
  • an air outlet opening 54 of the bearing shell 38 aligns a connection opening 57, from which conveying air via a conveying air line 70 in the direction of arrow 72 the vacuum region 74 of an injector 76 to one Spray device 78 is promoted.
  • the conveying air sucks in Vacuum area 74 coating powder from one Powder container 80 and conveys it via a hose 82 to the spraying device 78 which applies the powder to the coating object 32 sprays.
  • the other air outlet 56 is via a connection opening 84 to an additional air line 86 connected and directs additional air towards one Arrow 88 downstream of the vacuum region 74 through an auxiliary air inlet 89 in the air-powder path, which through the downstream of the vacuum region 74 Part of the injector 76 and the hose 82 is formed.
  • the additional air 86 is preferably in the injector in the Conveying air powder flow initiated, however, according to another embodiment also introduced into the hose 82 become. Instead of the spray device 78, the powder fed through hose 82 to another device e.g. in a container or cyclone.
  • Control air line 90 control air in the vacuum region 74 of the injector 76 to promote that of the conveying air if necessary to reduce the negative pressure generated, for example to switch off the powder feed without switch off the conveying air flow when in the spray area there is no object 32 in the spray device 78.
  • the plenum 14 can be replaced by an annular groove in the air divider shaft 18 through a Inner circumferential groove in the housing 22, which the bearing shell 38 axially interrupts, be formed, or partially in both parts.
  • Another option is to use the Split air divider shaft 18 over two shaft parts between the two shaft bundles 34 and 36 in the area of Distribution chamber 14. These two shaft parts can be rotatably connected to each other or independently be rotatable from one another, for example in opposite directions of rotation. At it is the opposite possibility of rotation of the shaft parts expedient to couple both shaft parts together, either electrically via electrical actuators, e.g. Servomotors, or mechanically via a reversing gear.
  • the size of the flow resistance of the throttle channels, which are formed by the grooves 40 and 42, and their Relationship to each other, or quotient, are of the Flow resistances of the conveying air path and Additional airway in the injector 76 dependent. That is why for different injector shapes 76 different air divider shafts 18 required.

Landscapes

  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Coating Apparatus (AREA)
EP98115297A 1997-11-05 1998-08-14 Dispositif de revêtement par projection de poudre Withdrawn EP0925842A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19748821A DE19748821A1 (de) 1997-11-05 1997-11-05 Pulver-Sprühbeschichtungsvorrichtung
DE19748821 1997-11-05

Publications (2)

Publication Number Publication Date
EP0925842A2 true EP0925842A2 (fr) 1999-06-30
EP0925842A3 EP0925842A3 (fr) 2001-02-28

Family

ID=7847662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98115297A Withdrawn EP0925842A3 (fr) 1997-11-05 1998-08-14 Dispositif de revêtement par projection de poudre

Country Status (6)

Country Link
US (1) US6155752A (fr)
EP (1) EP0925842A3 (fr)
JP (1) JPH11239741A (fr)
CN (1) CN1218721A (fr)
CA (1) CA2253072A1 (fr)
DE (1) DE19748821A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101634658B (zh) * 2008-05-30 2013-09-11 基立福有限公司 在凝胶卡上自动分析样品的装置

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003204020B2 (en) * 1998-02-06 2005-03-24 Cnh Industrial Canada, Ltd. Improved agricultural pneumatic conveyance device
GB9802527D0 (en) * 1998-02-06 1998-04-01 Flexi Coil Ltd Delivery of seeds by air conveyor
US7343422B2 (en) * 2000-04-28 2008-03-11 Adara Networks, Inc. System and method for using uniform resource locators to map application layer content names to network layer anycast addresses
FR2824283B1 (fr) * 2001-05-03 2004-10-29 Eisenmann France Sarl Procede de regulation du debit de poudre transportee par un flux d'air, et dispositif pour sa mise en oeuvre
BR0215688A (pt) * 2002-05-10 2005-02-01 Eisenmann France Sarl Processo de regulagem da vazão de pó em um dispositivo de fornecimento de uma vazão de pó transportado por um fluxo de ar e dispositivo de injeção e de transporte de pó
DE102005007242A1 (de) * 2005-02-17 2006-08-24 Itw Gema Ag Druckluft-Drosselvorrichtung und Pulversprühbeschichtungsvorrichtung
US20060185671A1 (en) * 2005-02-17 2006-08-24 Durr Systems, Inc. Powder conveying pump
DE102005013091B3 (de) * 2005-03-18 2006-09-14 Eisenmann Maschinenbau Gmbh & Co. Kg Vorrichtung zum Fördern pulverförmiger fluidisierter Medien
DE102007005313A1 (de) * 2007-02-02 2008-08-07 Itw Gema Ag Beschichtungspulver-Fördervorrichtung
JP6411873B2 (ja) * 2014-11-25 2018-10-24 株式会社トップ工業 分流装置、制御方法、分流方法およびプログラム、並びに流量特性測定方法
GB201509080D0 (en) 2015-05-27 2015-07-08 Landa Labs 2012 Ltd Coating apparatus
CN114287650B (zh) * 2021-12-11 2022-12-27 江苏丰尚智能科技有限公司 调质器
USD1027343S1 (en) * 2023-04-17 2024-05-14 Hefei Yaozhong International Trade Co., Ltd. Powder duster

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625404A (en) 1969-06-02 1971-12-07 Ransburg Electro Coating Corp Apparatus and method for dispensing particulate material
DE4409493A1 (de) 1993-03-26 1994-09-29 Peter Ribnitz Luftteilerventil

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849295C2 (de) * 1978-11-14 1985-04-04 Ransburg-Gema AG, St.Gallen Sprühbeschichtungsvorrichtung zum Beschichten von Gegenständen
DE3528749C2 (de) * 1985-08-10 1994-12-15 Ulmer Gmbh Schweissanlagen Düsenträger für eine Metallpulver-Flammspritzpistole
FR2587081B1 (fr) * 1985-09-11 1988-04-15 Bp Chimie Sa Dispositif doseur de type rotatif permettant de delivrer des substances granulaires
US5356577A (en) * 1988-04-02 1994-10-18 Dr. Karl Thomae Gmbh Controlled release of metered quantities of finely divided solids with a venturi nozzle and regulated control
DE3926624A1 (de) * 1989-08-11 1991-02-14 Gema Ransburg Ag Elektrostatische pulverbeschichtungseinrichtung
DE4242225C2 (de) * 1992-07-13 1996-07-18 Hans Glogau Pulverlackpumpe für die Erzeugung und Dosierung eines unter Überdruck fließenden tribofähigen Pulvers
DE4325044C2 (de) * 1993-07-26 2002-07-18 Itw Gema Ag Pulverfördervorrichtung, insbesondere für Beschichtungspulver
DE29518478U1 (de) * 1995-11-21 1996-01-18 PROTEC Automatisierungssysteme GmbH, 32257 Bünde Pulverförderinjektor
DE19548607A1 (de) * 1995-12-23 1997-06-26 Gema Volstatic Ag Pulver-Sprühbeschichtungsvorrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625404A (en) 1969-06-02 1971-12-07 Ransburg Electro Coating Corp Apparatus and method for dispensing particulate material
DE4409493A1 (de) 1993-03-26 1994-09-29 Peter Ribnitz Luftteilerventil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101634658B (zh) * 2008-05-30 2013-09-11 基立福有限公司 在凝胶卡上自动分析样品的装置

Also Published As

Publication number Publication date
JPH11239741A (ja) 1999-09-07
CA2253072A1 (fr) 1999-05-05
EP0925842A3 (fr) 2001-02-28
DE19748821A1 (de) 1999-05-06
US6155752A (en) 2000-12-05
CN1218721A (zh) 1999-06-09

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