DE4344701A1 - Powder ejection monitoring method from powder spray system for motor vehicle body - Google Patents

Powder ejection monitoring method from powder spray system for motor vehicle body

Info

Publication number
DE4344701A1
DE4344701A1 DE4344701A DE4344701A DE4344701A1 DE 4344701 A1 DE4344701 A1 DE 4344701A1 DE 4344701 A DE4344701 A DE 4344701A DE 4344701 A DE4344701 A DE 4344701A DE 4344701 A1 DE4344701 A1 DE 4344701A1
Authority
DE
Germany
Prior art keywords
powder
container
weighing
fluidization
level
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Withdrawn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
DE4344701A
Other languages
German (de)
Inventor
Gerhard Steurer
Joachim Dr Eberhard
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.)
Eisenmann Anlagenbau GmbH and Co KG
Original Assignee
Eisenmann Anlagenbau GmbH and Co KG
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 Eisenmann Anlagenbau GmbH and Co KG filed Critical Eisenmann Anlagenbau GmbH and Co KG
Priority to DE4344701A priority Critical patent/DE4344701A1/en
Publication of DE4344701A1 publication Critical patent/DE4344701A1/en
Withdrawn legal-status Critical Current

Links

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
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/081—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to the weight of a reservoir or container for liquid or other fluent material; responsive to level or volume of liquid or other fluent material in a reservoir or container
    • 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
    • B05B7/1472—Powder extracted from a powder container in a direction substantially opposite to gravity by a suction device dipped into the powder

Abstract

The method involves using a process monitoring unit (11), a weighing scales (2) and a fluid level indicator (10). A quantity of ejected powder is acquired as a measure of the sprayed lacquer thickness by weighing the powder reservoir container during fluidising and detecting the powder level. The weighing can be performed continuously. Process parameters such as the level in the container, the fluidising state of the powder, the total powder ejection quantity at the end of a vehicle body coating cycle and the failure of individual spray elements are derived from the data acquired by weighing. The sprayed object, e.g. the vehicle body, is weighed before and after spraying and this measurement data also fed into the process monitoring function.

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf ein Verfahren zur Überwachung des Pulverausstoßes an Pulverspritzanlagen, insbe­ sondere für den Automobilbau sowie eine Anordnung zur Durchführung dieses Verfahrens. The invention relates to the preamble of Claim 1 to a method for monitoring of powder output at powder spraying systems, esp especially for automobile construction as well as an arrangement to carry out this procedure.  

In Pulverbeschichtungsanlagen der Metallindustrie, in denen mit hohen Pulverausstoßmengen (ca. 300 g) gefahren wird, stellen Ausstoßschwankungen von 10% kein Problem dar.In powder coating systems in the metal industry, in those with high powder output (approx. 300 g) is driven, output fluctuations of 10% no problem.

Ebenso ist die Fluidisierung eines herkömmlichen Industriepulvers nicht besonders kritisch zu bewerk­ stelligen (üblicherweise mit Luft).Fluidization is also conventional Industrial powder is not particularly critical digits (usually with air).

Dagegen werden bei der Pulverbeschichtung im Automo­ bilbau hohe Anforderungen bezüglich der Konstanz und der Reproduzierbarkeit des Pulverausstoßes gestellt. In diesem Zusammenhang muß der Fluidisierungszustand des sehr schwierig zu fluidisierenden Pulvers genau überwacht und geregelt werden.In contrast, powder coating in the automobile bilbau high requirements regarding consistency and the reproducibility of the powder output. In this context, the fluidization state of the very difficult powder to be fluidized exactly be monitored and regulated.

Bekannte Meßprinzipien zum Messen des Pulveraus­ stoßes, wie z. B. das
Onoda "Unifeed"-System,
Corioliskraft-Meßsystem,
Kapazitives Meßsystem oder
Laserdurchlicht-Meßsystem
wurden unter o.g. Gesichtspunkten getestet und zeigten sich für die besagte Problemstellung als noch nicht ausgereift; es traten bei einem derartig "Schwierigen" Pulver Nachteile wie Ansinterungen im Meßvolumen, Verstopfungen von Meßöffnungen, nicht ausreichende Meßgenauigkeit sowie ungeeigneter Meßbereich auf.Known measuring principles for measuring the powder discharge, such as. B. that
Onoda "Unifeed" system,
Coriolis force measuring system,
Capacitive measuring system or
Laser transmitted light measuring system
were tested from the above point of view and were not yet fully developed for the problem mentioned; Disadvantages such as sintering in the measuring volume, clogging of measuring openings, inadequate measuring accuracy and unsuitable measuring range occurred with such a "difficult" powder.

Die Aufgabe der vorliegenden Erfindung besteht vor allem darin, ein Verfahren und Anordnung zur Über­ wachung des Pulveraustoßes zu schaffen, das den hohen Anforderungen, die insbesondere an die im Automobil­ bau eingesetzten Pulverbeschichtungsanlagen gestellt werden, gerecht wird.The object of the present invention exists everything in it, a procedure and arrangement for over to monitor the powder output, the high Requirements, particularly those in the automobile used powder coating systems become fair.

Die Aufgabe löst erfindungsgemäß ein Verfahren nach dem Oberbegriff des Patentanspruches 1 durch die aufgeführten kennzeichnenden Merkmale. Weiterbildungen und vorteilhafte Ausführungsvarianten der Erfindung sowie eine Anlage zur Durchführung des Verfahrens sind in den sich anschließenden Patentansprüche 2 bis 7 dargelegt.The object solves a method according to the invention the preamble of claim 1 by the characteristic features listed. Training and advantageous embodiments of the invention and an installation for carrying out the method are in the subsequent claims 2 to 7 outlined.

Die Erfindung wird folgend anhand einer schematisiert in einer Zeichnung dargestellten Anordnung näher erläutert.The invention is schematized in the following arrangement shown in a drawing explained.

Die Zeichnung zeigt eine Anordnung zur Überwachung des Pulverausstoßes an Pulverspritzanlagen, bei der das Pulver aus mindestens einem Vorratsbehälter durch Fluidisierung und mittels einem Injektor 12 den Sprühorganen 16 zugeführt wird. Dabei ist nun erfin­ dungsgemäß der mit einer Luftzufuhr 9 und einem Fluid­ boden 7 ausgestattete Fluidisierbehälter 6 auf einer Waage 2 aufgestellt, die über eine Signalleitung 17 mit einer Prozeßüberwachungseinheit 11 verbunden ist.The drawing shows an arrangement for monitoring the powder output in powder spraying systems, in which the powder is fed from at least one storage container to the spraying elements 16 by fluidization and by means of an injector 12 . It is now inventions according to the invention with an air supply 9 and a fluid base 7 equipped fluidizing tank 6 on a scale 2 , which is connected via a signal line 17 to a process monitoring unit 11 .

Weiterhin ist ebenfalls ein mit der Prozeßüberwachungs­ einheit 11 über eine Signalleitung 18 verbundener Niveaugeber 10 am Fluidisierbehälter 6 zur Erfassung des Pulverniveaus 8 angebracht.Furthermore, a level sensor 10 connected to the process monitoring unit 11 via a signal line 18 is also attached to the fluidizing container 6 for detecting the powder level 8 .

Darüber hinaus ist es vorteilhaft, zwischen der Waage 2 und dem Boden des Fluidisierbehälters 6 ein vorzugs­ weise mit einem Rüttelmotor versehenen Rüttelboden 4 anzuordnen.In addition, it is advantageous to arrange between the scales 2 and the bottom of the fluidizing container 6 , preferably with a vibrating base 4 provided with a vibrating motor.

Besonders günstig ist zudem noch, die Waage 2 mit einer großen Masse zur tiefen Abstimmung (Tiefpaß) zu beschweren, wobei die Masse 3 unter den Fluidisier­ behälter 6 bzw. den Rüttelboden gelegt wird.It is also particularly advantageous to weigh down the scales 2 with a large mass for deep tuning (low pass), the mass 3 being placed under the fluidizing container 6 or the vibrating base.

Durch diese beschriebene Anordnung wird erreicht, daß die Pulverausstoßmenge als Maß für die gespritzte Lackdicke durch Wiegen des Pulvervorratsbehälters während der Fluidisierung sowie durch Erfassung des Pulverniveaus ermittelt wird, dabei ist es von Vorteil, daß kontinuierlich gewogen wird.This arrangement described achieves that the powder output as a measure of the sprayed Paint thickness by weighing the powder storage container  during fluidization as well as by recording the Powder levels is determined, it is advantageous to that is weighed continuously.

Aus den aus dem Wiegen ermittelten Daten werden Prozeß­ größen wieThe data determined from the weighing process sizes like

  • - Füllmenge im Behälter,- filling quantity in the container,
  • - Fluidisierungszustand des Pulvers im Pulver­ behälter durch die gleichzeitige Überwachung des Füllstandes, wobei dieser nach Fluidisierzustand = Pulvermasse/Füllvolumen ermittelt wird,- Fluidization state of the powder in the powder container through simultaneous monitoring the level, this after Fluidization state = powder mass / filling volume is determined
  • - Gesamtpulverausstoß am Ende eines Beschichtungs­ zyklus und- Total powder output at the end of a coating cycle and
  • - Ausfälle von einzelnen Sprühorganen ermittelt.- Failures of individual spray organs determined.

Eine weitere Erhöhung der Genauigkeit der Ergebnisse wird dadurch erreicht, daß der bespritzte Gegenstand, z. B. eine Autokarosse, vor und nach dem Spritzen gewogen wird und auch diese Meßdaten in die Prozeß­ überwachung einfließen.A further increase in the accuracy of the results is achieved in that the splashed object, e.g. B. a car body, before and after spraying  is weighed and this measurement data into the process monitoring.

Die in der Prozeßüberwachungseinheit 11 ausgewerteten Meßdaten werden entsprechend dem Ausstattungsgrad der Spritzanlage als manuelle oder maschinelle Stell-, Steuer- oder Regelgröße eingesetzt.The measured data evaluated in the process monitoring unit 11 are used in accordance with the degree of equipment of the spraying system as a manual or machine control, control or regulating variable.

BezugszeichenlisteReference list

1 Fußboden
2 Waage
3 große Masse
4 Rüttelboden
5 Rüttelmotor
6 Fluidisierbehälter
7 Fluidboden
8 Pulverniveau
9 Luftzufuhr
10 Niveaugeber
11 Prozeßüberwachungseinheit
12 Injektor
13 Förderluft
14 Zusatzluft
15 Schlauch
16 Pistole
17 Signalleitung
18 Signalleitung 1 floor
2 scales
3 large measures
4 vibrating floor
5 vibrating motor
6 fluidising containers
7 fluid floor
8 powder level
9 air supply
10 level sensors
11 process monitoring unit
12 injector
13 conveying air
14 additional air
15 hose
16 pistol
17 signal line
18 signal line

Claims (7)

1. Verfahren zur Überwachung des Pulverausstoßes an Pulverspritzanlagen, insbesondere für den Automobilbau, dadurch gekennzeichnet, daß die Pulverausstoßmenge als Maß für die ge­ spritzte Lackdicke durch Wiegen des Pulvervorrats­ behälters während der Fluidisierung sowie durch Erfassung des Pulverniveaus ermittelt wird.1. A method for monitoring the powder output at powder spraying systems, in particular for automotive construction, characterized in that the powder output quantity is determined as a measure of the sprayed paint thickness by weighing the powder supply container during the fluidization and by detecting the powder level. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß kontinuierlich gewogen wird.2. The method according to claim 1, characterized, that is weighed continuously. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß aus den aus dem Wiegen ermittelten Daten Prozeßgrößen wie
  • - Füllmenge im Behälter,
  • - Fluidisierungszustand des Pulvers im Pulverbehälter durch die gleichzeitige Überwachung des Füllzustandes, bestimmt nach der Gleichung Fluidisierungszustand = Pulvermasse/ Füllvolumen,
  • - Gesamtpulverausstoß am Ende eines Be­ schichtungszyklus (Karosse) und
  • - Ausfälle von einzelnen Sprühorganen ermittelt werden.
3. The method according to claim 1 or 2, characterized in that process variables such as from the data determined from the weighing
  • - filling quantity in the container,
  • - Fluidization status of the powder in the powder container through simultaneous monitoring of the filling status, determined according to the equation fluidization status = powder mass / filling volume,
  • - Total powder output at the end of a coating cycle (body) and
  • - Failures of individual spray organs can be determined.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der bespritzte Gegenstand, z. B. eine Autokarosse, vor und nach dem Spritzen gewogen wird und auch diese Meßdaten in die Prozeßüberwachung einfließen.4. The method according to any one of claims 1 to 3, characterized, that the splashed object, e.g. B. a car body, is weighed before and after spraying and this too Flow of measurement data into the process monitoring. 5. Anordnung zur Überwachung des Pulverausstoßes an Pulverspritzanlagen, insbesondere für den Automo­ bilbau, bei der das Pulver aus mindestens einem Vor­ ratsbehälter durch Fluidisierung und mittels einem Injektor den Sprühorganen zugeführt wird, dadurch gekennzeichnet,
daß der mit einer Luftzufuhr (9) und einem Fluid­ boden (7) ausgestattete Fluidisierbehälter (6) auf einer Waage (2) aufgestellt ist, die über eine Signal­ leitung (17) mit einer Prozeßüberwachungseinheit (11) verbunden ist,
und daß weiterhin ein ebenfalls mit der Prozeßüber­ wachungseinheit (11) über eine Signalleitung (18) verbundener Niveaugeber (10) am Fluidisierbehälter (6) zur Erfassung des Pulverniveaus (8) angebracht ist.5. Arrangement for monitoring the powder output at powder spraying systems, in particular for automobile construction, in which the powder is supplied from at least one storage container by fluidization and by means of an injector to the spray organs, characterized in that
that the with an air supply ( 9 ) and a fluid base ( 7 ) equipped fluidizing container ( 6 ) is placed on a scale ( 2 ) which is connected via a signal line ( 17 ) to a process monitoring unit ( 11 ),
and that a level sensor ( 10 ), also connected to the process monitoring unit ( 11 ) via a signal line ( 18 ), is attached to the fluidizing container ( 6 ) for detecting the powder level ( 8 ). 6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, daß zwischen der Waage (2) und dem Boden des Fluidi­ sierbehälters (6) ein vorzugsweise mit einem Rüttel­ motor versehener Rüttelboden (4) angeordnet ist.6. Arrangement according to claim 5, characterized in that between the scales ( 2 ) and the bottom of the Fluidi sierbehälters ( 6 ), a preferably provided with a vibrating motor vibrating plate ( 4 ) is arranged. 7. Anordnung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Waage (2) mit einer großen Masse (3) zur tiefen Abstimmung (Tiefpaß) beschwert wird, wobei die Masse (3) unter dem Fluidisierbehälter (6) bzw. dem Rüttelboden (4) liegt.7. Arrangement according to claim 5 or 6, characterized in that the balance ( 2 ) with a large mass ( 3 ) for deep tuning (low pass) is weighted, the mass ( 3 ) under the fluidizing tank ( 6 ) or the vibrating plate ( 4 ) lies.
DE4344701A 1993-12-27 1993-12-27 Powder ejection monitoring method from powder spray system for motor vehicle body Withdrawn DE4344701A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4344701A DE4344701A1 (en) 1993-12-27 1993-12-27 Powder ejection monitoring method from powder spray system for motor vehicle body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4344701A DE4344701A1 (en) 1993-12-27 1993-12-27 Powder ejection monitoring method from powder spray system for motor vehicle body

Publications (1)

Publication Number Publication Date
DE4344701A1 true DE4344701A1 (en) 1995-09-14

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Country Link
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1092958A1 (en) * 1999-10-14 2001-04-18 Wagner International Ag Method and device for measuring the quantity of powder or the change of the quantity of powder in a container
WO2002007898A1 (en) * 2000-07-24 2002-01-31 The Lubrizol Corporation Method and apparatus for measuring the transfer efficiency of a coating material
US6374160B1 (en) 1999-03-18 2002-04-16 Rexam Ab Method and device for monitoring fluid consumption
DE10209488A1 (en) * 2002-03-05 2003-10-02 Eisenmann Kg Maschbau Plant for coating objects with powder
EP2218514A1 (en) * 2009-02-09 2010-08-18 J. Wagner AG Coating powder supply device
WO2021028215A1 (en) * 2019-08-14 2021-02-18 Sauer Gmbh Method and device for measuring a powder mass flow for powder cladding

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US3605682A (en) * 1969-06-23 1971-09-20 Loveshaw Corp Coating computer
DE2210827A1 (en) * 1971-03-09 1973-04-05 Jena Druckbehaelterbau Veb DEVICE FOR CONTINUOUS FILL LEVEL INDICATION FOR PRESSURE TANK, IN PARTICULAR COLOR PRESSURE TANK
DE2553031B2 (en) * 1975-11-26 1978-06-15 Alb. Klein Kg, 5241 Niederfischbach Process for the fluidic conveying of bulk material as well as a suitable device
DE3640520A1 (en) * 1986-11-27 1988-06-09 Rovema Gmbh Process for the metering and packaging of pourable materials and packaging machine for carrying out the process
DE3729714A1 (en) * 1987-09-04 1989-03-23 Gema Ransburg Ag Powder treatment unit for coating powders
EP0344393A2 (en) * 1988-05-30 1989-12-06 Carl Schenck Ag Dosing device for the fine dispensing of bulk material
DE3824908A1 (en) * 1988-07-22 1990-02-01 Gema Ransburg Ag METHOD AND DEVICE FOR ELECTROSTATIC SPRAY COATING
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DE4126890A1 (en) * 1991-08-14 1993-02-18 Gema Volstatic Ag Consistency control method for electrostatic spray coating of automobile panels - using group of spray booths to treat all panels simultaneously with powder feed from common reservoir

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6374160B1 (en) 1999-03-18 2002-04-16 Rexam Ab Method and device for monitoring fluid consumption
EP1092958A1 (en) * 1999-10-14 2001-04-18 Wagner International Ag Method and device for measuring the quantity of powder or the change of the quantity of powder in a container
DE19949659A1 (en) * 1999-10-14 2001-05-10 Wagner Internat Ag Altstaetten Method and device for determining a powder quantity or powder quantity change in a container
DE19949659C2 (en) * 1999-10-14 2002-06-13 Wagner Internat Ag Altstaetten Method and device for determining a powder quantity or powder quantity change in a container
US6494645B1 (en) 1999-10-14 2002-12-17 Wagner International Ag Method and device for determining a powder quantity or change in powder quantity in a container
WO2002007898A1 (en) * 2000-07-24 2002-01-31 The Lubrizol Corporation Method and apparatus for measuring the transfer efficiency of a coating material
DE10209488A1 (en) * 2002-03-05 2003-10-02 Eisenmann Kg Maschbau Plant for coating objects with powder
EP2218514A1 (en) * 2009-02-09 2010-08-18 J. Wagner AG Coating powder supply device
US8444351B2 (en) 2009-02-09 2013-05-21 J. Wagner Ag Coating-powder-supply apparatus
US8967429B2 (en) 2009-02-09 2015-03-03 J. Wagner Ag Coating-powder-supply apparatus
WO2021028215A1 (en) * 2019-08-14 2021-02-18 Sauer Gmbh Method and device for measuring a powder mass flow for powder cladding

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