EP0791400B1 - Procédé et appareil pour revêtir un objet - Google Patents

Procédé et appareil pour revêtir un objet Download PDF

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Publication number
EP0791400B1
EP0791400B1 EP96120821A EP96120821A EP0791400B1 EP 0791400 B1 EP0791400 B1 EP 0791400B1 EP 96120821 A EP96120821 A EP 96120821A EP 96120821 A EP96120821 A EP 96120821A EP 0791400 B1 EP0791400 B1 EP 0791400B1
Authority
EP
European Patent Office
Prior art keywords
line
fluid flow
coating
particle
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.)
Expired - Lifetime
Application number
EP96120821A
Other languages
German (de)
English (en)
Other versions
EP0791400A1 (fr
Inventor
Felix Walser
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.)
Elpatronic AG
Original Assignee
Elpatronic AG
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 Elpatronic AG filed Critical Elpatronic AG
Publication of EP0791400A1 publication Critical patent/EP0791400A1/fr
Application granted granted Critical
Publication of EP0791400B1 publication Critical patent/EP0791400B1/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
    • 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
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0618—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies only a part of the inside of the hollow bodies being treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/10—Arrangements for collecting, re-using or eliminating excess spraying material the excess material being particulate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/12—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes

Definitions

  • the invention relates to a method for Applying a coating to an object according to Preamble of claim 1. Furthermore, the Invention a device for applying a Coating on an object according to the preamble of Claim 5.
  • the Coating particles are on the to be coated Applied object, possibly under influence electrostatic charge, and there, e.g. by a heat treatment, a durable coating.
  • a procedure is particularly known for Coating or spraying the inner seam of can frames or the entire inner wall of can frames Coating material.
  • It has to be Coating material usually a powder, over a long management are promoted because of access to the closed frame only by the welding machine can be done through.
  • the long line requires one high speed of the fluid, usually air, around the powder in sufficient quantity along the long line to promote. A high air speed or However, particle velocity is at the exit point disadvantageous because it causes the powder particles from the coating surface can bounce back what deposition efficiency deteriorates.
  • EP-A-0 732 151 shows a coating device, where some of the fluid is at the beginning of the Delivery line is removed.
  • the fluid velocity in the following line area reduces what the coating particles expel effected at low speed and thus the Degree of application increased. So the invention does that Separation of transport-related, in Exit or spray area but disruptive fluid from the Fluid powder mixture.
  • the lower speed and the associated increase in pressure continues to have an effect a swirling of the inflowing particles, what a better homogeneity of the exiting particle stream results.
  • Figure 1 shows schematically the structure of a Plant for the production and coating of can bodies.
  • the invention is illustrated below using this example explained in more detail, this being only as a preferred embodiment is to be understood.
  • the invention can also the coating of other objects.
  • Figure 1 shows a conveyor 1, which in the figure only schematically as a continuous conveyor belt is shown. With a real investment this Several types of funding can be provided with appropriate transfer elements be provided one after the other.
  • the one on the Conveyor 1 supported can bodies 2-7 manufactured in a known manner so that in a rounding station 8 a flat sheet is deformed into a can frame whose longitudinal seam is not yet closed.
  • the longitudinal seam can be closed further along the conveyor line at least in the roller seam welding machine 9 overlapped so that the Seam of the can frame using welding rollers 10 and 11 and are usually welded to a wire electrode can.
  • the welded can frames leave the Welding machine and arrive at a coating station.
  • the coating station either only the Weld seam or the entire inner wall of the frame provided with a coating material.
  • can this can be a coating powder which is inside the can is applied. This can cause an electrostatic charge of the powder are provided to ensure good adhesion to reach the powder on the inside of the can.
  • a Subsequent station 13 then undergoes a heat treatment performed the can frame, which a melting of the Powder causes.
  • the coating is done by Cooling down to the finished hard coating.
  • the powder-air mixture ejected and hits as ejected cloud 17, whose Shape depending on the design of the discharge area of the line 16 or the desired result of the inner coating can vary on the inside of the can frame.
  • the described method and the one shown Plant known. According to the invention, a Part of the fluid flow in line 16 in front of the outflow area taken from the line.
  • a suction line 18 is provided, which on a Place 19 in line 16 and which on the other End is connected to a vacuum source 20, which is the suction of part of the fluid flow in the Line 16 causes.
  • the extracted fluid can after Vacuum source 20 are released into the environment, wherein a filter can be provided, which with the Fluid powder particles sucked together holds back.
  • the suction of part of the fluid flow brings about the advantages described at the beginning. In particular can thereby the conveying speed for the Powder held up by means of the compressed air in line 16 be what the proper conveyance of the powder along the long line.
  • suction becomes the speed of the powder-air mixture after the suction point 19, i.e.
  • the amount the extracted fluid flow can be adjusted the vacuum source can be varied.
  • the setting can be done empirically such that despite the suction, enough powder on the inside of the frame is deposited.
  • FIG. 2 shows a preferred embodiment the front area of line 16, which contains the powder-air mixture promotes.
  • the powder-air mixture is conveyed again through line 16, at the exit end thereof 23 the discharge of a mixture of powder and air he follows.
  • the suction of part of the stream in the Line 16 also takes place here by means of line 18, which opens into line 16 in an area 19 '.
  • part of the wall of the line 16 is for Formation of a corresponding opening 24 omitted.
  • Connecting element 25 connects the two lines 18 and 16 with each other and forms a closed one Connection space 19 'through which the line 18 via the Opening 24 in connection with the interior of the line 16 stands.
  • the total stream A is now divided from powder and air into the two sub-streams B and C such that the recirculated partial stream B essentially only from the There is fluid or air and contains no powder particles.
  • the partial stream B is removed here after a curved region 26 of line 16, the centrifugal effect this pipe curvature is used. Accordingly move the heavier compared to the transport gas Powder particles predominantly on the right one in the drawing Along the manifold wall and thus in area 27.
  • Im in der Drawing left cross-sectional area 28 of the manifold flows mainly transport gas free of powder particles, which is essential without the amount of powder conveyed to be reduced, sucked off through line 18 can.
  • This embodiment results in a separation of transport-related, in the spray area but disruptive gas from the gas-powder mixture.
  • the flow rate the gas-powder mixture in stream C is reduced, so the relative velocity of the gas powder flow to be coated at a certain speed transported can frame greatly reduced becomes.
  • This reduction ensures that the Powder particles less of the surface to be coated bounce off and thus improves the application efficiency becomes. They continue at a certain speed conveyed powder particles due to the pressure increase and the associated decrease in speed slowed down in partial flow C due to the impulse effect and thereby creating an almost homogeneous gas-air cloud over the Whole line cross section swirled in area C. Thereby a more uniform powder layer thickness is achieved.
  • the pipe curvature shown is simple Means for separating the powder-air mixture in an area that mainly contains only air and one Area that contains powder and air.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Coating Apparatus (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (6)

  1. Procédé pour appliquer un revêtement à un objet (2-7), dans lequel un matériau de revêtement sous forme de particules est entraíné au moyen d'un courant de fluide (A), dans une conduite de convoyage (16), et sort de la conduite, dans une zone de revêtement, caractérisé en ce qu'à l'extrémité de la conduite de convoyage une partie (B) du courant de fluide est prélevée de cette conduite en amont de la zone de sortie, et dans lequel une séparation en un courant de fluide pauvre en particules et un courant de fluide riche en particules est réalisée dans la zone de prélèvement et la partie prélevée (B) du courant de fluide provient du courant de fluide pauvre en particules, et dans lequel la séparation du courant de fluide est réalisée par l'aménagement d'au moins une partie courbe (26) dans la conduite (16).
  2. Procédé selon la revendication 1, caractérisé en ce que le prélèvement de la partie (B) du courant de fluide s'effectue à l'aide d'une conduite à dépression (18), qui débouche dans la conduite et au moyen de laquelle la partie du courant de fluide est aspirée.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le courant de fluide est un courant de gaz, à l'aide duquel un matériau de revêtement pulvérulent est entraíné.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on recouvre une série d'objets (2-7) qui sont entraínés dans une installation de convoyage (1), notamment des corps de boítes.
  5. Dispositif pour appliquer un revêtement sur un objet (2-7), dans lequel le matériau de revêtement sous forme de particules est entraíné depuis un réservoir (14) à l'aide d'un courant de fluide (A) provenant d'une source de fluide (15) le long d'une conduite de convoyage (16), et sort de la conduite dans une zone de revêtement et rencontre l'objet (2-7) à recouvrir, caractérisé en ce qu'à l'extrémité de la conduite de convoyage (16) et en amont de l'ouverture de sortie (23) de cette conduite est prévue une ouverture (24), à laquelle est raccordée une conduite d'aspiration (18), au moyen de laquelle une partie (B) du courant de fluide peut être prélevée de la conduite, et dans lequel dans la zone de l'accouplement de la conduite d'aspiration (18) est prévue une partie courbe (26) de la conduite (16), qui divise le courant de fluide en un courant de fluide pauvre en particules et un courant de fluide riche en particules, et dans lequel la conduite d'aspiration (18) est accouplée de telle sorte qu'elle agit sur le courant de fluide pauvre en particules.
  6. Dispositif selon la revendication 5, caractérisé par un dispositif de convoyage (1) pour les objets (2-7) qui doivent être pourvus d'un revêtement, et une conduite de fluide (16) qui suit au moins en partie le dispositif de convoyage.
EP96120821A 1996-02-21 1996-12-23 Procédé et appareil pour revêtir un objet Expired - Lifetime EP0791400B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH447/96 1996-02-21
CH44796 1996-02-21
CH44796 1996-02-21

Publications (2)

Publication Number Publication Date
EP0791400A1 EP0791400A1 (fr) 1997-08-27
EP0791400B1 true EP0791400B1 (fr) 2000-05-03

Family

ID=4187246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120821A Expired - Lifetime EP0791400B1 (fr) 1996-02-21 1996-12-23 Procédé et appareil pour revêtir un objet

Country Status (5)

Country Link
US (1) US5863600A (fr)
EP (1) EP0791400B1 (fr)
JP (1) JPH09234413A (fr)
DE (1) DE59605130D1 (fr)
TW (1) TW341551B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090123777A1 (en) * 2007-11-14 2009-05-14 Uct Coatings Llc. Method of improving the performance of a hydrodynamic surface
CN109548206B (zh) * 2018-12-28 2021-03-23 泉州铭狮卫浴有限公司 石墨烯发热管的制作方法及石墨烯发热管、空气涂抹设备

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901184A (en) * 1974-07-23 1975-08-26 Continental Can Co Pneumatic powder flow diverting device
JPS5243846A (en) * 1975-10-03 1977-04-06 Senichi Masuda Device for electrostatic powder coating
US4259923A (en) * 1980-04-08 1981-04-07 The Continental Group, Inc. Reverse spray electrostatic air/powder stripe applicator
US4411935A (en) * 1981-11-02 1983-10-25 Anderson James Y Powder flame spraying apparatus and method
EP0093083B2 (fr) * 1982-04-27 1993-11-24 Siegfried Frei Procédé pour appliquer une couche en poudre et appareil pour l'application de poudre
US4500038A (en) * 1982-11-01 1985-02-19 Avco Corporation Powder feed system with recirculator for plasma spray apparatus
JPS59177164A (ja) * 1983-03-21 1984-10-06 ジ−グフリ−ト・フライ 円筒形の缶の本体の溶接継目上に条片状の粉末の層を付着させる方法と装置
CH663910A5 (de) * 1985-02-21 1988-01-29 Praezisions Werkzeuge Ag Beschichtungsanordnungen sowie deren verwendung.
JPH0615050B2 (ja) * 1986-02-05 1994-03-02 ノードソン株式会社 粉粒体の断続スプレイ塗布方法とそのガン
US4886013A (en) * 1989-01-12 1989-12-12 Nordson Corporation Modular can coating apparatus
US5474609A (en) * 1992-06-30 1995-12-12 Nordson Corporation Methods and apparatus for applying powder to workpieces
US5725670A (en) * 1994-02-18 1998-03-10 Nordson Corporation Apparatus for powder coating welded cans

Also Published As

Publication number Publication date
TW341551B (en) 1998-10-01
US5863600A (en) 1999-01-26
DE59605130D1 (de) 2000-06-08
JPH09234413A (ja) 1997-09-09
EP0791400A1 (fr) 1997-08-27

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