EP1252936A2 - Zylindereinheit für eine Beschichtungsanlage und Dosierverfahren unter Verwendung dieser Einheit - Google Patents
Zylindereinheit für eine Beschichtungsanlage und Dosierverfahren unter Verwendung dieser Einheit Download PDFInfo
- 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
Links
Images
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)
- Coating Apparatus (AREA)
- Fertilizers (AREA)
Abstract
Description
- Fig. 1
- einen Längsschnitt durch die Zylindereinheit;
- Fig. 2
- eine Schnittansicht des Kolbens, in der innere Spülmittelkanäle des Kolbens gezeigt sind;
- Fig. 3
- eine abgewandelte Ausführungsform; und
- Fig. 4
- eine weitere Ausführungsform der Zylindereinheit.
Claims (17)
- Zylindereinheit für eine Beschichtungsanlage mit einem in dem Zylinder (1) verschiebbaren Kolben (2), der die auf seinen entgegengesetzten Seiten befindlichen Räume (11, 11') des Zylinders (1) voneinander trennt und mit mindestens zwei in Achsrichtung des Zylinders voneinander beabstandeten Lippen (4, 4') dicht an der Innenwand des Zylinders (1) anliegt,
wobei zumindest die dem einen Zylinderraum (11) zugewandte Lippe (4) als Dichtungslippe zur druckfesten Abdichtung gegen ein in diesem Raum (11) befindliches Medium ausgebildet ist
und die Lippen (4, 4') zwischen sich einen zwischen dem Umfang des Kolbens (2, 302, 402) und der Innenwand des Zylinders (1, 301, 401) gebildeten Ringraum (10, 310, 410) für ein zum Spülen oder Reinigen der Innenwand des Zylinders verwendbares Medium begrenzen,
dadurch gekennzeichnet, dass sich in der Zylinderinnenwand Öffnungen (30, 43) befinden, die mit einer Leitungsanordnung für das Spül- oder Reinigungsmedium verbunden sind, und die mit dem Ringraum (310, 410) in Verbindung stehen, wenn sich der Kolben (302, 402) in einer mit den Öffnungen (30, 40, 41) ausgerichteten definierten Position befindet, oder mit dem Ringraum (10) über bewegbare Schläuche (16) verbunden sind, die durch einen der Zylinderräume (11') zu Anschlussöffnungen (14, 15, 12, 13) des Kolbens (2) führen. - Zylindereinheit nach Anspruch 1, dadurch gekennzeichnet, dass sich die Öffnungen (43) in einer der Stirnwände (45) des Zylinders (401) befinden, die einen der Zylinderräume (411) begrenzt, und dass der Kolben (402) in seiner der Stirnwand (45) des Zylinders (401) zugewandten Stirnfläche Anschlussöffnungen (40, 41) enthält, die über innere Kanäle des Kolbens (402) mit dem Ringraum (310, 410) verbunden sind und mit den Öffnungen (43) des Zylinders (401) ausgerichtet sind, wenn sich der Kolben in der definierten Position befindet.
- Zylindereinheit nach Anspruch 2, dadurch gekennzeichnet, dass sich die Öffnungen (43) in der Stirnwand (45) des Zylinders befinden, die den Zylinderraum (411) begrenzen, der das von dem Kolben (402) zu fördernde Beschichtungsmaterial enthält.
- Zylindereinheit nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Öffnungen (40, 41, 43) des Zylinders (401) und des Kolbens (402) Flüssigkeitskupplungen enthalten, die die angeschlossenen Kanäle während der Kolbenbewegungen verschließen und den Flüssigkeitsweg zu dem Ringraum (410) des Kolbens öffnen, wenn der Kolben (402) in seiner definierten Position andockt.
- Zylindereinheit nach Anspruch 1, dadurch gekennzeichnet, dass sich die Öffnungen (30) in der zylindrischen Innenwand des Zylinders (301) befinden und die angeschlossene Leitungsanordnung eine gesteuerte Ventilanordnung (34) enthält.
- Zylindereinheit nach Anspruch 5, dadurch gekennzeichnet, dass gesteuerte Ventile (34) für das Spül- oder Reinigungsmedium in den Öffnungen (30) in der Zylinderwand oder in deren Nähe angeordnet sind.
- Zylindereinheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die beiden Lippen (4') als Dichtungslippe zur druckfesten Abdichtung gegen den ihnen jeweils zugewandten Zylinderraum (11, 11') ausgebildet sind.
- Zylindereinheit nach Anspruch 7, dadurch gekennzeichnet, dass die beiden Lippen (4, 4') in den zueinander entgegengesetzten Richtungen zu dem ersten Zylinderraum (11) bzw. zu dem zweiten Zylinderraum (11') hin abgebogen sind oder in diesen Richtungen abgebogene Endkanten haben.
- Zylindereinheit nach Anspruch 8, dadurch gekennzeichnet, dass die beiden axial abgebogenen Lippen (4, 4') oder Endkanten flächig an der Innenwand des Zylinders (1) anliegen.
- Zylindereinheit nach einem der Ansprüche 1 - 9, dadurch gekennzeichnet, dass in den Raum (11') auf der einen Seite des Kolbens (2) eine Dosierflüssigkeit geleitet wird, mit der auf der anderen Seite befindliches Beschichtungsmaterial aus einem Auslass (8) des Zylinders (1) herausgedrückt wird.
- Zylindereinheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass eine Sensoreinrichtung zur Überwachung des Druckes und/oder mindestens eines sonstigen Merkmals des Spül- oder Reinigungsmediums vorgesehen ist.
- Verfahren zum Dosieren eines Beschichtungsmediums, das einem Applikationsorgan in einer Beschichtungsanlage aus einer Zylindereinheit zugeführt wird, durch deren Zylinder (1) ein mit mindestens zwei axial beabstandeten Lippen (4, 4') an der Zylinderinnenwand anliegender Kolben (2) geschoben wird, um das auf seiner einen Seite befindliche Beschichtungsmaterial aus dem Zylinder (1) herauszudrücken,
dadurch gekennzeichnet, dass ein zum Reinigen der zylindrischen Zylinderinnenwand während der Verschiebung des Kolbens (2) dienendes Spül- oder Reinigungsmedium durch den zwischen dem Umfang des Kolbens (2) und der Innenwand des Zylinders (1) gebildeten, von den beiden Lippen (4, 4') begrenzten Ringraum (10) hindurchgeleitet wird. - Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Kolben (302, 402) in eine definierte Position bewegt wird, in der sein Ringarm (310, 410) mit Öffnungen (30, 43) in der Zylinderwand ausgerichtet ist, und dass dann das Reinigungsmedium zum Spülen des Ringraums (310, 410) durch diesen hindurchgeleitet wird.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass das Spül- oder Reinigungsmedium durch bewegbare Schläuche (16), die durch den Innenraum (11') des Zylinders (1) zu inneren Kanälen (12, 13) des Kolbens (2) führen, in den Ringraum (10) und aus ihm heraus geleitet wird.
- Verfahren nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass zur Funktionsüberwachung der Zylindereinheit der Druck und/oder mindestens ein sonstiges Merkmal der in den Ringraum (10) geleiteten Flüssigkeit gemessen werden.
- Verfahren nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, dass die Flüssigkeit in vorbestimmten, automatisch von einer Programmsteuerung der Beschichtungsanlage gewählten Intervallen durch den Ringraum (10) fließt.
- Verfahren nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, dass die Flüssigkeit während der Kolbenbewegung kontinuierlich durch den Ringraum (10) fließt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10115465A DE10115465A1 (de) | 2001-03-29 | 2001-03-29 | Zylindereinheit für eine Beschichtungsanlage und Dosierverfahren unter Verwendung dieser Einheit |
DE10115465 | 2001-03-29 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1252936A2 true EP1252936A2 (de) | 2002-10-30 |
EP1252936A3 EP1252936A3 (de) | 2004-09-22 |
EP1252936B1 EP1252936B1 (de) | 2007-01-03 |
Family
ID=7679493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02007051A Expired - Lifetime EP1252936B1 (de) | 2001-03-29 | 2002-03-27 | Zylindereinheit für eine Beschichtungsanlage und Dosierverfahren unter Verwendung dieser Einheit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1252936B1 (de) |
AT (1) | ATE350172T1 (de) |
DE (2) | DE10115465A1 (de) |
ES (1) | ES2278827T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008007813A1 (en) * | 2006-07-14 | 2008-01-17 | Trinity Industrial Corporation | Leakage detection device for coating material and coating material filling system |
Families Citing this family (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3821006C1 (de) * | 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 |
-
2001
- 2001-03-29 DE DE10115465A patent/DE10115465A1/de not_active Withdrawn
-
2002
- 2002-03-27 DE DE50209123T patent/DE50209123D1/de not_active Expired - Lifetime
- 2002-03-27 AT AT02007051T patent/ATE350172T1/de not_active IP Right Cessation
- 2002-03-27 EP EP02007051A patent/EP1252936B1/de not_active Expired - Lifetime
- 2002-03-27 ES ES02007051T patent/ES2278827T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3821006C1 (de) * | 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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008007813A1 (en) * | 2006-07-14 | 2008-01-17 | Trinity Industrial Corporation | Leakage detection device for coating material and coating material filling system |
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 |
---|---|
DE50209123D1 (de) | 2007-02-15 |
DE10115465A1 (de) | 2002-10-10 |
ES2278827T3 (es) | 2007-08-16 |
EP1252936A3 (de) | 2004-09-22 |
ATE350172T1 (de) | 2007-01-15 |
EP1252936B1 (de) | 2007-01-03 |
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