EP1445027A1 - Betriebsverfahren für eine Pulverversorgungseinrichtung - Google Patents
Betriebsverfahren für eine Pulverversorgungseinrichtung Download PDFInfo
- Publication number
- EP1445027A1 EP1445027A1 EP04002680A EP04002680A EP1445027A1 EP 1445027 A1 EP1445027 A1 EP 1445027A1 EP 04002680 A EP04002680 A EP 04002680A EP 04002680 A EP04002680 A EP 04002680A EP 1445027 A1 EP1445027 A1 EP 1445027A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- removal chamber
- supply device
- phase
- suction
- 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.)
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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
- 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
- B05B7/144—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means
- B05B7/1445—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means involving vibrations
Definitions
- the invention relates to a powder supply device for a Powder coating system according to the preamble of the claim 1 and an associated operating method according to claim 11.
- the coating powder is removed from the powder container here via one arranged on the underside of the powder container Removal opening at which a funnel is flanged, whereby a vibrator is attached to the wall of the funnel in order to a clumping of the coating powder in the removal opening to prevent the powder container.
- a flap or a pinch valve arranged to the from the Powder container to be able to control emerging powder flow.
- the so-called transmitter which exits the powder container Coating powder in so-called packages to a subordinate Intermediate container sent, the coating powder in the subordinate intermediate container through an air injection is permanently fluidized, so that a powder-air mixture from the intermediate container can be removed.
- a disadvantage of this known powder supply device for a powder coating system is the relatively large technical one Effort, because a flap or a pinch valve to control the Powder removal from the powder container and a transmitter for loading of the intermediate container is required.
- a similar powder supply device is from US 3,714,926 known.
- the invention is therefore based on the object, technically The simplest possible powder supply device for a powder coating system to accomplish.
- the invention encompasses the general technical teaching on a Flap, or a pinch valve to control powder removal from the powder container and on the so-called transmitter for shipping to dispense with the powder removed, thereby to simplify the technical structure of the powder supply device.
- the invention provides that the powder container on its Bottom merges into a removal chamber, the removal chamber a suction opening for suction of the coating powder and an injection port for injecting a fluidizing agent has to that which has entered the removal chamber Loosen coating powder.
- the blowing in of the fluidizing agent is prevented a clumping of the coating powder in the Withdrawal chamber and preferably also in the above the removal chamber located funnel-shaped area of the powder container.
- the fluidizing agent preferably flows on the inner wall the removal chamber upwards and thereby prevents one Deposition of the coating powder on the inner wall of the removal chamber.
- the fluidizing agent is preferably Air blown into the injection opening by a pressure pump becomes.
- the invention is in terms of what to use Fluidizing agent not limited to compressed air or ambient air, but also with other preferably gaseous fluidizing agents realizable.
- the pressure pump for blowing in the fluidizing agent is preferred spatially separated from the removal chamber and via a Line connected to the injection opening of the extraction chamber. There is a possibility that the pressure pump will remove the extraction chambers several powder supply devices according to the invention centrally supplied with the fluidizing agent.
- the injection opening for the fluidizing agent in the extraction chamber below the suction opening arranged is that the fluidizing agent is substantially perpendicular is blown upwards into the removal chamber.
- the injection opening in the removal chamber is advantageous because the coating powder is due in the removal chamber gravity falls down and thus the entire volume the removal chamber is captured by the fluidizing agent stream becomes.
- the removal chamber preferably has at the injection opening for the fluidizing agent also referred to as a fluid floor Use on that is impermeable to the coating powder and is permeable to the fluidizing agent.
- this insert can consist of a sintered material that at the bottom of the removal chamber above the injection opening for the fluidizing agent is arranged nationwide.
- the removal of the coating powder from the powder container is also in the powder supply device according to the invention preferably facilitated in a conventional manner in that the powder container at the transition of the removal chamber a funnel-shaped Exhibits narrowing.
- a vibrator is provided, which clumps the coating powder at the transition from the powder container to the removal chamber prevented.
- the vibrator is therefore preferably on the funnel-shaped constriction of the powder container arranged to the constriction there a clogging of the constriction by the coating powder to prevent.
- the removal chamber has a cylindrical Cross section on, however, the invention is not on Extraction chambers with a cylindrical cross section limited. Rather, it is theoretically possible that the removal chamber has an angular cross section, in particular a rectangular or square cross section of the removal chamber it is a possibility.
- the cross section of the removal chamber is preferably smaller or equal to the cross section of the funnel-shaped one above Narrowing at their narrowest point. This offers the Advantage that the extraction chamber over its entire cross-section is filled with the coating powder without being in the Form the removal chamber for dead spaces.
- the height of the removal chamber is preferably between 80% and 300% of the width of the removal chamber, with any intermediate values are possible within this parameter range.
- the height of the removal chamber is preferably essential larger than their width. This offers the advantage that the fluidized Condition in the removal chamber even after blowing the fluidizing agent is retained for some time, because the powdered coating agent in the removal chamber only sinks slowly.
- the suction opening for suction of the coating powder preferably in the lower region of the Removal chamber is arranged.
- the suction opening in the lower half, in the lower third or even in lower quarter of the removal chamber is advantageous because the coating agent concentration in the removal chamber increases in the fluidized state downwards.
- the invention also encompasses a new type of operating method for the powder supply device according to the invention.
- the suction phase and the fluidization phase preferably follow in time and preferably overlap in time Not. Between the fluidization phase and the suction phase there is therefore preferably a predetermined waiting time.
- the duration of the fluidization phase is preferably between 30% and 80% of the duration of the suction phase, with any intermediate values are possible within this parameter range. It has proved to be particularly advantageous, however, if the suction phase is about twice as long as the fluidization phase.
- the operating method according to the invention preferably sees before that the coating powder during a given Loosening phase is loosened by the vibrator, the loosening phase preferably the suction phase and / or includes the fluidization phase.
- the duration of the loosening phase is therefore preferably greater than the duration of the Fluidization phase and / or the duration of the suction phase.
- the operating method according to the invention preferably sees before that the steps of loosening the coating powder in the removal chamber, the blowing in of the fluidizing agent in the removal chamber and / or suction of the coating powder be repeated cyclically from the removal chamber.
- the loosening phase, the fluidization phase and / or the suction phase do not preferably extend over one entire cycle, but are each within a cycle interrupted.
- the suction phase preferably before the loosening phase ends again.
- FIG. 1 shows a powder supply device according to the invention 1 for an otherwise conventional powder coating system, for the serial coating of workpieces is used.
- the inventive method for receiving and storing coating powder Powder supply device 1 a conventional one Powder container 2, which is also referred to as a "big bag” is, the powder container 2 suspended in a frame 3 is that rests on a foundation 4.
- the powder container 2 has a funnel-shaped on its underside Narrowing 5, being on the underside of the funnel-shaped Constriction 5 of the powder container 2 by means of a flange 6 a removal funnel 7 is attached.
- the removal funnel 7 also tapers conically a cone angle of approximately 35 degrees, in the wall of the Removal funnel 7, a conventional vibrator 8 is attached, which sticks and clumps during removal operation of the coating powder in the removal funnel 7 prevented.
- the removal funnel 7 goes into a hollow cylindrical one Extraction chamber 9 over.
- the extraction chamber 9 In the outer surface of the removal chamber 9 is in the upper area the extraction chamber 9 has a suction opening through which the coating powder via a suction line 10 from the removal chamber can be suctioned off.
- the suction takes place here by a conventional one, not shown for simplification DDF pump.
- the removal chamber 9 has on the lower end face an injection opening, to which a fluid air line 11 Another pump is connected, which also for simplification is not shown. Via the fluid air line 11 can fluid air through the injection opening into the removal chamber 9th are blown in to that located in the removal chamber 9 Loosen and fluidize coating powder.
- Fig. 2 shows the timing of the vibrator 8, the the suction line 10 connected DDF pump and the to Fluid line 11 connected pump within the scope of the invention Operating method.
- the upper timing diagram shows 2 shows the time course of the in the removal chamber 9th injected fluid airflow during the middle timing diagram shows the operating behavior of the vibrator 8.
- the lower time diagram in FIG. 2 shows the temporal operating behavior the DDF pump connected to the suction line 10.
- the DDF pump and the vibrator are activated 8 switched on, whereas initially no injection of Fluid air takes place in the removal chamber 9.
- the DDF pump sucks coating powder through the suction line 10 from the removal chamber 9, the vibrator 8 a fixation of the removal funnel 7 prevented.
- the pump connected to the fluid air line 11 is then switched on, whereupon fluid air is blown into the removal chamber 9. This blowing in of the fluid air into the removal chamber 9 serves to loosen the coating powder located in the removal chamber 9.
- Powder supply device 1 ' according to the invention is largely correct with that described above and shown in FIG. 1 Embodiment match, so that in the following to avoid of repetitions referred to the above description the same reference numerals for matching components used to distinguish between only one Dash are marked.
- a special feature of this embodiment is the height h of the removal chamber 9 ', which is approximately three times as large is like the diameter of the removal chamber 9 '.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating Apparatus (AREA)
Abstract
Description
- Fig. 1
- eine Seitenansicht einer erfindungsgemäßen Pulverversorgungseinrichtung für eine Pulverbeschichtungsanlage,
- Fig. 2
- ein Zeitdiagramm des erfindungsgemäßen Betriebsverfahrens für die Pulverversorgungseinrichtung gemäß Figur 1, sowie
- Fig. 3
- ein alternatives Ausführungsbeispiel einer erfindungsgemäßen Pulverversorgungseinrichtung.
Claims (16)
- Pulverversorgungseinrichtung (1, 1') für eine Pulverbeschichtungsanlage, mit
einem Pulverbehälter (2, 2') zur Aufnahme eines Beschichtungspulvers,
dadurch gekennzeichnet, dass
der Pulverbehälter (2, 2') an seiner Unterseite in eine Entnahmekammer (9, 9') übergeht, wobei die Entnahmekammer (9, 9') eine Absaugöffnung zur Absaugung des Beschichtungspulvers und eine Einblasöffnung zum Einblasen eines Fluidisierungsmittels aufweist, um das Beschichtungspulver aufzulockern. - Pulverversorgungseinrichtung (1, 1') nach Anspruch 1, dadurch gekennzeichnet, dass die Einblasöffnung unterhalb der Absaugöffnung angeordnet ist.
- Pulverversorgungseinrichtung (1, 1') nach Anspruch 2, dadurch gekennzeichnet, dass die Einblasöffnung so angeordnet ist, dass das Fluidisierungsmittel im wesentlichen senkrecht nach oben in die Entnahmekammer (9, 9') eingeblasen wird.
- Pulverversorgungseinrichtung (1, 1') nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Entnahmekammer (9, 9') an der Einblasöffnung einen Einsatz (12, 12') aufweist, der für das Beschichtungspulver undurchlässig und für das Fluidisierungsmittel durchlässig ist.
- Pulverversorgungseinrichtung (1, 1') nach Anspruch 4, dadurch gekennzeichnet, dass der Einsatz (12, 12') aus einem gesinterten Material besteht.
- Pulverversorgungseinrichtung (1, 1') nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Pulverbehälter (2, 2') am Übergang zu der Entnahmekammer (9, 9') eine trichterförmige Verengung (7, 7') aufweist.
- Pulverversorgungseinrichtung (1, 1') nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zur Auflockerung des Beschichtungspulvers am Übergang von dem Pulverbehälter (2, 2') zu der Entnahmekammer (9, 9') ein Rüttler (8, 8') vorgesehen ist.
- Pulverversorgungseinrichtung (1, 1') nach Anspruch 7, dadurch gekennzeichnet, dass der Rüttler (8, 8') an der trichterförmigen Verengung des Pulverbehälters (2, 2') angeordnet ist.
- Pulverversorgungseinrichtung (1, 1') nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Entnahmekammer (9, 9') einen zylindrischen Querschnitt aufweist.
- Pulverversorgungseinrichtung (1, 1') nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Höhe der Entnahmekammer (9, 9') 80% bis 300% der Breite der Entnahmekammer (9, 9') beträgt.
- Betriebsverfahren für eine Pulverversorgungseinrichtung (1, 1') nach mindestens einem der vorhergehenden Ansprüche, mit den folgenden Schritten:Absaugung des Beschichtungspulvers über die Absaugöffnung aus der Entnahmekammer (9, 9') während einer vorgegebenen AbsaugphaseEinblasen des Fluidisierungsmittels über die Einblasöffnung in die Entnahmekammer (9, 9') während einer vorgegebenen Fluidisierungsphase.
- Betriebsverfahren nach Anspruch 11, dadurch gekennzeichnet, dass die Absaugphase und die Fluidisierungsphase zeitlich aufeinander folgen und einander zeitlich nicht überlappen.
- Betriebsverfahren nach Anspruch 11 und/oder Anspruch 12, dadurch gekennzeichnet, dass die Dauer der Fluidisierungsphase zwischen 30% und 80% der Dauer der Absaugphase beträgt.
- Betriebsverfahren nach mindestens einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass das Beschichtungspulver während einer vorgegebenen Auflockerungsphase durch den Rüttler (8, 8') aufgelockert wird.
- Betriebsverfahren nach Anspruch 14, dadurch gekennzeichnet, dass die Auflockerungsphase die Absaugphase und die Fluidisierungsphase einschliesst.
- Betriebsverfahren nach mindestens einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass die Schritte des Einblasens des Fluidisierungsmittels in die Entnahmekammer (9, 9') und des Absaugens des Beschichtungspulvers aus der Entnahmekammer (9, 9') zyklisch wiederholt werden.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10304892 | 2003-02-06 | ||
| DE2003104892 DE10304892B3 (de) | 2003-02-06 | 2003-02-06 | Betriebsverfahren für eine Pulverversorgungseinrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1445027A1 true EP1445027A1 (de) | 2004-08-11 |
Family
ID=32603183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04002680A Withdrawn EP1445027A1 (de) | 2003-02-06 | 2004-02-06 | Betriebsverfahren für eine Pulverversorgungseinrichtung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1445027A1 (de) |
| DE (1) | DE10304892B3 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006041527A1 (de) * | 2006-09-05 | 2008-03-27 | Dürr Systems GmbH | Pulverförderpumpe und zugehöriges Betriebsverfahren |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH196850A (de) * | 1935-09-06 | 1938-03-31 | Polysius G Ag | Verfahren und Einrichtung zum gleichmässigen Abziehen von mehl- oder griessförmigem Gut aus Vorratsbehältern. |
| FR1435990A (fr) * | 1965-03-05 | 1966-04-22 | Sames Mach Electrostat | Perfectionnements aux dispositifs pneumatiques de distribution de poudre |
| FR1486650A (fr) * | 1966-07-13 | 1967-06-30 | Pomeroy Harcourt Conrad Van Ho | Trémie pour la projection électrostatique de produits pulvérulents |
| US3826540A (en) * | 1973-03-21 | 1974-07-30 | Elektro Ion | Powder hopper for electrostatic powder spraying apparatus |
| US5140935A (en) * | 1990-04-04 | 1992-08-25 | Wagner International Ag | Fluidization arrangement for an electrostatic powder coating device |
| US5654042A (en) * | 1992-12-17 | 1997-08-05 | Nordson Corporation | Powder coating system for difficult to handle powders |
| WO2002085532A1 (en) * | 2001-04-24 | 2002-10-31 | Innovative Technology, Inc. | A apparatus and process for solid-state deposition and consolidation of high velocity powder particles using thermal plastic deformation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3611039C1 (de) * | 1986-04-02 | 1987-08-13 | Wagner Internat Ag | Fluidisiereinrichtung |
| DE4105663A1 (de) * | 1991-02-22 | 1992-09-03 | Metri Airfluid Ag | Einrichtung zum speisen eines elektrostatischen pulverbeschichtungsgeraets mit einem pulver-luft-strom |
| DE10105504A1 (de) * | 2001-02-07 | 2002-08-14 | Eos Electro Optical Syst | Vorrichtung zur Behandlung von Pulver für eine Vorrichtung zum Herstellen eines dreidimensionalen Objekts, Vorrichtung zum Herstellen eines dreidimensionalen Objekts und Verfahren zum Herstellen eines dreidimensionalen Objekts |
-
2003
- 2003-02-06 DE DE2003104892 patent/DE10304892B3/de not_active Expired - Fee Related
-
2004
- 2004-02-06 EP EP04002680A patent/EP1445027A1/de not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH196850A (de) * | 1935-09-06 | 1938-03-31 | Polysius G Ag | Verfahren und Einrichtung zum gleichmässigen Abziehen von mehl- oder griessförmigem Gut aus Vorratsbehältern. |
| FR1435990A (fr) * | 1965-03-05 | 1966-04-22 | Sames Mach Electrostat | Perfectionnements aux dispositifs pneumatiques de distribution de poudre |
| FR1486650A (fr) * | 1966-07-13 | 1967-06-30 | Pomeroy Harcourt Conrad Van Ho | Trémie pour la projection électrostatique de produits pulvérulents |
| US3826540A (en) * | 1973-03-21 | 1974-07-30 | Elektro Ion | Powder hopper for electrostatic powder spraying apparatus |
| US5140935A (en) * | 1990-04-04 | 1992-08-25 | Wagner International Ag | Fluidization arrangement for an electrostatic powder coating device |
| US5654042A (en) * | 1992-12-17 | 1997-08-05 | Nordson Corporation | Powder coating system for difficult to handle powders |
| WO2002085532A1 (en) * | 2001-04-24 | 2002-10-31 | Innovative Technology, Inc. | A apparatus and process for solid-state deposition and consolidation of high velocity powder particles using thermal plastic deformation |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10304892B3 (de) | 2004-08-19 |
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