WO2006084253A2 - Systeme et methode de transport de peinture en poudre finale a phase dense - Google Patents

Systeme et methode de transport de peinture en poudre finale a phase dense Download PDF

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Publication number
WO2006084253A2
WO2006084253A2 PCT/US2006/004219 US2006004219W WO2006084253A2 WO 2006084253 A2 WO2006084253 A2 WO 2006084253A2 US 2006004219 W US2006004219 W US 2006004219W WO 2006084253 A2 WO2006084253 A2 WO 2006084253A2
Authority
WO
WIPO (PCT)
Prior art keywords
receiver
powdery substance
transporter
feed
feed transporter
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.)
Ceased
Application number
PCT/US2006/004219
Other languages
English (en)
Other versions
WO2006084253A3 (fr
Inventor
Joseph M. Klobucar
James L. Pakkala
David J. Cole
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.)
Duerr Systems Inc
Original Assignee
Duerr Systems Inc
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 Duerr Systems Inc filed Critical Duerr Systems Inc
Publication of WO2006084253A2 publication Critical patent/WO2006084253A2/fr
Publication of WO2006084253A3 publication Critical patent/WO2006084253A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/16—Gas pressure systems operating with fluidisation of the materials
    • B65G53/18—Gas pressure systems operating with fluidisation of the materials through a porous wall
    • B65G53/22—Gas pressure systems operating with fluidisation of the materials through a porous wall the systems comprising a reservoir, e.g. a bunker

Definitions

  • This invention relates to a powdery substance transport system and a method of transporting a powdery substance in bulk phase to an applicator. More specifically, this invention relates to a dense phase powder paint transport system for transporting powder paint to a paint applicator disposed within a paint application housing. BACKGROUND OF THE INVENTION
  • powdery substances in manufacturing operations has increased in recent years, primarily due to the restrictions placed by various government agencies upon volatile emissions vented to the atmosphere.
  • the application of powdery substances is gaining wider acceptance in vehicle manufacturing as powder paint applied to vehicle bodies inside the powder paint application housing typically has a complete absence of volatile emissions.
  • powder paint is received in a primary hopper having a fluidized bed to maintain the powder paint in a fluidized state and is then delivered to a remote location having a final feed hopper connected to one or a plurality of paint applicators.
  • the transportation of the powder paint is performed by vacuum dilute phase equipment as disclosed, for example, in United States Patent No.
  • the present application discloses the method and apparatus for transporting a powdery substance from a source of the powdery substance to an applicator for applying the powdery substance to an article.
  • a receiver is fluidly connected to a source of the powdery substance for receiving the powdery substance under pressure from the source.
  • the receiver has a fluidizer for maintaining the powdery substance in a fluidized state while under pressure.
  • the feed transporter receives the powdery substance from the receiver and includes a transporter fluidizer for maintaining the powdery substance in a fluidized state while under pressure.
  • a powder applicator is fluidly connected to the feed transporter for receiving the powdery substance under pressure and applying the powdery substance to an article.
  • the equalizer is interconnected to the receiver and the feed transporter for equalizing a gas pressure between the receiver and the feed transporter while the powdery substance is being transferred to the feed transporter from the receiver.
  • One method contemplated by the inventors for transferring the powdery substance from the receiver to the feed transporter is through gravitational forces, which is facilitated by the fluidized state of the powdery substance and, furthermore, eliminates the need for a transfer pump disposed between the receiver and the feed transporter.
  • Figure 1 is a schematic view of the inventive dense phase powdery substance transport system.
  • FIG. 1 a schematic view of the inventive powdery substance transport system is generally shown at 10.
  • a source of the powdery substance 12 is connected to a receiver 14 by receiver fill line 16.
  • the powdery substance contemplated for the present invention is powder paint used to coat articles, such as, for example, motor vehicle bodies and components in the absence of a release of volatiles to the environment.
  • a receiver fill valve 18 is disposed within the receiver fill line 16 between the receiver 14 and the source 12 for controlling when the powdery substance is transferred to the receiver 14 from the source 12 as will be described further below.
  • the receiver 14 includes a receiver fluidizer 20 having a fluidizing plate 22 with a porous composition as is known to those of skill in the art.
  • a source of fluidizing air 24 provides air to the fluidizer 20 beneath the fluidizing plate 22 providing fluidizing air to the receiver 14 to maintain a powdery substance in a fluidized state.
  • Other types of fiuidizers may also be used as is known to those of skill in the art.
  • the receiver 14 is generally maintained at a positive pressure of up to 15 psig, the purpose of which will become more evident as described further below.
  • a feed transporter line 26 connects the receiver 14 to a feed transporter 28 for transferring the powdery substance from the receiver 14 to the feed transporter 28.
  • a feed fill valve 30 is disposed in the feed transporter line 26 between the receiver 14 and the feed transporter 28 for controlling the amount of powdery substance transferred from the receiver 14 to the feed transporter 28.
  • the feed transporter 28 includes a feed transporter fluidizer 32 having a fluidizing plate 34.
  • the feed transporter fluidizer 32 is connected to a source of fluidizing air 24 for maintaining the powdery substance in a fluidized state within the feed transporter 28 in a similar manner as the receiver 14 as discussed above.
  • Other types of known fiuidizers may also be used as is known to those of skill in the art.
  • the feed transporter 28 is maintained at a positive pressure, generally below about 15 psig.
  • the receiver 14 is disposed above the feed transporter 28 so that gravitational forces cause the fluidized powdery substance disposed in the receiver 14 to flow into the feed transporter 28, where the powdery substance is also maintained in a fluidized state.
  • the receiver has a cone shaped bottom (not shown) leading to the feed transfer line 26.
  • assist air or a positive pressure pump may be used to facilitate the transport of the powdery substance from the receiver 14 to the feed transporter 28.
  • the gas pressure in the receiver 14 is generally the same as that in the feed transporter 28 to facilitate the transfer of the powdery substance.
  • an equalization line 36 interconnects, preferably an upper end of the feed transporter 28 to an upper end of the receiver 14.
  • an equalization valve 38 opens to allow gas to pass between the receiver 14 and the feed transporter 28.
  • a vent line 40 connects the receiver 14 to a vent air destination 42 to maintain the receiver below generally 15 psig or other preferred positive pressure.
  • the vent air destination 42 is contemplated to be either a specific destination where any powdery substance that may have escaped from the receiver 14 is filtered prior to the vent air entering the atmosphere or an application housing 44 where reclamation hoppers are used to transfer reclaimed powdery substance to the source 12 or an equivalent reclaim source (not shown).
  • a vent valve 46 controls the venting of the air from the receiver 14 through the vent line 40 as will be explained further below.
  • a back pressure regulator 50 is disposed in the back pressure line 48, and preferably comprises a pressure actuated valve 51 having a set point of about 15 psig or other predetermined positive pressure for maintaining the equalized gas pressure between the receiver 14 and the feed transporter 28.
  • An applicator line 52 connects the feed transporter 28 to a powder applicator 54 disposed within the applicator housing 44 to apply the powdery substance to the articles also disposed within the applicator housing 44.
  • An applicator valve 56 is disposed between the applicator 54 and the feed transporter 28 to control the flow of the powdery substance through the applicator line 52.
  • the applicator valve 56 opens when an article is being applied in the applicator housing 42 by the applicator 54 and closes when application is terminated. Because the feed transporter is maintained at a positive pressure, and the applicator 54 is disposed at an ambient pressure, a pump is not required to transport the powdery substance through the applicator line 52 to the applicator 54. However, it is contemplated by the inventors that an assist, push air source 58 may be necessary to assist pushing the powdery substance through the applicator line 52, and therefore, is connected to the applicator line 52 by a push air line 60.
  • the push air line 60 intercepts the applicator line 52 preferably between the applicator valve 56 and the applicator 54.
  • the powdery substance is delivered under pressure to the receiver 14 through the receiver fill line 16 from the source 12.
  • less powdery substance is delivered into the receiver 14 from the source 12 than is required to fill the receiver 14 to avoid overflowing the receiver into the vent line 40 or the equalization line 36.
  • the powdery substance is delivered through the receiver fill line 16 by a flow of pressurized air.
  • the pressurized air exits through the vent line 40 while the powdery substance accumulates in the main body of the receiver 14 and is fluidized by the fluidizer 20.
  • the air flowing through the vent line 40 is delivered to a vent air destination 42 or the applicator housing 44 in case a residual amount of powdery substance is drawn into the vent line 40.
  • the receiver fill valve 18 While the receiver 14 is being filled, the receiver fill valve 18 is open, the vent valve 46 is open, the equalization valve 38 is closed, and the feed valve 30 is closed. Furthermore, fluidization air 24 is provided to both the receiver 14 and the feed transporter 28. Generally, about 60 seconds is required to fill the receiver 14 with the powdery substance. Of course, the volume of the receiver 14, the diameter of the receiver fill line 16, and the gas pressure pushing the powdery substance through the receiver fill line 16 impacts the duration of the time required to fill the receiver 14.
  • the gas pressure of the receiver 14 is equalized with the gas pressure of the feed transporter 28.
  • the receiver fill valve 18 and the vent valve 46 are closed while the equalization valve 38 is opened. This sequence allows the air pressure in the receiver 14 and the feed transporter 28 to equalize.
  • the equalization line 36 is sized so that the duration of the gas pressure equalization between the receiver 14 and the feed transporter 28 takes about 15 seconds. This is considered a slow equalization rate to allow the pressure in the feed transporter 28 to remain generally constant.
  • the feed fill valve 30 also remains closed. Furthermore, the fluidizing air 24 remains open to fluidize the receiver 14 and the feed transporter 28.
  • the feed fill valve 30 is opened while the equalization valve 38 remains open and the vent valve 46 and the receiver fill valve 18 remain closed.
  • the feed fill valve 30 opens, the fluidized powdery substance flows through, preferably, gravitational forces into the feed transporter 28 from the receiver 14.
  • positive pressure pumps or additional air pressure may be used to assist the transfer of the powdery substance from the receiver 14 to the feed transporter 28.
  • a load cell 62 interacts with the feed transporter 28 in a known manner to determine the amount of powdery substance disposed in the feed transporter.
  • the feed fill valve 30 is closed and the receiver fill valve 18 and the receiver vent valve 46 are opened to relieve the pressure in the receiver 14 in preparation of transferring a new amount of powdery substance from the source 12 to the receiver 14. It is contemplated by the inventors that the duration of feeding the feed transporter 28 with the powdery substance through the feed transporter line 26 will take approximately 45 seconds. However, the size of the feed transporter line 26 can be varied to adjust the duration required to transfer the required amount of powdery substance to the feed transporter 28 from the receiver 14.
  • the applicator valve 56 is opened and the positive pressure inside the feed transporter 28 forces the fluidized powdery substance through the applicator line 52 to the powder applicator 54. It should be understood that a number of applicator lines 52 and applicator valves 56 may be increased if a plurality of powder applicators 54 are desired within the applicator booth 44. In this manner, the powdery substance and compressed air is directed to the various applicators 54 through a plurality of applicator lines 52.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un assemblage pour appliquer une substance en poudre sur un article. Cet assemblage comprend un contenant fluidiquement relié à une source de substance en poudre pour recevoir la substance en poudre sous pression, et contenant un agent fluidifiant pour maintenir la substance en poudre en état fluidifié. Un transporteur d'alimentation est fluidiquement relié au contenant pour recevoir la substance en poudre provenant du contenant et comportant un agent fluidifiant de transport pour maintenir la substance en poudre en état fluidifié. Un applicateur de poudre est fluidiquement relié au transporteur d'alimentation pour recevoir la substance en poudre sous pression et pour appliquer cette substance en poudre sur un article. Un égalisateur reliant le contenant et le transporteur d'alimentation est destiné à égaliser la pression gazeuse entre le contenant et le transporteur d'alimentation, lorsque la substance en poudre est transférée du transporteur d'alimentation jusqu'au contenant.
PCT/US2006/004219 2005-02-04 2006-02-03 Systeme et methode de transport de peinture en poudre finale a phase dense Ceased WO2006084253A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US65039305P 2005-02-04 2005-02-04
US60/650,393 2005-02-04

Publications (2)

Publication Number Publication Date
WO2006084253A2 true WO2006084253A2 (fr) 2006-08-10
WO2006084253A3 WO2006084253A3 (fr) 2006-09-21

Family

ID=36778026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/004219 Ceased WO2006084253A2 (fr) 2005-02-04 2006-02-03 Systeme et methode de transport de peinture en poudre finale a phase dense

Country Status (1)

Country Link
WO (1) WO2006084253A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1930082A1 (fr) * 2006-12-08 2008-06-11 EISENMANN Anlagenbau GmbH & Co. KG Dispositif d'alimentation de milieux fluidisables
WO2008106243A1 (fr) * 2007-02-27 2008-09-04 Illinois Tool Works Inc. Pompe à phase dense pour matériau pulvérulent
CN109073436A (zh) * 2016-04-19 2018-12-21 通用电气公司 气体驱动的流体输送

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2565947B1 (fr) * 1984-06-18 1986-08-29 Charbonnages De France Dispositif d'alimentation a dosage ponderal d'un produit pulverulent fourni a une conduite pneumatique
US4613259A (en) * 1984-11-28 1986-09-23 United Technologies Corporation Apparatus for controlling powder flow rate in a carrier gas
US4900199A (en) * 1988-10-21 1990-02-13 The Perkin-Elmer Corporation High pressure power feed system
US5957393A (en) * 1994-03-03 1999-09-28 Nordson Corporation Air regulator control system for powder coating operation
JP3867176B2 (ja) * 1996-09-24 2007-01-10 アール・アイ・ディー株式会社 粉体質量流量測定装置、およびこれを適用した静電粉体塗装装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1930082A1 (fr) * 2006-12-08 2008-06-11 EISENMANN Anlagenbau GmbH & Co. KG Dispositif d'alimentation de milieux fluidisables
WO2008106243A1 (fr) * 2007-02-27 2008-09-04 Illinois Tool Works Inc. Pompe à phase dense pour matériau pulvérulent
DE212008000020U1 (de) 2007-02-27 2009-11-26 Illinois Tool Works Inc., Glenview Dichtstrompumpe für feinpulvriges Material
CN109073436A (zh) * 2016-04-19 2018-12-21 通用电气公司 气体驱动的流体输送
CN109073436B (zh) * 2016-04-19 2020-12-11 通用电气公司 气体驱动的流体输送

Also Published As

Publication number Publication date
WO2006084253A3 (fr) 2006-09-21

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