EP0192969A2 - Procédé et appareil pour prévenir le dépôt du revêtement sur la tête de pulvérisation - Google Patents

Procédé et appareil pour prévenir le dépôt du revêtement sur la tête de pulvérisation Download PDF

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Publication number
EP0192969A2
EP0192969A2 EP86101002A EP86101002A EP0192969A2 EP 0192969 A2 EP0192969 A2 EP 0192969A2 EP 86101002 A EP86101002 A EP 86101002A EP 86101002 A EP86101002 A EP 86101002A EP 0192969 A2 EP0192969 A2 EP 0192969A2
Authority
EP
European Patent Office
Prior art keywords
cross
mouth
line
suction line
arrangement
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.)
Granted
Application number
EP86101002A
Other languages
German (de)
English (en)
Other versions
EP0192969B1 (fr
EP0192969A3 (en
Inventor
Hardy P. Dr. Weiss
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.)
Prazisions-Werkzeuge AG
Praezisions Werkzeuge AG
Original Assignee
Prazisions-Werkzeuge AG
Praezisions Werkzeuge 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 Prazisions-Werkzeuge AG, Praezisions Werkzeuge AG filed Critical Prazisions-Werkzeuge AG
Priority to AT86101002T priority Critical patent/ATE58655T1/de
Publication of EP0192969A2 publication Critical patent/EP0192969A2/fr
Publication of EP0192969A3 publication Critical patent/EP0192969A3/de
Application granted granted Critical
Publication of EP0192969B1 publication Critical patent/EP0192969B1/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
    • 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
    • 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
    • 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
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/07—Hoods

Definitions

  • the present invention relates to coating arrangements with a carrier body, at least one feed line for a spray jet of a gaseous carrier medium and liquid or solid coating particles that opens at the surface thereof, and at least one suction line for carrier medium and coating particles that opens at the body surface, with normals relating to the cross-sectional areas of the lines in their Inlet or outlet areas lie at least almost in one plane, as well as a coating arrangement with a carrier body, at least one feed line for a spray jet, consisting of a gaseous carrier medium and liquid or solid coating particles, opening at the surface of the carrier body, with a recess molded into the surface, subsequent to the outlet is, the longitudinal axis of which lies in one plane with the center axis of the feed line in the mouth region, to form a coating chamber, together with one guided above it , to be coated body, further a method for preventing the deposition of coating material on a coating head with a feed line with an outlet opening for a spray jet of a gaseous carrier medium and liquid or solid coating
  • the coating arrangements mentioned at the outset are known. They are used, for example, for the powder coating of metal can bodies, in particular of their weld seam, in a continuous process in which the can bodies are continuously moved through the arrangement carrier body.
  • This coating arrangements have in addition to a feed line for the spray jet at least one, usually two, Absau g INTR g s, with the upstream and the other downstream with respect to the lead-through is a movement of the body to be coated and the Zudies effettechnischemündung.
  • a problem which arises with such a coating arrangements is that between A of the feed line and merging usmündung the A b-suction sog.aerodynamische dead spaces are formed, in which, the coating particles are deposited on the support surface of the arrangement and more and more change its aerodynamic profile.
  • the object of the present invention is to prevent this. It is solved on the one hand by the coating arrangement of the first type, which is distinguished by the wording of claim 1.
  • the third coating arrangement mentioned preferably for carrying out the mentioned method, is characterized according to the wording of claim 11, likewise for achieving the stated object.
  • the principle of steady flow acceleration is preferably continued, in accordance with the wording of claim 13, also in a region of the suction line adjoining the junction.
  • the coating arrangement is further preferably designed according to the wording of claim 14, which makes it possible to incorporate the ever narrowing halves of the suction line into one surface of each of the parts and to close the suction line by overlapping the parts shut down.
  • a preferred coating arrangement is further distinguished by the wording of claim 15.
  • a coating head 1 comprises a carrier body 3.
  • the carrier body 3 is elongated along an axis A and has a groove-like indentation 5 on its surface. S body to be coated surfaces are guided along a path through over the groove or Einappelung 5 and are in this respect upstream and downstream surfaces about 7 o and u like (not shown) by means of brushes 7 performed.
  • the channel 5 extends with its longitudinal extension in the direction of the axis A and is symmetrical in this regard.
  • the surfaces 7 0, 7 and define a connecting surface 7 over the channel 5.
  • s i viewed in the direction, opens a suction line 9 into the end face of the groove.
  • a feed line 11 opens out into the channel 5, the latter, at the end, finally opening into a further suction line 13.
  • the cross-sectional areas of Q 9 or Q 11 and Q13 of the duct 9 and 11 and 13, respectively, have surface normals N 9, N 11 b zw. N 13, which lie in a common plane E. (See Figure 4) This is the section plane of Figure 1.
  • the intersection curve of the plane E with the surface 15 of the support body 3 connecting the mouths of the lines 9 and 11 is designed such that its radius of curvature R, starting from the mouth area of the line 11 , towards the mouth of line 9, corresponding to the transition from R 1 to R 2 according to FIG. Only after the mouth area of the line 9 and without influencing the aerodynamic conditions in the channel 5 or the coating chamber formed by it and a body to be coated guided over it, does the radius define the cutting curve or the surface 15. With regard to the flow downstream of the mouth of line 9, in area B, line 9 can be continued as desired within wide limits.
  • the curve 15 is preferably designed as a logarithmic spiral, at least in a section between the mouths.
  • the sectional figure 19 of the plane E formed by the surface normals with the body 3 between the feed line 11 and the suction line 13 is, as can be seen in FIG. 1, arched like a wing profile, with a larger radius of curvature against the mouth of the line 11.
  • the former facing the web s, results in a lip-like termination of the channel 5 with the lip 21 of the suction line mouth.
  • Suction bores 25 protrude from the suction line 13 into the surface 7 in order from there to suck back insufficiently adhering coating material from the surface to be coated.
  • the suction line 13 changes from the oval cross section Q c to a circular cross section Q d while continuously reducing the area of the line cross section. 1 and 3, the hatched areas Q a - Q d are folded into the respective figure levels.
  • the mouth of the suction line 9, M ' 9 , or Mg is oval or elliptical.
  • the line cross section of the line 9 then merges continuously into the circular cross section K 9 . 4, at least this part of the head 3 is formed in two parts, so that the lines can each be worked in half into one part and are closed by superimposing one another.
  • the flow runs through the feed line 11 with its center line A 11 and extends along the airfoil profile 19, that is to say the flow threads, along a path whose curvatures change their signs in accordance with Ra or R b .
  • this is extremely disadvantageous, in particular in the area of the outlet of line 11. Because due to centrifugal forces, a reversal of the sign of the current filament curvature forces a reversal of the sign of the direction of turbulence in the spray jet cross-sectional area, with an uncontrollable turbulence when the vortex direction is zero. Therefore, differing from the Fig. L and 2 extended routing of the cable 11 shown in Fig.
  • the line 11 preferably in a portion in front of its mouth into the gutter t 5 so.le g, that the Sprühstrahlbahn- Flow thread continued into the channel 5 in the above sense does not undergo a sign reversal of its curvature.
  • the line is at least straight in a section of the line 11 before its junction, which is substantially longer than its cross-sectional diameter, or even, as shown in dash-dot lines, with a curvature corresponding to its continuation along the wing profile 19.
  • the straight line routing is designated 11 a, the curved according to the wing profile, with llb.
  • the problem of continuously reducing the cross-section of the suction line 13 from FIGS. 1 and 3 is further solved in a structurally simple manner in that the carrier body 3, as shown in FIG. 1, is produced from two partial bodies 3 o and 3 u , into which half of the converging suction line 13 is incorporated and which are finally placed on top of one another and connected as with screws.
  • the two-part nature of the body 3 is also indicated by the two-part hatching of the cross-sectional areas Q cl Q d in FIG. 1.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Nozzles (AREA)
  • Exhaust Silencers (AREA)
  • Non-Metallic Protective Coatings For Printed Circuits (AREA)
EP86101002A 1985-02-21 1986-01-25 Procédé et appareil pour prévenir le dépôt du revêtement sur la tête de pulvérisation Expired - Lifetime EP0192969B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86101002T ATE58655T1 (de) 1985-02-21 1986-01-25 Beschichtungsvorrichtung und verfahren zur verhinderung der ablagerung von beschichtungsmaterial auf dem beschichtungskopf.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH834/85A CH663910A5 (de) 1985-02-21 1985-02-21 Beschichtungsanordnungen sowie deren verwendung.
CH834/85 1985-02-21

Publications (3)

Publication Number Publication Date
EP0192969A2 true EP0192969A2 (fr) 1986-09-03
EP0192969A3 EP0192969A3 (en) 1988-10-12
EP0192969B1 EP0192969B1 (fr) 1990-11-28

Family

ID=4196281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101002A Expired - Lifetime EP0192969B1 (fr) 1985-02-21 1986-01-25 Procédé et appareil pour prévenir le dépôt du revêtement sur la tête de pulvérisation

Country Status (6)

Country Link
US (1) US4749593A (fr)
EP (1) EP0192969B1 (fr)
JP (1) JPH07108379B2 (fr)
AT (1) ATE58655T1 (fr)
CH (1) CH663910A5 (fr)
DE (1) DE3675793D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791400A1 (fr) * 1996-02-21 1997-08-27 Elpatronic Ag Procédé et appareil pour revêtir un objet
WO2021197887A1 (fr) * 2020-04-03 2021-10-07 Khs Gmbh Appareil de pulvérisation pour une station de pulvérisation d'une machine de nettoyage de récipients et procédé de pulvérisation et/ou de pulvérisation de récipients

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5847370A (en) * 1990-06-04 1998-12-08 Nordson Corporation Can coating and curing system having focused induction heater using thin lamination cores

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791400A1 (fr) * 1996-02-21 1997-08-27 Elpatronic Ag Procédé et appareil pour revêtir un objet
US5863600A (en) * 1996-02-21 1999-01-26 Elpatronic Ag Method and apparatus for uniformly applying a coating to a can body
WO2021197887A1 (fr) * 2020-04-03 2021-10-07 Khs Gmbh Appareil de pulvérisation pour une station de pulvérisation d'une machine de nettoyage de récipients et procédé de pulvérisation et/ou de pulvérisation de récipients

Also Published As

Publication number Publication date
JPH07108379B2 (ja) 1995-11-22
DE3675793D1 (de) 1991-01-10
EP0192969B1 (fr) 1990-11-28
EP0192969A3 (en) 1988-10-12
US4749593A (en) 1988-06-07
JPS61192362A (ja) 1986-08-26
ATE58655T1 (de) 1990-12-15
CH663910A5 (de) 1988-01-29

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