CH702021A2 - Apparatus for applying powder coating material. - Google Patents

Apparatus for applying powder coating material. Download PDF

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Publication number
CH702021A2
CH702021A2 CH01540/09A CH15402009A CH702021A2 CH 702021 A2 CH702021 A2 CH 702021A2 CH 01540/09 A CH01540/09 A CH 01540/09A CH 15402009 A CH15402009 A CH 15402009A CH 702021 A2 CH702021 A2 CH 702021A2
Authority
CH
Switzerland
Prior art keywords
powder
air
line
vacuum
injector
Prior art date
Application number
CH01540/09A
Other languages
German (de)
Inventor
Walo Steiger
Original Assignee
Frei Engineering 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 Frei Engineering Ag filed Critical Frei Engineering Ag
Priority to CH01540/09A priority Critical patent/CH702021A2/en
Priority to CH01920/09A priority patent/CH701956A1/en
Publication of CH702021A2 publication Critical patent/CH702021A2/en

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
    • 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
    • B05B12/12—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 conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
    • B05B12/122—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 conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to presence or shape of target
    • 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
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
    • 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
    • B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
    • 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
    • B05B7/1454—Arrangements for supplying particulate material comprising means for supplying collected oversprayed 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/06—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in annular, tubular or hollow conical form
    • 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
    • B05B5/1683—Arrangements for supplying liquids or other fluent material specially adapted for particulate materials

Landscapes

  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

Die Vorrichtung mit einem Injektor (1), durch welchen Pulver (3´) aus einem Fluidbehälter (5) einem Werkstück (19) zugeführt wird, ist als Präzisions-Vakuum-Takter aufgebaut, bei dem durch das Aufheben des Vakuums P u im Vakuumbereich (9) das Ansaugen von Pulver (3) aus dem Fluidbehälter (5) unterbrochen wird.The device with an injector (1), through which powder (3 ') from a fluid container (5) is supplied to a workpiece (19) is constructed as a precision vacuum-Takter, in which by releasing the vacuum P u in the vacuum region (9) the suction of powder (3) from the fluid container (5) is interrupted.

Description

[0001] Gegenstand der Erfindung ist eine Vorrichtung zum Auftragen von Pulverlack gemäss Oberbegriff des Patentanspruchs 1. The invention relates to a device for applying powder coating according to the preamble of patent claim 1.

[0002] Bei der Beschichtung von Werkstücken, wie Fahrzeugteilen, Stahlmöbeln, aber auch bei der Beschichtung von Dosenkörpern, werden Pulverlackpistolen eingesetzt, mit denen aus einem Fluidisierbehälter fluidisiertes Kunststoffpulver aufgetragen wird. Die Förderung des fluidisierten Pulvers erfolgt durch Förderluft, welche in einen Injektor eingeblasen und dort nach dem Prinzip einer Venturidüse angesaugt und durch eine Austragleitung zum Werkstück transportiert wird. Die Haftung am Werkstück erfolgt durch elektrostatische Aufladung des Pulvers und Erdung des Werkstücks. In the coating of workpieces, such as vehicle parts, steel furniture, but also in the coating of can bodies, powder coating guns are used, with which from a fluidizing fluidized plastic powder is applied. The conveying of the fluidized powder takes place by conveying air, which is injected into an injector and sucked in there according to the principle of a Venturi nozzle and transported through a discharge line to the workpiece. The adhesion to the workpiece is achieved by electrostatic charging of the powder and grounding of the workpiece.

[0003] Um den Pulverstrahl im Injektor möglichst rasch unterbrechen zu können, damit kein kostbares Pulver verloren geht und/oder-die Umgebung nicht durch Überschusspulver verunreinigt wird, ist es bekannt, mechanische Schieber einzusetzen, die den Zufluss von Pulver zum Vakuumraum unterbrechen. Solche Schieber haben den Nachteil, dass Restpulver im Injektor und/oder vor dem Schieber zurückbleibt, das bei der Wiederaufnahme des Sprühvorgangs klumpenförmig austritt und die Qualität des Auftrags verschlechtert oder sogar zu Verstopfungen im Injektor führen kann. In order to interrupt the jet of powder in the injector as quickly as possible, so that no precious powder is lost and / or the environment is not contaminated by excess powder, it is known to use mechanical slide, which interrupt the inflow of powder to the vacuum space. Such slides have the disadvantage that residual powder remains in the injector and / or in front of the slide, which emerges lumpy when resuming the spraying process and the quality of the order deteriorates or even lead to blockages in the injector.

[0004] Eine Aufgabe der vorliegenden Erfindung besteht nun darin, eine Vorrichtung zu schaffen, deren Sprühstrahl innerhalb von Millisekunden unterbrechbar ist, ohne dass in der Vorrichtung ein Pulverrückstand aufgebaut wird. An object of the present invention is to provide a device whose spray is interruptible within milliseconds without a powder residue is built up in the device.

[0005] Gelöst wird diese Aufgabe durch eine Vorrichtung gemäss den Merkmalen des Patentanspruchs 1. This object is achieved by a device according to the features of claim 1.

[0006] Vorteilhafte Ausgestaltungen der Vorrichtung sind in den abhängigen Ansprüchen wiedergegeben. Advantageous embodiments of the device are given in the dependent claims.

[0007] Mit der erfindungsgemässen Vorrichtung gelingt es, auf einfache Weise den Pulversprühstrahl innerhalb von Millisekunden zu unterbrechen und anschliessend wieder zu aktivieren, wie dies beispielsweise bei der Innenbeschichtung von Dosenrümpfen vor dem Wechsel zum jeweils nachfolgenden Dosenrumpf notwendig ist. Durch einen sehr schnell, z.B. im Millisekundenbereich unterbrechbaren Sprühstrahl ist es möglich, einerseits den Overspray zu verhindern und andererseits die Werkstücke vollständig, z.B. bis’ an deren Ränder oder bis an eine vorgebbare Grenze mit Pulver zu beschichten. With the inventive device, it is possible to easily interrupt the powder spray within milliseconds and then reactivate again, as is necessary, for example, in the inner coating of can bodies before changing to each subsequent can body. By a very fast, e.g. In the millisecond range interruptible spray, it is possible on the one hand to prevent the overspray and on the other hand, the workpieces completely, for. to coat 'at their edges or to a predeterminable limit with powder.

[0008] Anhand eines illustrierten Ausführungsbeispiels wird die Erfindung näher erläutert. Es zeigt die einzige <tb>Figur<sep>eine schematische Darstellung eines Injektors mit einem Sprühstrahl auf ein bewegtes Werkstück sowie den Zuführungen von Luft und Pulver.Reference to an illustrated embodiment, the invention is explained in detail. It shows the only one <tb> Figure <sep> is a schematic representation of an injector with a spray on a moving workpiece and the supply of air and powder.

[0009] In der einzigen Figur ist mit Bezugszeichen 1 ein Injektor bezeichnet, in welchem fluidisiertes Pulver 3 von einem Fluidbehälter 5 angesaugt wird. Die Aufbereitung im Fluidbehälter 5 erfolgt durch Zufuhr von Luft air/1 in bekannter Weise. Vom Fluidbehälter 5 führt eine Leitung 7 zum Vakuumbereich 9 im Injektor 1. In diesen mündet, in der Figur von der linken Seite, in bekannter Weise eine Förderluftleitung 11, mit der Förderluft air/2 eingeführt wird. Im Injektor 1 ist weiter eine Austragleitung 13 ausgebildet, an deren Ende eine Elektrode 15 zur Aufladung des Pulvers angeordnet ist. Diese Elektrode 15 ist an eine Stromleitung 17 angeschlossen. In the single figure, reference numeral 1 denotes an injector, in which fluidized powder 3 is sucked by a fluid container 5. The treatment in the fluid container 5 is effected by supplying air air / 1 in a known manner. From the fluid container 5, a line 7 leads to the vacuum region 9 in the injector 1. In this opens, in the figure from the left side, in a known manner a conveying air line 11, with the conveying air / air is introduced. In the injector 1, a discharge pipe 13 is further formed, at the end of which an electrode 15 for charging the powder is arranged. This electrode 15 is connected to a power line 17.

[0010] Im Vakuumbereich 9 wird nach dem Venturiprinzip durch das Einblasen von Förderluft air/2, welche zusammen mit aus dem Fluidbehälter 5 angesaugtem Pulver 3 durch die Austragleitung 13 abgeführt wird, Unterdruck Pu erzeugt. Das Ansaugen des fluidisierten Pulvers 3 aus dem Fluidbehälter 5 erfolgt durch den Unterdruck Pu im Vakuumbereich 9. Die ausgetragene Pulvermenge kann durch das Mass des Unterdrucks und damit auch der Förderluft air/2 eingestellt werden. Das ausgetragene Pulver 3 ́ gelangt an ein geerdetes Werkstück 19. In the vacuum region 9 is under the Venturi principle by the injection of air conveying air / 2, which is discharged together with sucked from the fluid container 5 powder 3 through the discharge line 13, negative pressure Pu generated. The suction of the fluidized powder 3 from the fluid container 5 is carried out by the negative pressure Pu in the vacuum region 9. The discharged amount of powder can be adjusted by the measure of the negative pressure and thus also the conveying air air / 2. The discharged powder 3 reaches a grounded workpiece 19.

[0011] Werden Werkstücke am Injektor 1 vorbeigeführt, so besteht das Interesse, die Förderung von Pulver 3 ́ im Zeitraum, in welchem sich kein Werkstück vor dem Injektor 1 befindet (Lücke 21), zu unterbrechen. Erfindungsgemäss wird die Unterbrechung sehr schnell, d.h. innerhalb von Millisekunden nicht wie im Stand der Technik durch einen Schieber 23 (Schieber in gebrochenen Linien dargestellt) durchgeführt, sondern durch einen Luftstoss air/3 durch eine Unterbrechungs-Luftleitung 25 in den Vakuumbereich 9. Vorzugsweise liegt die Unterbrechungs-Luftleitung 25 in Linie gegenüber der Pulverspeiseleitung 7. Die Unterbrechungs-Luftleitung 25 kann selbstverständlich auch an anderer Stelle in den Vakuumbereich 9 einmünden. If workpieces passed on the injector 1, there is the interest, the promotion of powder 3 in the period in which no workpiece is located in front of the injector 1 (gap 21) to interrupt. According to the invention, the interruption is very fast, i. within milliseconds, as in the prior art by a slider 23 (shown broken lines), but by an air surge air / 3 through an interruption air line 25 in the vacuum region 9. Preferably, the interruption air line 25 is in line with Of the powder feed line 7. The interruption air line 25 may of course also open elsewhere in the vacuum region 9.

[0012] Durch den Luftstoss air/3 in den Vakuumbereich 9 wird das Vakuum sofort aufgehoben und damit die Förderung von Pulver aus dem Fluidbehälter 5 sofort unterbrochen. Vorzugsweise ist direkt in der Unterbrechungs-Luftleitung 25 ein Ventil 27 eingesetzt, welches während der gewünschten Zeitspanne die Zufuhr von Luft-in den Vakuumbereich 9 ermöglicht. Die Unterbrechungs-Luft air/3 kann wie die Förderluft air/2 und die Fluidisierluft air/1 aus einem gemeinsamen Druckluft-Netz bezogen werden, wobei die Druckbereiche der Verbraucher individuell geregelt werden können. By the air blast air / 3 in the vacuum region 9, the vacuum is released immediately and thus the promotion of powder from the fluid container 5 is interrupted immediately. Preferably, a valve 27 is used directly in the interruption air line 25, which allows the supply of air into the vacuum region 9 during the desired period of time. The interruption air air / 3, like the conveying air air / 2 and the fluidizing air / 1 can be obtained from a common compressed air network, wherein the pressure ranges of the consumers can be controlled individually.

[0013] Der Schieber 23 kann bei einem Anlagenstopp als Verschlussschieber dienen, um ungewollte Pulveransammlungen im Injektor 1 während dem Unterbruch der Pulverförderung zu verhindern. The slide 23 can serve as a slide in a plant stop to prevent unwanted accumulation of powder in the injector 1 during the interruption of the powder delivery.

Claims (4)

1. Vorrichtung mit einem Injektor (1) zum Auftragen von Pulverlack (3 ́) für die Beschichtung von Werkstücken (19), umfassend eine Förderluftleitung (11), eine Pulverspeiseleitung (7) und eine Austragleitung (13) zum Versprühen des Pulver/Luftgemisches, wobei die drei Leitungen in einen Vakuumbereich (9) münden, in der das nach dem Venturiprinzip aufgebaute Vakuum zum Ansaugen von fluidisiertem Pulver (3) aus einem Fluidisierungsbehälter (5) fungiert, dadurch gekennzeichnet, dass der Vakuumbereich (9) mit einer Unterbrechungs-Luftleitung (25) verbunden ist.1. Device having an injector (1) for applying powder coating (3) for the coating of workpieces (19), comprising a conveying air line (11), a powder feed line (7) and a discharge line (13) for spraying the powder / air mixture in which the three conduits open into a vacuum region (9) in which the venturi-shaped vacuum for sucking fluidized powder (3) from a fluidizing container (5) functions, characterized in that the vacuum region (9) is interrupted by an interruption Air line (25) is connected. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Unterbrechungs-Luftleitung (25) in Linie der Pulverspeiseleitung (7) gegenüberliegend in den Vakuumraum (9) mündet.2. Apparatus according to claim 1, characterized in that the interruption-air line (25) opens in line with the powder feed line (7) opposite in the vacuum space (9). 3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das Vakuum Pu im Vakuumbereich (9) des Injektors (1) durch das Prinzip einer Venturidüse erzeugbar ist.3. Device according to one of claims 1 or 2, characterized in that the vacuum Pu in the vacuum region (9) of the injector (1) can be generated by the principle of a Venturi nozzle. 4. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass in der Unterbrechungs-Luftleitung (25)’ zum Einschalten eines Luftstroms zum’ Vakuumbereich (9) ein schnell schaltbares Ventil (27) eingebaut ist.4. Device according to one of claims 1 to 4, characterized in that in the interruption air line (25) 'for switching on an air flow to the' vacuum region (9), a rapidly switchable valve (27) is installed.
CH01540/09A 2009-10-06 2009-10-06 Apparatus for applying powder coating material. CH702021A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH01540/09A CH702021A2 (en) 2009-10-06 2009-10-06 Apparatus for applying powder coating material.
CH01920/09A CH701956A1 (en) 2009-10-06 2009-12-15 Device for application of powder lacquer for coating e.g. three part canned body, has discharge line that sprays fluidization powder, and vacuum area directly connected with powder in container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01540/09A CH702021A2 (en) 2009-10-06 2009-10-06 Apparatus for applying powder coating material.

Publications (1)

Publication Number Publication Date
CH702021A2 true CH702021A2 (en) 2011-04-15

Family

ID=43857931

Family Applications (2)

Application Number Title Priority Date Filing Date
CH01540/09A CH702021A2 (en) 2009-10-06 2009-10-06 Apparatus for applying powder coating material.
CH01920/09A CH701956A1 (en) 2009-10-06 2009-12-15 Device for application of powder lacquer for coating e.g. three part canned body, has discharge line that sprays fluidization powder, and vacuum area directly connected with powder in container

Family Applications After (1)

Application Number Title Priority Date Filing Date
CH01920/09A CH701956A1 (en) 2009-10-06 2009-12-15 Device for application of powder lacquer for coating e.g. three part canned body, has discharge line that sprays fluidization powder, and vacuum area directly connected with powder in container

Country Status (1)

Country Link
CH (2) CH702021A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114251311B (en) * 2020-09-21 2024-03-22 汕头市潮南区振业实业有限公司 Air pump assembly for anhydrous sodium sulfate dry powder automatic conveying system and control method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323489A (en) * 1964-01-30 1967-06-06 Sylvania Electric Prod Apparatus for coating glass bulbs
GB1111722A (en) * 1965-12-13 1968-05-01 Millard Fillmore Smith Coating process and apparatus
US3995586A (en) * 1976-01-21 1976-12-07 W. R. Grace & Co. Coating apparatus
FR2581324B1 (en) * 1985-05-03 1988-07-15 Porte Michel DEVICE FOR PROVIDING A REGULAR FLOW SPRAY OF POWDERY PRODUCTS OF VERY FINE GRANULOMETRY AND ITS DIFFERENT APPLICATIONS IN PARTICULAR FOR ABRASIVE PRODUCTS
US5186388A (en) * 1991-08-16 1993-02-16 Electrostatic Components, Inc. Production of composite structures using lightweight low cost matrix extender materials
DE19748376A1 (en) * 1997-11-03 1999-05-06 Itw Gema Ag Method and device for powder spray coating
DE19800257C1 (en) * 1998-01-07 1999-02-04 Deutsch Zentr Luft & Raumfahrt Fast switching valve for liquid or gaseous medium
DE102005013091B3 (en) * 2005-03-18 2006-09-14 Eisenmann Maschinenbau Gmbh & Co. Kg Device for conveying powdered fluidized media

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Publication number Publication date
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