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EP1252936A2 - Cylindre pour un système de revêtement et méthode d'utilisation - Google Patents

Cylindre pour un système de revêtement et méthode d'utilisation Download PDF

Info

Publication number
EP1252936A2
EP1252936A2 EP02007051A EP02007051A EP1252936A2 EP 1252936 A2 EP1252936 A2 EP 1252936A2 EP 02007051 A EP02007051 A EP 02007051A EP 02007051 A EP02007051 A EP 02007051A EP 1252936 A2 EP1252936 A2 EP 1252936A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
wall
openings
space
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
EP02007051A
Other languages
German (de)
English (en)
Other versions
EP1252936A3 (fr
EP1252936B1 (fr
Inventor
Hans-Jürgen Dr. Nolte
Harry Krumma
Frank Herre
Michael Baumann
Stefano Giuliano
Manfred Michelfelder
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 AG
Original Assignee
Duerr Systems 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 Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP1252936A2 publication Critical patent/EP1252936A2/fr
Publication of EP1252936A3 publication Critical patent/EP1252936A3/fr
Application granted granted Critical
Publication of EP1252936B1 publication Critical patent/EP1252936B1/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
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1675—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive the supply means comprising a piston, e.g. a piston pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0413—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with reciprocating pumps, e.g. membrane pump, piston pump, bellow pump
    • 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
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids

Definitions

  • the invention relates to a cylinder unit with a piston and using a method of dosing a coating medium such a cylinder unit.
  • the cylinder unit is in particular a dosing cylinder for supplying paint to an atomizer in a coating system for example for electrostatic, if necessary Series coating of vehicle bodies.
  • the coating material can be atomized are known to be supplied by metering cylinders, the Up to now, pistons have generally been driven by a motor and spindle was pushed through the cylinder (DE 196 10 588 A; EP 0 693 319 A).
  • the piston of a cylinder unit also known from practice this type (Dürr / Behr) has at both ends a lip lying against the inside wall of the cylinder. Have both lips towards the one containing the coating material Edges bent on the side of the cylinder. While the one lip as Sealing lip the cylinder space containing the coating material shuts off, the lip on the other side of the piston serves as Guide lip for guiding the piston in the cylinder.
  • Dosing cylinders are already known, the pistons of which are pneumatic or to be driven by a dosing liquid (JP 8-229446 A; EP 0 967 016 A).
  • a dosing liquid JP 8-229446 A; EP 0 967 016 A.
  • one with a Piston rod guided piston is used to clean the inside wall of the cylinder in the between the lips of the piston and the cylinder inner wall formed annular space filled with a cleaning liquid.
  • the annulus stands over an inner channel of the piston and through the hollow piston rod in connection with a liquid tank.
  • the cleaning fluid should be replaced from time to time when mixing with the piston Color material is found.
  • the invention has for its object a cylinder unit or to specify a dosing method of the genus under consideration, the enable safe and reliable metering operation, and even if the piston is made of a liquid or gaseous Print medium is driven, by the between the Piston lips on the piston circumference formed a rinsing or Cleaning medium should be able to be passed through without it Piston rod is required.
  • One possibility is to dock the piston to openings in one the end walls of the cylinder interior, the line connections through leak-free automatic fluid couplings can be produced.
  • the end wall is preferably on of the cylinder side containing the coating material (paint) selected because this dosing circuit is rinsed with every color change and therefore the risk of mixing with air is less critical is.
  • the alternative option of Arrangement of the openings in the cylindrical inner wall particularly be appropriate.
  • the piston then does not require anti-rotation for the connection with the openings.
  • the openings can be arranged in one place in this case, for example at which they are in with the annulus on the circumference of the piston Connect when the piston is in one of its two End positions. If the end position on the color page of the cylinder is chosen, this can be because of less complex Routing to the valves connected to the openings be beneficial.
  • the two piston lips serve not only for guiding the piston, but also for sealing, in particular also against the pressure medium mentioned. ever if appropriate, the piston can also have more than two lips and / or have other management members.
  • the flushing liquid that is directed through the annular gap of the piston but there are also important other advantages. For example can be monitored by monitoring the pressure of this fluid carry out a leak monitoring because of an abnormal pressure drop a leak in a sealing lip is to be concluded. defects the piston lips can also be identified by others Determine changes in the rinsing liquid, for example by measuring turbidity, electrical resistance or concentration which may be caused by the coating material (e.g. water-based paint) or hydraulic fluid contaminated flushing fluid. These monitoring functions increase production and process reliability, while the improved cleaning effect increases tool life, improved color change behavior, etc. can be achieved.
  • the coating material e.g. water-based paint
  • the Piston When the piston is driven by a dosing liquid, the Piston for reliable separation of this medium from the driven one Medium.
  • the invention is suitable also for cylinder units with mechanically driven pistons.
  • a piston sits in the cylinder 1 in an axially displaceable manner 2, which is located on its opposite sides, except for connection openings 6 serving as inlet or outlet, 6 'and 8 closed cylinder spaces 11 and 11' from each other separates.
  • the generally cylindrical piston 2 has its circumference opposite end faces one each for sealing as well also lip 4 or 4 'serving for piston guidance. These lips are shown in opposite axial directions Directions bent, being flat on the cylinder inner wall issue.
  • the cylinder On one side of the piston 2, which is on the right in FIG. 1, the cylinder has Connection openings 6 and 6 'for a hydraulic pressure fluid to the piston drive.
  • the driven medium for example colored paint, that of the piston through the connection opening 8 from the cylinder is pushed out. In the opposite direction this or a other medium also serve to push the piston back.
  • connection openings 14 and 15 are each corresponding via a movable hose 16 the piston stroke of sufficient length (only one Hose is shown), each with a connection opening 18 or 19 connected in the end wall 20 of the cylinder 1.
  • the channels 12 and 13 and the annular space 10 formed circuit flows in operation from the parent Control program prescribed times or continuously one Flushing liquid for cleaning the inside of the cylinder.
  • the inner channels 12 and 13 open at axially different Place the annular gap 10, preferably close to its axial ends, so that the described by the pipe system circulating fluid substantially along the Cylinder inner wall flows through the gap-shaped annular space 10. It but can also more than only one channel 12 or 13 between the connection openings 14, 15 and the annular space 10 are provided his.
  • the pressure and / or at least another characteristic of the cycle described flowing flushing medium are monitored.
  • the pressure of through the annulus 10 flowing flushing medium is in normal operation less than the pressure of the media in the cylinder chambers 11 and 11 '.
  • the liquid in the annular space 310 can for example, filled or renewed through openings 30 that are bores through the cylindrical cylinder wall can lead into the interior of the cylinder 301, as in FIG. 3 is shown. So that the liquid gets into the annular space 310 or flows out, are in external connection lines for the openings 30 or preferably in the openings 30 themselves or in the vicinity of the valves 34 opened when the Piston 302 in a defined one aligned with orifices 30 Position, for example in one of its end positions, which can be defined by stops 32.
  • the openings 30 can also be anywhere else on the cylinder 301 can be provided, and they can also through an annular gap be educated.
  • the two valves 34 of the example considered are useful arranged so that their valve seat in the opening 30 of the Cylinder 301 is located near its inner wall. This results in there are only small dead spaces in the opening 30 and it will avoided that the piston 302 with its sealing lips over considerable disruptive edges must drive.
  • connection openings 40, 41 which are in one end face and with internal channels with the Annulus 410 are connected to with fluid couplings (not shown) provided axial connections in the cylinder front wall to couple (for example at the location of the stops 32 in Fig. 3).
  • the openings 43 are located in the end wall 45 delimiting the ink-side cylinder space 411 of cylinder 401 (the color connections of which are not shown here are).
  • One is for aligning the piston 402 with the openings 43 non-rotating centering provided, e.g. with one indicated at 47 Centering.
  • liquid couplings for the openings 40, 41 and 43 can constructions known per se and proven in practice (for example as with the attachable cartridges after the aforementioned DE 196 10 588).

Landscapes

  • Details Of Reciprocating Pumps (AREA)
  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Fertilizers (AREA)
  • Coating Apparatus (AREA)
EP02007051A 2001-03-29 2002-03-27 Cylindre pour un système de revêtement et méthode d'utilisation Expired - Lifetime EP1252936B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10115465 2001-03-29
DE10115465A DE10115465A1 (de) 2001-03-29 2001-03-29 Zylindereinheit für eine Beschichtungsanlage und Dosierverfahren unter Verwendung dieser Einheit

Publications (3)

Publication Number Publication Date
EP1252936A2 true EP1252936A2 (fr) 2002-10-30
EP1252936A3 EP1252936A3 (fr) 2004-09-22
EP1252936B1 EP1252936B1 (fr) 2007-01-03

Family

ID=7679493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007051A Expired - Lifetime EP1252936B1 (fr) 2001-03-29 2002-03-27 Cylindre pour un système de revêtement et méthode d'utilisation

Country Status (4)

Country Link
EP (1) EP1252936B1 (fr)
AT (1) ATE350172T1 (fr)
DE (2) DE10115465A1 (fr)
ES (1) ES2278827T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008007813A1 (fr) * 2006-07-14 2008-01-17 Trinity Industrial Corporation Dispositif de détection de fuite pour matériau de revêtement et système de remplissage de matériau de revêtement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008046246B4 (de) * 2008-09-08 2011-05-19 Dräger, Karl-Heinz Vorrichtung und Verfahren zum Verteilen von Reiz- oder Kampfstoffen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821006C1 (fr) * 1988-06-22 1989-07-13 Ransburg-Gema Gmbh, 6056 Heusenstamm, De
US5083711A (en) * 1989-12-22 1992-01-28 Sames S.A. Electrical insulator device in the form of a section of pipe and installation comprising same
US5255856A (en) * 1990-11-08 1993-10-26 Honda Giken Kogyo Kaubshiki Kiasha Electrostatic spray painting apparatus
US5630552A (en) * 1992-05-15 1997-05-20 Abb Flexible Automation As Paint dosage device for program controlled spray painting system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821006C1 (fr) * 1988-06-22 1989-07-13 Ransburg-Gema Gmbh, 6056 Heusenstamm, De
US5083711A (en) * 1989-12-22 1992-01-28 Sames S.A. Electrical insulator device in the form of a section of pipe and installation comprising same
US5255856A (en) * 1990-11-08 1993-10-26 Honda Giken Kogyo Kaubshiki Kiasha Electrostatic spray painting apparatus
US5630552A (en) * 1992-05-15 1997-05-20 Abb Flexible Automation As Paint dosage device for program controlled spray painting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008007813A1 (fr) * 2006-07-14 2008-01-17 Trinity Industrial Corporation Dispositif de détection de fuite pour matériau de revêtement et système de remplissage de matériau de revêtement
CN101371121B (zh) * 2006-07-14 2011-01-26 得立鼎工业株式会社 涂料检漏设备和涂料充注系统

Also Published As

Publication number Publication date
EP1252936A3 (fr) 2004-09-22
ATE350172T1 (de) 2007-01-15
DE50209123D1 (de) 2007-02-15
DE10115465A1 (de) 2002-10-10
EP1252936B1 (fr) 2007-01-03
ES2278827T3 (es) 2007-08-16

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