EP0347591A2 - Procédé et dispositif de pulvérisation de peintures et de laques - Google Patents

Procédé et dispositif de pulvérisation de peintures et de laques Download PDF

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Publication number
EP0347591A2
EP0347591A2 EP89109097A EP89109097A EP0347591A2 EP 0347591 A2 EP0347591 A2 EP 0347591A2 EP 89109097 A EP89109097 A EP 89109097A EP 89109097 A EP89109097 A EP 89109097A EP 0347591 A2 EP0347591 A2 EP 0347591A2
Authority
EP
European Patent Office
Prior art keywords
compressed air
spraying
heating wire
wire spiral
spray
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Withdrawn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
EP89109097A
Other languages
German (de)
English (en)
Other versions
EP0347591A3 (fr
Inventor
Rudolf Kühnl
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.)
Wagner International AG
Original Assignee
Wagner International 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 Wagner International AG filed Critical Wagner International AG
Publication of EP0347591A2 publication Critical patent/EP0347591A2/fr
Publication of EP0347591A3 publication Critical patent/EP0347591A3/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Withdrawn legal-status Critical Current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
    • 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
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • 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
    • B05B7/16—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 incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—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 incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • B05B7/1613—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 incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
    • B05B7/1646—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 incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed the material to be sprayed and the atomising fluid being heated by the same source of heat, without transfer of heat between atomising fluid and material to be sprayed
    • 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

Definitions

  • the invention relates to a method for preferably electrostatic spraying of paints and varnishes using compressed air according to the preamble of claim 1.
  • the invention relates to a device for carrying out such a method according to the preamble of claim 3.
  • Such methods and devices have long been known and are used in practice.
  • the method mentioned, also referred to in practice as hot spraying is used in particular when the respective paint cannot be sprayed satisfactorily at normal temperature due to its ability (viscosity).
  • Corresponding devices then have a feed hose to the spray gun for the purpose of heating the spray material, which is wrapped by an electrical heating wire spiral.
  • the paint in the supply hose must be heated to a considerable temperature if the effect of improved spraying is to be achieved.
  • the object of the invention is therefore to improve the known methods and devices for hot spraying in such a way that the heating material can also be used at lower heating temperatures. This object is achieved in terms of the method in accordance with the characterizing part of patent claim 1 and in terms of the device in accordance with the characterizing part of patent claim 3.
  • the spray material not only is the spray material heated, as usual, but also the compressed air supplied. This ensures that the spray material does not cool down when it emerges from the spray nozzle, and is possibly even further heated by the compressed air.
  • spray paints and paints can be used with heating temperatures which are below the respective flash point, which means that hot spraying can essentially be used in more cases than previously.
  • 10 denotes a supply hose for spray material and 11 a supply hose for compressed air, the two hoses 10, 11 running parallel to one another with a small spacing.
  • the spray material hose 10 has at its two ends a transition connection 10a to the spray material source (not shown) (paint container, paint pump) and a transition connection 10b to the spray gun (not shown), the compressed air hose 11 has a transition connection 11a to the compressed air supply source (compressed air network, compressed air pump) and a transition connection 11b to the spray gun).
  • the two hoses 10, 11 are wrapped in the area between the transition connections by a common heating wire spiral 12, which in turn is surrounded by an insulating layer 13.
  • a braid jacket 14 serves as the outer covering.
  • 15a and 15b represent end covers.
  • 16 denotes an electrical supply for the heating wire spiral 12.
  • the heating wire spiral 12 is supplied with electrical current via the line 16, with the result that the heating spiral 12 heats up and thus heats both the spray material flowing in the hose 10 and the compressed air flowing in the hose 11.
  • the heating temperature of the sprayed material and compressed air depend on a whole range of factors, in particular the amount of electrical energy supplied, the dimensioning of the heating wire spiral, the thermal resistance of the hose material and the flow rate of the spray material and air, but these factors are comparatively easy to master, so it is in practice no problem to measure these factors so that the desired and specified heating temperatures are reached .
  • the factors can be selected such as the specific thermal conductivity or the thickness of the two hose sleeves so that the sprayed material and compressed air reach the same heating temperature or that the sprayed material and compressed air have heating temperatures of the specified temperature difference. In the latter case, it may be advantageous to heat the compressed air more than the spray material, with which the spray material only reaches the optimum temperature for spraying when it is sprayed.
  • the device shown can undergo modifications without leaving the scope of the invention.
EP19890109097 1988-06-24 1989-05-19 Procédé et dispositif de pulvérisation de peintures et de laques Withdrawn EP0347591A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3821439 1988-06-24
DE3821439A DE3821439C1 (fr) 1988-06-24 1988-06-24

Publications (2)

Publication Number Publication Date
EP0347591A2 true EP0347591A2 (fr) 1989-12-27
EP0347591A3 EP0347591A3 (fr) 1991-03-27

Family

ID=6357220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890109097 Withdrawn EP0347591A3 (fr) 1988-06-24 1989-05-19 Procédé et dispositif de pulvérisation de peintures et de laques

Country Status (4)

Country Link
EP (1) EP0347591A3 (fr)
JP (1) JPH0278464A (fr)
DE (1) DE3821439C1 (fr)
DK (1) DK312689A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997044818A1 (fr) * 1996-05-21 1997-11-27 Symetrix Corporation Procede et appareil a rendement ameliore de depot de films minces generes a partir d'une source de liquide brumise

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE488622A (fr) *
US2576942A (en) * 1948-07-06 1951-12-04 American Can Co Apparatus for the continuous spraying of individual container bodies
FR88147E (fr) * 1963-12-14 1966-12-16 Dispositif de chauffage d'un courant fluide
EP0160731A1 (fr) * 1984-04-30 1985-11-13 MELTEX Verbindungs-technik GmbH Tuyau flexible pour colles à fusion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5298755A (en) * 1976-02-17 1977-08-18 Iwata Air Compressor Mfg Hot air spray gun
JPS61259776A (ja) * 1985-05-13 1986-11-18 Nippon Sheet Glass Co Ltd 無機質繊維製品への表皮材の接着方法及びホットメルト型接着剤のスプレー装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE488622A (fr) *
US2576942A (en) * 1948-07-06 1951-12-04 American Can Co Apparatus for the continuous spraying of individual container bodies
FR88147E (fr) * 1963-12-14 1966-12-16 Dispositif de chauffage d'un courant fluide
EP0160731A1 (fr) * 1984-04-30 1985-11-13 MELTEX Verbindungs-technik GmbH Tuyau flexible pour colles à fusion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997044818A1 (fr) * 1996-05-21 1997-11-27 Symetrix Corporation Procede et appareil a rendement ameliore de depot de films minces generes a partir d'une source de liquide brumise
US5932295A (en) * 1996-05-21 1999-08-03 Symetrix Corporation Method and apparatus for misted liquid source deposition of thin films with increased yield

Also Published As

Publication number Publication date
DE3821439C1 (fr) 1989-01-19
EP0347591A3 (fr) 1991-03-27
DK312689D0 (da) 1989-06-23
DK312689A (da) 1989-12-25
JPH0278464A (ja) 1990-03-19

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