DE3217003A1 - Atomising system for powdery spray material - Google Patents

Atomising system for powdery spray material

Info

Publication number
DE3217003A1
DE3217003A1 DE19823217003 DE3217003A DE3217003A1 DE 3217003 A1 DE3217003 A1 DE 3217003A1 DE 19823217003 DE19823217003 DE 19823217003 DE 3217003 A DE3217003 A DE 3217003A DE 3217003 A1 DE3217003 A1 DE 3217003A1
Authority
DE
Germany
Prior art keywords
additional
switch
powder
switching
high voltage
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Withdrawn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
DE19823217003
Other languages
German (de)
Inventor
Gerhard 7990 Friedrichshafen Hestermann
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19823211524 external-priority patent/DE3211524A1/en
Application filed by Individual filed Critical Individual
Priority to DE19823217003 priority Critical patent/DE3217003A1/en
Publication of DE3217003A1 publication Critical patent/DE3217003A1/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Withdrawn legal-status Critical Current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
    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • 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
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
    • 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
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

Atomising system for electrostatic powder coating for atomising fine plastics powder, in which the air stream forwarding the powder particles is fanned out in a known manner to strike an impact body, and which operates with a supplementary air stream, to improve atomisation, which stream emerges from the back side of the impact body turned away from the powder stream and which crosses the powder-air stream. The special feature of the present spray system is that this supplementary air can be temporarily switched off or reduced by 70-90% by a switch directly fitted to the spray gun, and that the applied high voltage is reduced to a substantially lower value simultaneously with the reduction effected by switching off. Switching over effects a better penetration of the powder particles into recesses of the workpiece surface.

Description

Die Zusatzanmeldung betrifft eine sich aus der ErfindungThe additional application relates to one of the invention

des Zerstäubungssystems ergebende Lösung eines an sich seit langem bekannten Problems.the nebulization system resultant solution in itself has long been known problem.

Im praktischen Einsatz mit den verschiedensten Werkstückformen zeigte sich, daß das der ursprünglichen Erfindungen eigene optimale Zerstäubungesystem eine so gute Aufladung bringt, daß die durch die zusätzliche Zerstäubungsluft bewirkte breite Sprühwolke zwar einen ausgezeichneten Auftragswirkunsgrad ergibt, aber räume nur schlecht eindringt.In practical use with the most varied of workpiece shapes it has been shown that the optimal atomization system inherent in the original inventions brings such a good charge that the wide spray cloud caused by the additional atomization air results in an excellent application efficiency, but penetrates poorly.

Um insbesondere mit Handpistolen gezielt auch solche beschichten zu können, erwies es sich als besser, die Zerstäubungsluft während des Besprühens solcher Hohlräume ganz abzuschalten und mit dem dann sich aus der Sprühwolke ergebenden Sprohstrahl in jene einzudringen.In order to also coat such guns in a targeted manner, in particular with hand guns it turned out to be better to use the atomizing air while spraying such Shut down cavities completely and with the result then from the spray cloud Spray to penetrate into those.

Besonders praktisch ist diese Maßnahme, wenn das dazu erforderliche Bedienungsglied an der Pistole beispielsweise als zusätzlicher Sohalter der Ventil angebracht ist, sodaß die Bedienungsperson nicht die Arbeit zu unterbrechen braucht, um die Zerstäubungsluft dort abzustellen bzw. wieder anzustellen.This measure is particularly practical if it is necessary Operating element on the gun, for example, as an additional holder for the valve attached so that the operator does not have to interrupt the work, to turn off the atomizing air there or turn it on again.

Am wirkungsvollsten erwies es sich, diesen Umschalter mit dem Ein- / Aus-Schalter zu kombinieren.It turned out to be the most effective to use this switch with the on / Off switch to combine.

Ublicherweise ist bei Handsprühpistolen ein Ein- / Aus - Schalter in Form eines Abzugsbügels vorgesehen, durch dessen Betätigung die Versorgungs-Hochspannung und der Sprühgutstrom eingeschaltet und durch dessen Loslassen jene wieder abgeschaltet werden. Führt man diesen Abzugsbügel-Schalter zweistufig aus, so kann z.B. die erste Stufe weiterhin für die ürsprüngliche Funktion, die zweite Stufe nach stärkerem Fingerdruck und zusätzlichen Betätigungsweg aber dazu dienen, Zerstäuberluftstrom und Hochspannung so ZU vermindern, daß ein besseres Eindringen in Hohlräume bzw. Faraday'sche Käfige möglich wird Dies führt man zwekmäßigerweise z*B. wie folgt aus Zusätzlich zu dem am Versorgungsgerät vorhandenen Einstellpotentiometer zur Vorwahl der Hochspannung ordnet man ein zweites an, welches durch ein mehrpoliges Wechelerrelsis anstelle des ursprünglichen ein- bzw. ausgeschaltet wird.There is usually an on / off switch on hand spray guns provided in the form of a trigger guard, by actuating the high voltage supply and the spray material flow is switched on and when it is released it is switched off again will. If this trigger guard switch is carried out in two stages, for example the first Level continues for the original function, the second level after a stronger one Finger pressure and additional actuation travel, however, serve to reduce the flow of atomizer air and high voltage to reduce so that a better penetration into cavities or Faraday cages becomes possible. as follows off In addition to the setting potentiometer on the supply unit for A second preselection of the high voltage is arranged, which is done by a multi-pole Wechelerrelsis instead of the original on or off will.

Man kann auf diese Weise die zur Beschichtung von Außenflächen nötige Spannung völlig unabhängig von der zur Beschichtung räumen nötigen Spannung wählen und somit beide Spannungen voneinander unabhängig optimal einstellen.In this way, the voltage required for coating external surfaces can be set completely independently of the voltage required for coating clear the required tension and thus optimally set both tensions independently of one another.

Desgleichen wird durch ein im Versorgungsgerät untergebrachtes zusätzliches Magnetventil, evtl. in Verbindung mit einer Bypass-Drossel, der Zerstäuberluftstrom gedrosselt oder abgestellt.The same is done by an additional Solenoid valve, possibly in connection with a bypass throttle, the atomizer air flow throttled or turned off.

Auf diese Weise bleibt die Handpostole von fast jeglichen zusätzlichen Elementen frei und somit gleichermaßen leicht und handlich.In this way the hand postole is kept from almost any additional Elements free and therefore equally light and handy.

Durch die vorliegende Mehrstufenschaltung lassen sich die bei Auftreten einander widerstrebander physikalischer Bedingungen, wie sie zwischen Außenflächen- uhd Innen-Hohlrau-Beschichtang bestehen, ansonsten nötigen Kompromisse vermeiden bzw. den verschiedenen physikalisohen Bedin6ungen optimal ansupassende Verhältnisse schaffen, ohne daß die Bedienung im geringsten erschwert wird.Due to the present multi-stage circuit, the conflicting physical conditions, such as those between external surface uhd interior hollow coating exist, otherwise avoid compromises or conditions optimally adapting to the various physical conditions create without making operation in the least difficult.

Claims (4)

Zerstäubungssystem für staubförmiges Sprühgut Zusatzansprüche 1) Zerstänbungssystem nach Anspruch 5 der obengenannten Patentanmeldung, dadurch gekennzeichnet, daß die Zerstäuberluft zwecks besseren Eindringens in Hohlräume während des Sprühens derselben duroh Betätigen eines an der Pistole angebrachten zusätzlichen Schalters unter Verwendung üblioher Mittel, wie Magnetventile usw. abgeschaltet und anschließend mittels des gleichen Schalters zur Besprühung der Außenflächen wieder eingeschaltet wird. Atomization system for powdery spray material Additional claims 1) Atomizing system according to claim 5 of the above-mentioned patent application, characterized in that that the atomizing air for the purpose of better penetration into cavities during spraying the same by pressing an additional switch attached to the pistol turned off using usual means such as solenoid valves, etc., and then switched on again using the same switch for spraying the outer surfaces will. 2) Zerstäubungssystem nach Anspruch 7 wider obengenannten Patentanmeldung und Zusatzqnspruch 1, dadurch gekennzeiohnet, daß mittels des gleichen Schalters die Versorgungsspannung durch Umschalten von einem Einstellpotentionmeter auf ein zweites solches während des Sprühens von Hohlräumen zugleich mit dem Abschalten der Zerstäubungsluft auf einen niedrigeren Wert von ca. 20 bis 50 kV abgesenkt und zugleich mit dem Einschalten der Zerstäubungsluft wieder auf den für Außenflächen günstigeren Wert von ca. 2) Atomization system according to claim 7 against the above patent application and additional claim 1, characterized in that by means of the same switch the supply voltage by switching from a setting potentiometer to on second such during the spraying of cavities at the same time as switching off the atomizing air is reduced to a lower value of approx. 20 to 50 kV and at the same time as switching on the atomizing air again on the one for external surfaces cheaper value of approx. 60 bis 90 kV angehoben wird. 60 to 90 kV is increased. 3) Zerstäubungssystem nach Zusatzanspruch 1 und 2, dadurch gekennzeichnet, daß der Zerstäuberluftstrom nicht ganz abgeschaltet sondorn auf ca. 10 bis 30 % des ursprünglichen Wertes vermindert wird. 3) atomization system according to additional claims 1 and 2, characterized in that that the atomizer air flow is not completely switched off probe to approx. 10 to 30% the original value is reduced. 4) Zerstäubungssystem naoh Zusatzanspruch 2 oder 3, dadurch gekennzeichnet, daß der am Sprühgerät, vorzagsweise an Handsprühpisolen angebrachte - zur Einschaltung der Ho¢hspannung und des Pulver-/Luftstromes dienende Schalter, der vorzugsweise als Abzugsbügel ausgebildet ist, als Zweistufenschalter vorgesehen wird, dessen erste Betätigungsstufe die Hochspannung, den Pulver-/ Luftstrom (Sprühgutstrom)und die zusätzliche Zerstäubungsluft einschaltet, während die zweite Betätigungsstufe den Zerstäuberluftstrom absohaltet und durch Umschalten auf ein zweites Hochspannungsvorwählelement - vorzugsweise ein Potentiometer - die Versorgungs-Hochspannung ab senkt.4) atomization system naoh additional claim 2 or 3, characterized in that the spray device, preferably attached to hand spray guns - to switch on the high voltage and the powder / air flow serving switch, which is preferably used as a trigger guard is designed, is provided as a two-stage switch, the first actuation stage of which switches on the high voltage, the powder / air flow (spray material flow) and the additional atomizing air, while the second actuation stage isolates the atomizing air flow and by switching to a second high-voltage preselection element - preferably a potentiometer - the supply High voltage lowers.
DE19823217003 1982-03-29 1982-05-06 Atomising system for powdery spray material Withdrawn DE3217003A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823217003 DE3217003A1 (en) 1982-03-29 1982-05-06 Atomising system for powdery spray material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823211524 DE3211524A1 (en) 1982-03-29 1982-03-29 Atomiser system for powdery material for spraying
DE19823217003 DE3217003A1 (en) 1982-03-29 1982-05-06 Atomising system for powdery spray material

Publications (1)

Publication Number Publication Date
DE3217003A1 true DE3217003A1 (en) 1983-11-10

Family

ID=25800738

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823217003 Withdrawn DE3217003A1 (en) 1982-03-29 1982-05-06 Atomising system for powdery spray material

Country Status (1)

Country Link
DE (1) DE3217003A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013212672A1 (en) * 2013-06-28 2014-12-31 Robert Bosch Gmbh Power tools switching device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013212672A1 (en) * 2013-06-28 2014-12-31 Robert Bosch Gmbh Power tools switching device

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