EP0541492B1 - Application of a pulverizable substance - Google Patents

Application of a pulverizable substance Download PDF

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Publication number
EP0541492B1
EP0541492B1 EP19920810858 EP92810858A EP0541492B1 EP 0541492 B1 EP0541492 B1 EP 0541492B1 EP 19920810858 EP19920810858 EP 19920810858 EP 92810858 A EP92810858 A EP 92810858A EP 0541492 B1 EP0541492 B1 EP 0541492B1
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EP
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Prior art keywords
heating
pressure medium
heating cartridge
gaseous
medium
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EP19920810858
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German (de)
French (fr)
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EP0541492A1 (en
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Ulrich Sigrist
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    • 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
    • B05B7/16—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 incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—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 incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • B05B7/1613—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 incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
    • B05B7/162—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 incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed
    • B05B7/1626—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 incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed at the moment of mixing

Definitions

  • the invention relates to a method and a device for applying a flowable, atomizable substance with at least one spray gun using a gaseous pressure medium heated in the area of the gun by means of a heating cartridge.
  • the finished surface coating no longer contains any solvent components.
  • the spraying is carried out with at least one hand gun and / or with at least one automatic machine gun.
  • atomizing with a heated gaseous pressure medium leads to less moisture absorption and to a lower overspray.
  • Two-component systems can also be sprayed on, the reaction already beginning in the flight phase and ending as a solid-state reaction on the substrate.
  • Air is used, which is the cheapest and can be easily conditioned in compressed air converters. Conditioning is understood to mean, for example, heating to a certain temperature, removal or control of the moisture content and reduction or adjustment to a predetermined pressure.
  • an inert gas in particular nitrogen, can also be used in special cases, but this is always more expensive.
  • DE, A, 841864 comprises a spraying system which describes a spraying device with electrical resistance heating in the nozzle body. This allows the spray material to be kept warm.
  • a spraying system comprises a winding wire for heating the sprayed material and the pressure medium.
  • EP, A1, 01580097 shows the air heating in an attachment on a spray gun.
  • the air is heated in a spiral pipe around a heating element and discharged into the anteroom. Heat is transferred to the gun body via the outer jacket of the attachment, where the spray material is kept warm.
  • the inventor has set himself the task of creating a method and a small-sized device of the type mentioned at the outset which increase the cost-effectiveness, in particular with lower energy consumption and an improved coating quality, while at least the same throughput is achieved.
  • the object is achieved according to the invention in that the pressure medium is preconditioned without heating is, and an outside cold, heated by electrical resistance heating cartridge passes through at least twice in countercurrent, it being preheated for the time being and brought to an adjustable temperature during the last run.
  • the heating of the gaseous pressure medium according to the invention on or in the spray gun with preheating and deflection allows a very small and light heating cartridge and reduces the heat loss to a minimum, which brings a further advantage thanks to the higher application quality, layer thickness and shorter flash-off time achieved with uniformly heated compressed air .
  • the supplied gaseous pressure medium is preferably heated to an adjustable temperature in a sensor-controlled manner, in particular in the range from 30 to 90 ° C., depending on the use of water in the foreground or an organic solvent which is increasingly also being pushed back by legal regulations.
  • an adjustable temperature in a sensor-controlled manner, in particular in the range from 30 to 90 ° C., depending on the use of water in the foreground or an organic solvent which is increasingly also being pushed back by legal regulations.
  • higher temperatures are preferred; for paints, for example, the preferred temperature can be 70 to 80 ° C, for adhesives 50 to 60 ° C.
  • the sensor used is also responsible for ensuring that, with the help of appropriate electronics known per se Only switches on the heating when the pressure of the gaseous pressure medium is at least 0.5 bar. This can prevent unnecessary heating power being wasted when the system is at a standstill.
  • the gaseous pressure medium which, as in the known prior art, is generally air, atomizes the spray material preferably at a pressure of 0.5 to 4 bar.
  • the low pressure range of up to approximately 1 bar is preferred because, thanks to lower impact forces, better application efficiency is achieved due to overspray resulting in lower material losses.
  • the object is achieved according to the invention in that the supply of the gaseous pressure medium has a system for preconditioning without heating and a downstream, replaceable heating cartridge with an outer jacket made of a heat-insulating material and means for deflecting, adapted to the spray gun or integrated into the pistol grip of the pressure medium in a counterflow.
  • Special and further forms of training of the device are the subject of dependent claims.
  • the system for preconditioning can be a pressure reducing valve.
  • the heating cartridge is dimensioned so small that it can be easily adapted to the spray gun or integrated into it, even on / in a manual.
  • the dimensions are also evident from the fact that, according to one variant, the heating cartridge is integrated in the pistol grip. Cartridges that can be adapted to the spray gun are only slightly larger, if at all. Cartridges that are too large would be bulky and bulky.
  • the main characteristics for a heating cartridge are in addition to the dimensions, the amount of air passed per unit of time, the heating power in the cartridge and the insulation capacity.
  • the gaseous pressure medium introduced into the heating cartridge is supplied by a compressor via a pressure reducing valve or via a converter without heating.
  • a pressure bottle can replace a compressor.
  • the method and device are particularly suitable for coating substrates with paints, lacquers and adhesives.
  • the device for applying a flowable, atomizable substance essentially comprises a system 10 for preconditioning a gaseous medium, hereinafter also referred to as air or compressed air in accordance with the most frequently used medium, a spray gun 12 and a heating cartridge 14 for conditioning in relation to the temperature .
  • the heating cartridge 14 is effectively adapted at the point designated 14 'to the spray gun 12, in the present case a hand gun.
  • the system 10 for preconditioning air, always without heating comprises a mains adapter 16 for supply from the mains 17, for example 220 V AC.
  • the mains current is converted into direct current of low voltage, for example 24 V DC, and is supplied via a fitting 18 to a low-voltage conductor 20, the heating cable.
  • the heating cartridge can also be heated with mains electricity.
  • Unconditioned compressed air is fed from a compressor 21 via a pressure line 22 and an inlet connection 24 into the system 10 known per se for preconditioning.
  • the preconditioned compressed air is fed into the compressed air line 28 via an outlet connection 26.
  • the heating cartridge 14 is essentially cylindrical, with a baffle in the form of an axial partition 48.
  • the preconditioned compressed air is introduced into the right-hand cylinder half 52 via an inlet fitting 50 and guided downward. There, the compressed air is passed through an opening 54 in the form of a bore or slot / s in the partition 48 into the left-hand cylinder half 56 and is guided upward in the direction of the outlet connection 58.
  • the electrical heating current is conducted via the low voltage conductor 20 and a plug 60 into the heating cartridge 14, where an external spiral heating winding 62 is arranged.
  • This low voltage heater heats the pre-conditioned compressed air in a very efficient way.
  • Preconditioned means that the compressed air is set, for example, in relation to the pressure and the moisture content, but not yet in relation to the temperature.
  • the efficiency of the heating winding 62 is supported by an outer jacket 64 with a high insulation capacity, for example made of a polycarbonate.
  • the flowable, atomizable substance is fed from a material container 68, via a material hose 70, to the spray gun 12.
  • the material, the atomizable substance is, for example, a paint, a varnish or an adhesive.
  • the atomizable substance 74 is atomized with the compressed air via an adjustable spray nozzle 72.
  • a control hose 76 which serves to control the automatic spray gun 12, is indicated by a dashed line.
  • the arrows 78 indicate the direction of flow of the compressed air.
  • the spray gun 12 shown in FIG. 2 for manual operation has an exchangeable heating cartridge 14 which is integrated in the gun handle 80.
  • This pistol grip 80 generally consists of a plastic, and the outer jacket 64 shown in FIG. 1 can therefore also be omitted.
  • the preconditioned compressed air is led via the pressure line 28 into an inlet fitting 50 located below and from there via an inlet opening 82 into the right-hand cylinder half 52.
  • the input opening 82 can in turn consist of at least one bore and / or at least one slot.
  • the compressed air rising in the right-hand cylinder half 52 is guided via an opening 54 in the partition 48 into the left-hand cylinder half 56, where it descends again.
  • the compressed air passes into at least one opening 84, a plurality of openings are distributed over the circumference, into an annular jacket space 86, where the compressed air rises again.
  • this jacket space 86 can be divided in the axial direction or replaced by several ascending pipes.
  • the compressed air which is now fully conditioned, also with respect to the temperature, is guided in the direction of the arrows 78 of the spray nozzle 72, where it sprays the atomizable substance guided out of the material hose 70 via an inlet nozzle 88 into the spray gun 12 .
  • the escape of the spray material 74 is indicated.
  • the spray gun 12 comprises a material regulation 90 for the spray material 74 and a mixing regulator 92 for the atomizing air.
  • a handle 94 can be pulled up to a stop 98 on the pistol grip 80 by actuating a valve rod 96.
  • a temperature sensor 100 is installed in the interior of the heating cartridge 14, consisting of the two cylinder halves 52, 56. This sensor is connected to the system 10 for preconditioning the compressed air and feeds the temperature display 36 (FIG. 1).
  • the device shown in the preceding examples ensures a minimal heating output, a minimal loss of spray material and a direct measurement and control of the parameters.
  • the preconditioned compressed air supplied to the heating cartridge 14 can come directly from a compressor instead of from a system 10 for preconditioning if a pressure reducing valve is installed.
  • FIGS. 1 and 2 a separate heating cartridge 14 is shown, which corresponds in principle to that of FIGS. 1 and 2.
  • the spiral heating coil 62 (FIGS. 1, 2) made of wire or tape is here through on the partition 48, therefore also called heating element, fixed or replaced heating elements 102, for example made of an aluminum body.
  • the heating winding 62 (FIGS. 1, 2) and the heating elements 102 can thus be installed individually or in cooperation with the heating cartridge 14. The current is fed in via the connector 60 in the connecting flange 104 of the heating cartridge 14.
  • the pressure medium enters the right cylinder half 52 of the heating cartridge 14 via the inlet fitting 50, is efficiently heated there in descending fashion, passes through the opening 48 in the partition 54 into the left cylinder half 56 and continues to heat up as it rises.
  • the heated pressure medium flows through the upper flange 106 and the outlet connection 58 directly into a spray gun or into a short special hose to a spray gun.
  • the heating cartridge 14 shown in FIGS. 5, 6 shows an outer jacket 64 made of a polycarbonate with an inner glass or ceramic tube 108 which prevents direct contact of the inner glass or ceramic tubes 110 equipped with a spiral heating coil 62 in the interior 56 with the outer jacket .
  • the pressure medium, the air is introduced from above, flows down between the inner tubes 110 protruding from the bottom of the flange and the casing tube 108, is already deflected there preheated and rises in the inner tubes 110 as it heats up to the predetermined final temperature.
  • All embodiments of the device can also be made explosion-proof in a manner known per se.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Auftragen einer fliessfähigen, zerstäubbaren Substanz mit wenigstens einer Spritzpistole unter Anwendung eines gasförmigen, im Bereich der Pistole mittels einer Heizpatrone erwärmten Druckmediums.The invention relates to a method and a device for applying a flowable, atomizable substance with at least one spray gun using a gaseous pressure medium heated in the area of the gun by means of a heating cartridge.

Im Hinblick auf eine wirtschaftliche, qualitativ hochwertige Oberflächenbeschichtung wird seit einiger Zeit die Zerstäubung von schichtbildenden Substanzen angewendet. Generell wird zwischen zwei Spritztechniken unterschieden:

  • Hochviskose, also zähflüssige Substanzen werden unter hohem Druck, beispielsweise 400 bis 500 bar, zerstäubt, auch ohne Lösungsmittel. Im Bereich der Sprühdüse wird die hochviskose Substanz vom hohen Druck zerrissen, die feinen Partikel werden mit grossem Aufpralldruck gegen das Substrat geschleudert. Wegen des insgesamt sehr hohen Drucks führt dies zu einem Materialverlust. Weiter ist die Oberfläche rauh und porös ausgebildet, von homogenen, dichten Schichten kann hier nicht gesprochen werden.
  • Nach einer zweiten, hier weit mehr interessierenden Methode wird eine zerstäubbare, niedrigerviskose Substanz in einem Lösungsmittel gelöst und wenigstens einer Spritzpistole zugeführt. Dort wird - im Gegensatz zum obenstehenden Beispiel - bei einem verhältnismässig niedrigen Druck von höchstens einigen bar zerstäubt. Dabei entsteht ein Sprühnebel, die Partikel trocknen schon teilweise im Flug. Die zerstäubbare Substanz, das Spritzgut, kommt noch wenigstens teilweise feucht auf der Substratfläche an.Damit können Oberflächenfehler ausgeglichen werden, bei noch feuchtem Spritzgut werden Inhomogenitäten in der Oberfläche, wie Unebenheiten oder Porositäten, ausgeglichen. Andrerseits sollte jedoch das Lösungsmittel rasch verdampfen, damit auf dem Substrat kein eigentliches Fliessen mehr stattfinden kann.
With regard to an economical, high-quality surface coating, the atomization of layer-forming substances has been used for some time. A distinction is generally made between two spraying techniques:
  • Highly viscous, i.e. viscous substances are atomized under high pressure, for example 400 to 500 bar, even without solvents. In the area of the spray nozzle, the highly viscous substance is torn apart by the high pressure, the fine particles are thrown against the substrate with great impact pressure. Because of the overall very high pressure, this leads to a loss of material. Furthermore, the surface is rough and porous, and one cannot speak of homogeneous, dense layers here.
  • According to a second method, which is much more interesting here, an atomizable, low-viscosity substance is dissolved in a solvent and fed to at least one spray gun. Contrary to the example above, atomization is carried out there at a relatively low pressure of at most a few bar. This creates a spray mist, and the particles partially dry in flight. The atomizable substance, the material to be sprayed, arrives at least partially moist on the substrate surface, so that surface defects can be compensated for, while the material to be sprayed is moist, inhomogeneities in the surface, such as unevenness or porosity, are compensated for. On the other hand, however, the solvent should evaporate quickly so that none on the substrate actual flow can take place more.

Die fertige Oberflächenbeschichtung enthält keine Lösungsmittelbestandteile mehr.The finished surface coating no longer contains any solvent components.

Das Aufspritzen erfolgt mit wenigstens einer Handpistole und/oder mit wenigstens einer maschinellen Automatik-Pistole.The spraying is carried out with at least one hand gun and / or with at least one automatic machine gun.

In jüngster Zeit wird dem Umweltschutz und der Arbeitsplatzhygiene eine wesentlich höhere Bedeutung beigemessen. Zahlreiche organische Lösungsmittel können bei mangelnder Sorgfalt und/oder ungenügenden technischen Einrichtungen schädigend auf den Menschen und die Natur einwirken. Die technologische Weiterentwicklung läuft deshalb in Richtung Dispersionen, welche anstelle von organischen Lösungsmitteln Wasser verwenden.Da jedoch Wasser wesentlich langsamer verdampft als übliche organische Lösungsmittel, wird das gasförmige Druckmedium, insbesondere Luft, erwärmt zugeführt. Das dadurch erwärmte Wasser der aufgetragenen Dispersionen verdampft schneller und kann der Verdampfungscharakteristik von organischen Lösungsmitteln angeglichen werden. Es ist keine Aenderung des Arbeitstaktes von bereits installierten Spritzanlagen notwendig. Selbstverständlich kann auch bei zerstäubbaren Substanzen mit organischen Lösungsmitteln warme Zerstäuberluft zugeführt werden.In recent times, environmental protection and workplace hygiene have become much more important. A lack of care and / or inadequate technical facilities can cause numerous organic solvents to have a detrimental effect on people and nature. Technological developments are therefore moving towards dispersions that use water instead of organic solvents. However, since water evaporates much more slowly than conventional organic solvents, the gaseous pressure medium, especially air, is supplied heated. The water that is heated up in the applied dispersions evaporates faster and can be adapted to the evaporation characteristics of organic solvents. It is not necessary to change the cycle of spraying systems that are already installed. Of course, warm atomizing air can also be supplied with organic solvents for atomizable substances.

Neben einer Verbesserung des Auftragungswirkungsgrades führt das Zerstäuben mit einem erwärmten gasförmigen Druckmedium zu einer geringeren Feuchtigkeitsabsorption und zu einem geringeren Overspray.In addition to improving the application efficiency, atomizing with a heated gaseous pressure medium leads to less moisture absorption and to a lower overspray.

Auch Zweikomponentensysteme können aufgespritzt werden, wobei die Reaktion bereits in der Flugphase beginnen und als Festkörperreaktion auf dem Substrat enden kann.Two-component systems can also be sprayed on, the reaction already beginning in the flight phase and ending as a solid-state reaction on the substrate.

Als gasförmiges Druckmedium wird in den häufigsten Fällen Luft verwendet, welche am billigsten ist und in Druckluftwandlern einfach konditionierbar ist. Unter Konditionieren wird beispielsweise das Erwärmen auf eine bestimmte Temperatur, der Entzug bzw. die Regelung des Feuchtigkeitgehalts und die Reduktion bzw. die Einstellung auf einen vorbestimmten Druck verstanden.In most cases it is used as a gaseous pressure medium Air is used, which is the cheapest and can be easily conditioned in compressed air converters. Conditioning is understood to mean, for example, heating to a certain temperature, removal or control of the moisture content and reduction or adjustment to a predetermined pressure.

Falls Luft mit der zerstäubbaren Substanz reagieren würde, kann in speziellen Fällen auch ein inertes Gas, insbesondere Stickstoff, eingesetzt werden, was jedoch immer teurer ist.If air would react with the atomizable substance, an inert gas, in particular nitrogen, can also be used in special cases, but this is always more expensive.

Die DE,A, 841864 umfasst eine Spritzanlage, welche eine Spritzvorrichtung mit elektrischer Widerstandsheizung im Düsenkörper beschreibt. Dadurch kann das Spritzgut warmgehalten werden. Nach der GB,A, 161738 umfasst eine Spritzanlage einen Wickeldraht zum Heizen des Spritzgutes und des Druckmediums. Diese alten bis sehr alten Anlagen genügen den heutigen Anforderungen in keiner Weise.DE, A, 841864 comprises a spraying system which describes a spraying device with electrical resistance heating in the nozzle body. This allows the spray material to be kept warm. According to GB, A, 161738, a spraying system comprises a winding wire for heating the sprayed material and the pressure medium. These old to very old systems do not meet today's requirements in any way.

Die EP,A1, 01580097 zeigt die Lufterwärmung in einem Aufsatz auf einer Spritzpistole. Die Luft wird in einem spiralförmig um ein Heizelement geführten Rohr erwärmt, und in den Düsenvorraum abgeleitet. Ueber den Aussenmantel des Aufsatzes wird Wärme auf den Pistolenkörper übertragen, wo das Spritzgut warmgehalten wird. Diese Spritzpistolen sind in einem allfälligen Handbetrieb unhandlich und in jedem Fall kompliziert.EP, A1, 01580097 shows the air heating in an attachment on a spray gun. The air is heated in a spiral pipe around a heating element and discharged into the anteroom. Heat is transferred to the gun body via the outer jacket of the attachment, where the spray material is kept warm. These spray guns are bulky in any manual operation and are complicated in any case.

Der Erfinder hat sich die Aufgabe gestellt, ein Verfahren und eine kleindimensionierte Vorrichtung der eingangs genannten Art zu schaffen, welche die Wirtschaftlichkeit erhöhen, indem insbesondere bei wenigstens gleichbleibendem Durchsatz ein geringerer Engergieverbrauch und eine verbesserte Qualität der Beschichtung erreicht wird.The inventor has set himself the task of creating a method and a small-sized device of the type mentioned at the outset which increase the cost-effectiveness, in particular with lower energy consumption and an improved coating quality, while at least the same throughput is achieved.

In bezug auf das Verfahren wird die Aufgabe erfindungsgemäss dadurch gelöst, dass das Druckmedium ohne Erwärmung vorkonditioniert wird, und eine aussen kalte, durch elektrischen Widerstand beheizte Heizpatrone wenigstens zweimal im Gegenstrom durchläuft, wobei es vorerst vorgewärmt und beim letzten Durchlauf auf eine einstellbare Temperatur gebracht wird.With regard to the method, the object is achieved according to the invention in that the pressure medium is preconditioned without heating is, and an outside cold, heated by electrical resistance heating cartridge passes through at least twice in countercurrent, it being preheated for the time being and brought to an adjustable temperature during the last run.

Bei zahlreichen bekannten Systemen zur Erwärmung von Zerstäuberluft sind verhältnismässig lange Leitungen von der meist in einem Druckluft-Wandler angeordneten Wärmequelle bis zur Spritzpistole die Regel. Dabei wird die Luft zu einem beachtlichen Teil wieder abgekühlt. Wirkungsvoll isolierte Schläuche wären jedoch unhandlich und stets einer Beschädigungsgefahr ausgesetzt. Druckluft-Wandler bekannter Bauart, welche die Erwärmung beinhalten, sind am Gebäude oder auf einem fahrbaren Gestell fest montiert und können nicht mit der Spritzpistole bewegt werden.In numerous known systems for heating atomizing air, relatively long lines from the heat source, which is usually arranged in a compressed air converter, to the spray gun are the rule. The air is cooled to a considerable extent. However, effectively insulated hoses would be unwieldy and always exposed to the risk of damage. Compressed air converters of known design, which contain the heating, are permanently mounted on the building or on a mobile frame and cannot be moved with the spray gun.

Die erfindungsgemässe Erwärmung des gasförmigen Druckmediums an oder in der Spritzpistole mit Vorwärmung und Umlenkung erlaubt eine sehr kleine und leichte Heizpatrone und lässt den Wärmeverlust auf ein Minimum sinken, was dank der mit gleichmässig erwärmter Druckluft erreichten höheren Auftragsqualität, Schichtdicke und kürzeren Ablüftzeit einen weiteren Vorteil bringt.The heating of the gaseous pressure medium according to the invention on or in the spray gun with preheating and deflection allows a very small and light heating cartridge and reduces the heat loss to a minimum, which brings a further advantage thanks to the higher application quality, layer thickness and shorter flash-off time achieved with uniformly heated compressed air .

Vorzugsweise wird das zugeführte gasförmige Druckmedium sensorgesteuert auf eine einstellbare Temperatur erwärmt, insbesondere im Bereich von 30 bis 90° C, je nach der Verwendung von im Vordergrund stehendem Wasser oder einem vermehrt auch durch gesetzliche Bestimmung zurückgedrängten organischen Lösungsmittel. Materialabhängig sind höhere Temperaturen bevorzugt, bei Lacken beispielsweise kann die bevorzugte Temperatur bei 70 bis 80° C liegen, bei Klebern bei 50 bis 60° C.The supplied gaseous pressure medium is preferably heated to an adjustable temperature in a sensor-controlled manner, in particular in the range from 30 to 90 ° C., depending on the use of water in the foreground or an organic solvent which is increasingly also being pushed back by legal regulations. Depending on the material, higher temperatures are preferred; for paints, for example, the preferred temperature can be 70 to 80 ° C, for adhesives 50 to 60 ° C.

Weiter ist der eingesetzte Sensor dafür besorgt, dass mit Hilfe einer an sich bekannten, entsprechenden Elektronik die Heizung nur bei einem Druck des gasförmigen Druckmediums von wenigstens 0,5 bar einschaltet. Damit kann vermieden werden, dass bei einem Stillstand der Anlage unnötig Heizstrom verschwendet wird.The sensor used is also responsible for ensuring that, with the help of appropriate electronics known per se Only switches on the heating when the pressure of the gaseous pressure medium is at least 0.5 bar. This can prevent unnecessary heating power being wasted when the system is at a standstill.

Das gasförmige Druckmedium, welches wie beim bekannten Stand der Technik in der Regel Luft ist, zerstäubt das Spritzmaterial bevorzugt mit einem Druck von 0,5 bis 4 bar. Der niedrige Druckbereich bis etwa 1 bar ist bevorzugt, weil dank niedrigeren Aufprallkräften ein besserer Auftragswirkungsgrad infolge eines zu geringeren Materialverlusten führenden Oversprays erreicht wird.The gaseous pressure medium, which, as in the known prior art, is generally air, atomizes the spray material preferably at a pressure of 0.5 to 4 bar. The low pressure range of up to approximately 1 bar is preferred because, thanks to lower impact forces, better application efficiency is achieved due to overspray resulting in lower material losses.

In bezug auf die Vorrichtung wird die Aufgabe erfindungsgemäss dadurch gelöst, dass die Zuleitung des gasförmigen Druckmediums eine Anlage zum Vorkonditionieren ohne Erwärmung und eine nachgeschaltete, an die Spritzpistole adaptierte oder im Pistolengriff integrierte, auswechselbare Heizpatrone mit einem Aussenmantel aus einem wärmeisolierenden Material und Mitteln zum Umlenken des Druckmediums in einen Gegenstrom umfasst. Spezielle und weiterführende Ausbildungsformen der Vorrichtung sind Gegenstand von abhängigen Patentansprüchen.With regard to the device, the object is achieved according to the invention in that the supply of the gaseous pressure medium has a system for preconditioning without heating and a downstream, replaceable heating cartridge with an outer jacket made of a heat-insulating material and means for deflecting, adapted to the spray gun or integrated into the pistol grip of the pressure medium in a counterflow. Special and further forms of training of the device are the subject of dependent claims.

Die Anlage zum Vorkonditionieren kann im einfachsten Fall ein Druckreduzierventil sein.In the simplest case, the system for preconditioning can be a pressure reducing valve.

Die Heizpatrone ist in jedem Fall so klein dimensioniert, dass sie problemlos an die Spritzpistole adaptiert oder in sie integriert werden kann, auch an/in einer manuellen. Die Dimensionen sind auch daraus ersichtlich, dass nach einer Variante die Heizpatrone im Pistolengriff integriert ist. An der Spritzpistole adaptierbare Heizpatronen sind - wenn überhaupt - nur geringfügig grösser ausgebildet. Zu grosse Heizpatronen wären unhandlich und sperrig.In any case, the heating cartridge is dimensioned so small that it can be easily adapted to the spray gun or integrated into it, even on / in a manual. The dimensions are also evident from the fact that, according to one variant, the heating cartridge is integrated in the pistol grip. Cartridges that can be adapted to the spray gun are only slightly larger, if at all. Cartridges that are too large would be bulky and bulky.

Die wesentlichen Charakteristiken für eine Heizpatrone sind neben den Dimensionen die durchgeleitete Luftmenge pro Zeiteinheit, die Heizleistung in der Patrone und das Isolationsvermögen.The main characteristics for a heating cartridge are in addition to the dimensions, the amount of air passed per unit of time, the heating power in the cartridge and the insulation capacity.

Das in die Heizpatrone eingeleitete gasförmige Druckmedium wird von einem Kompressor über ein Druckreduzierventil oder über einen Wandler ohne Erwärmung zugeführt. Selbverständlich kann anstelle eines Kompressors eine Druckflasche treten.The gaseous pressure medium introduced into the heating cartridge is supplied by a compressor via a pressure reducing valve or via a converter without heating. Of course, a pressure bottle can replace a compressor.

Die Vorteile der vorliegenden Erfindung können wie folgt zusammengefasst werden:

  • Mit der Heizpatrone wird ein höherer Durchsatz an gasförmigem Druckmedium erreicht als mit einem üblichen, wesentlich grösser dimensionierten Wandler.
  • Der Engergieverbrauch ist wesentlich, z.B. um einen Faktor 8 bis 10, geringer.
  • Die ökologisch und in bezug auf Arbeitsplatzhygiene unbedenklicheren Dispersionen können ohne Veränderung von Taktzeiten organische Lösungen ersetzen.
  • Die Heizpatrone ist in alle bekannten bestehenden Systeme integrierbar.
The advantages of the present invention can be summarized as follows:
  • A higher throughput of gaseous pressure medium is achieved with the heating cartridge than with a conventional, much larger sized converter.
  • The energy consumption is significant, for example by a factor of 8 to 10, less.
  • The dispersions, which are less harmful to the environment and workplace hygiene, can replace organic solutions without changing cycle times.
  • The heating cartridge can be integrated into all known existing systems.

Verfahren und Vorrichtung eignen sich insbesondere zur Beschichtung von Substraten mit Farben, Lacken und Klebern.The method and device are particularly suitable for coating substrates with paints, lacquers and adhesives.

Die Erfindung wird anhand von in der Zeichnung dargestellten Ausführungsbeispielen, welche auch Gegenstand von abhängigen Patentansprüchen sind, näher erläutert. Es zeigen schematisch:

- Fig.1
eine teilweise aufgeschnittene Ansicht einer Vorrichtung zum Auftragen einer fliessfähigen, zerstäubbaren Substanz,
- Fig. 2
eine teilweise aufgeschnittene Ansicht einer Spritzpistole,
- Fig.3, 4
eine in Längsrichtung aufgeschnittene Heizpatrone, und
- Fig. 5, 6
eine Variante einer in quer- und im Bereich des unteren Flanschs teilweise längsgeschnittenen Heizpatrone(IV-VI).
The invention is explained in more detail with reference to exemplary embodiments shown in the drawing, which are also the subject of dependent claims. They show schematically:
- Fig.1
a partially cutaway view of a device for applying a flowable, atomizable substance,
- Fig. 2
a partially cut-away view of a spray gun,
- Fig. 3, 4
a heating cartridge cut open in the longitudinal direction, and
- Fig. 5, 6
a variant of a heating cartridge (IV-VI) which is partially cut longitudinally in the region of the lower flange.

Die Vorrichtung zum Auftragen einer fliessfähigen, zerstäubbaren Substanz umfasst im wesentlichen eine Anlage 10 zum Vorkonditionieren eines gasförmigen Mediums, im folgenden entsprechend dem am meisten verwendeten Medium auch mit Luft oder Druckluft bezeichnet, eine Spritzpistole 12 und eine Heizpatrone 14 zum Konditionieren in bezug auf die Temperatur. Die Heizpatrone 14 ist effektiv an der mit 14′ bezeichneten Stelle an die Spritzpistole 12, im vorliegenden Fall eine Hand-Pistole, adaptiert.The device for applying a flowable, atomizable substance essentially comprises a system 10 for preconditioning a gaseous medium, hereinafter also referred to as air or compressed air in accordance with the most frequently used medium, a spray gun 12 and a heating cartridge 14 for conditioning in relation to the temperature . The heating cartridge 14 is effectively adapted at the point designated 14 'to the spray gun 12, in the present case a hand gun.

Die Anlage 10 zum Vorkonditionieren von Luft, immer ohne Erwärmen, umfasst einen Netzadapter 16 zur Speisung ab Netz 17, beispielsweise 220 V AC. Der Netzstrom wird in Gleichstrom niedriger Spannung umgewandelt, beispielsweise 24 V DC, und über eine Armatur 18 an einen Niederspannungsleiter 20, das Heizkabel, abgegeben. Nach einer Variante kann die Heizpatrone auch mit Netzstrom beheizt werden.The system 10 for preconditioning air, always without heating, comprises a mains adapter 16 for supply from the mains 17, for example 220 V AC. The mains current is converted into direct current of low voltage, for example 24 V DC, and is supplied via a fitting 18 to a low-voltage conductor 20, the heating cable. According to a variant, the heating cartridge can also be heated with mains electricity.

Unkonditionierte Druckluft wird von einem Kompressor 21 über eine Druckleitung 22 und einen Eingangsstutzen 24 in die an sich bekannte Anlage 10 zum Vorkonditionieren eingespeist. Ueber einen Ausgangsstutzen 26 wird die vorkonditionierte Druckluft in die Druckluftleitung 28 eingespeist.Unconditioned compressed air is fed from a compressor 21 via a pressure line 22 and an inlet connection 24 into the system 10 known per se for preconditioning. The preconditioned compressed air is fed into the compressed air line 28 via an outlet connection 26.

Die Anlage 10 zum Vorkonditionieren der Luft umfasst im weitern folgende Anlageteile:

  • Einen Netzschalter 30, den Hauptschalter, zum Ein- und Ausschalten der Anlage 10
  • Eine Temperatur-Druckanzeige 32, welche das Einschalten der Heizung beim Erreichen eines Druckes von z.B. 0,5 bar zeigt
  • Einen Temperaturregler 34 zur Einstellung der der Druckluft in der Heizpatrone 14 zugeführten Wärme
  • Eine Temperaturanzeige 36 für die in der Heizpatrone 14 gemessene Temperatur
  • Ein Manometer 38 für die Anzeige des Luftdruckes
  • Einen FI-Schalter 40 die Schnellabschaltung bei einem Fehlerstrom
  • Eine Feuchtigkeitsanzeige 42 für die vorkonditionierte Druckluft
  • Einen Feuchtigkeitsregler 44 für die vorkonditionierte Druckluft
  • Einen Druckregler 46 für die konditionierte Druckluft.
The system 10 for preconditioning the air further comprises the following system parts:
  • A power switch 30, the main switch for on and Switch off the system 10
  • A temperature-pressure display 32, which shows that the heating is switched on when a pressure of, for example, 0.5 bar is reached
  • A temperature controller 34 for setting the heat supplied to the compressed air in the heating cartridge 14
  • A temperature display 36 for the temperature measured in the heating cartridge 14
  • A manometer 38 for displaying the air pressure
  • A FI switch 40 for quick shutdown in the event of a fault current
  • A moisture indicator 42 for the preconditioned compressed air
  • A humidity controller 44 for the preconditioned compressed air
  • A pressure regulator 46 for the conditioned compressed air.

Die Heizpatrone 14 ist im wesentlichen zylinderförmig, mit einer Schikane in Form einer axialen Scheidewand 48, ausgebildet. Die vorkonditionierte Druckluft wird über eine Eingangsarmatur 50 in die rechte Zylinderhälfte 52 eingeleitet und nach unten geführt. Dort wird die Druckluft über eine als Bohrung/en oder Schlitz/e ausgebildete Oeffnung 54 in der Scheidewand 48 in die linke Zylinderhälfte 56 geleitet und nach oben, in Richtung des Austrittsstutzens 58 geführt.The heating cartridge 14 is essentially cylindrical, with a baffle in the form of an axial partition 48. The preconditioned compressed air is introduced into the right-hand cylinder half 52 via an inlet fitting 50 and guided downward. There, the compressed air is passed through an opening 54 in the form of a bore or slot / s in the partition 48 into the left-hand cylinder half 56 and is guided upward in the direction of the outlet connection 58.

Der elektrische Heizstrom wird über den Niederspannungsleiter 20 und einen Stecker 60 in die Heizpatrone 14 geleitet, wo eine aussenliegende spiralförmige Heizwicklung 62 angeordnet ist. Diese Niederspannungsheizung erwärmt die vorkonditionierte Druckluft in sehr effizienter Weise. Vorkonditioniert heisst hier, dass die Druckluft beispielsweise in bezug auf den Druck und den Feuchtigkeitsgehalt eingestellt ist, jedoch noch nicht in bezug auf die Temperatur. Die Effizienz der Heizwicklung 62 wird durch einen Aussenmantel 64 mit hohem Isolationsvermögen, beispielsweise aus einem Polycarbonat, unterstützt.The electrical heating current is conducted via the low voltage conductor 20 and a plug 60 into the heating cartridge 14, where an external spiral heating winding 62 is arranged. This low voltage heater heats the pre-conditioned compressed air in a very efficient way. Preconditioned here means that the compressed air is set, for example, in relation to the pressure and the moisture content, but not yet in relation to the temperature. The efficiency of the heating winding 62 is supported by an outer jacket 64 with a high insulation capacity, for example made of a polycarbonate.

Die fliessfähige, zerstäubbare Substanz wird aus einem Materialbehälter 68, über einen Materialschlauch 70, zur Spritzpistole 12 geführt. Beim Material, der zerstäubbaren Substanz, handelt es sich beispielsweise um eine Farbe, einen Lack oder einen Kleber.The flowable, atomizable substance is fed from a material container 68, via a material hose 70, to the spray gun 12. The material, the atomizable substance, is, for example, a paint, a varnish or an adhesive.

Ueber eine einstellbare Sprühdüse 72 wird die zerstäubbare Substanz 74 mit der Druckluft zerstäubt.The atomizable substance 74 is atomized with the compressed air via an adjustable spray nozzle 72.

Mit einer gestrichelten Linie ist ein Steuerschlauch 76 angedeutet, welcher der Steuerung der automatischen Spritzpistole 12 dient.A control hose 76, which serves to control the automatic spray gun 12, is indicated by a dashed line.

Die Pfeile 78 zeigen die Richtung des Durchflusses der Druckluft an.The arrows 78 indicate the direction of flow of the compressed air.

Die in Fig. 2 gezeigte Spritzpistole 12 zum manuellen Betrieb hat eine auswechselbare Heizpatrone 14, welche im Pistolengriff 80 integriert ist. Dieser Pistolengriff 80 besteht in der Regel aus einem Kunststoff, der in Fig. 1 dargestellte Aussenmantel 64 kann deshalb auch entfallen.The spray gun 12 shown in FIG. 2 for manual operation has an exchangeable heating cartridge 14 which is integrated in the gun handle 80. This pistol grip 80 generally consists of a plastic, and the outer jacket 64 shown in FIG. 1 can therefore also be omitted.

Gemäss Fig. 2 wird die vorkonditionierte Druckluft über die Druckleitung 28 in eine untenliegende Eingangsarmatur 50 geführt und von dort über eine Eingangsöffnung 82 in die rechte Zylinderhälfte 52 geleitet. Die Eingangsöffnung 82 kann wiederum aus wenigstens einer Bohrung und/oder wenigstens einem Schlitz bestehen. Die in der rechten Zylinderhälfte 52 aufsteigende Druckluft wird über eine Oeffnung 54 in der Scheidewand 48 in die linke Zylinderhälfte 56 geführt, wo sie wieder absteigt. Ueber wenigstens eine Oeffnung 84, mehrere Oeffnungen verteilen sich über den Umfang, tritt die Druckluft in einen ringförmigen Mantelraum 86 über, wo die Druckluft nochmals aufsteigt. Selbstverständlich kann dieser Mantelraum 86 in axialer Richtung unterteilt oder durch mehrere aufsteigende Rohre ersetzt sein.According to FIG. 2, the preconditioned compressed air is led via the pressure line 28 into an inlet fitting 50 located below and from there via an inlet opening 82 into the right-hand cylinder half 52. The input opening 82 can in turn consist of at least one bore and / or at least one slot. The compressed air rising in the right-hand cylinder half 52 is guided via an opening 54 in the partition 48 into the left-hand cylinder half 56, where it descends again. The compressed air passes into at least one opening 84, a plurality of openings are distributed over the circumference, into an annular jacket space 86, where the compressed air rises again. Of course, this jacket space 86 can be divided in the axial direction or replaced by several ascending pipes.

Nach dem Austritt aus der Heizpatrone 14 wird die nun vollständig, auch in bezug auf die Temperatur, konditionierte Druckluft in Richtung der Pfeile 78 der Sprühdüse 72 geführt, wo sie die aus dem Materialschlauch 70 über einen Eintrittsstutzen 88 in die Spritzpistole 12 geführte zerstäubbare Substanz versprüht. Das Austreten des Spritzguts 74 ist angedeutet.After exiting the heating cartridge 14, the compressed air, which is now fully conditioned, also with respect to the temperature, is guided in the direction of the arrows 78 of the spray nozzle 72, where it sprays the atomizable substance guided out of the material hose 70 via an inlet nozzle 88 into the spray gun 12 . The escape of the spray material 74 is indicated.

Die Spritzpistole 12 umfasst eine Materialregulierung 90 für das Spritzgut 74 und einen Mischregler 92 für die Zerstäuberluft.The spray gun 12 comprises a material regulation 90 for the spray material 74 and a mixing regulator 92 for the atomizing air.

Ein Handgriff 94 kann, unter Betätigung eines Ventilstabs 96, bis zu einem Anschlag 98 am Pistolengriff 80 gezogen werden.A handle 94 can be pulled up to a stop 98 on the pistol grip 80 by actuating a valve rod 96.

In den Innenraum der Heizpatrone 14, bestehend aus den beiden Zylinderhälften 52, 56, ist ein Temperaturfühler 100 eingebaut. Dieser Sensor ist mit der Anlage 10 zum Vorkonditionieren der Druckluft verbunden und speist die Temperaturanzeige 36(Fig.1).A temperature sensor 100 is installed in the interior of the heating cartridge 14, consisting of the two cylinder halves 52, 56. This sensor is connected to the system 10 for preconditioning the compressed air and feeds the temperature display 36 (FIG. 1).

Die in den vorstehenden Beispielen gezeigte Vorrichtung gewährleistet eine minimale Heizleistung, einen minimalen Verlust an Spritzgut sowie eine direkte Messung und Regelung der Parameter.The device shown in the preceding examples ensures a minimal heating output, a minimal loss of spray material and a direct measurement and control of the parameters.

Die der Heizpatrone 14 zugeführte vorkonditionierte Druckluft kann statt von einer Anlage 10 zum Vorkonditionieren direkt von einem Kompressor kommen, wenn ein Druckreduzierventil eingebaut ist.The preconditioned compressed air supplied to the heating cartridge 14 can come directly from a compressor instead of from a system 10 for preconditioning if a pressure reducing valve is installed.

In den Fig. 3, 4 ist eine separate Heizpatrone 14 dargestellt, welche im Prinzip derjenigen von Fig. 1 und 2 entspricht. Die spiralförmige Heizwicklung 62 (Fig. 1, 2) aus Draht oder Band ist hier durch an der Scheidewand 48, deshalb auch Heizträger genannt, befestigte Heizelemente 102, z.B. aus einem Aluminiumkörper, ersetzt oder ergänzt. Die Heizwicklung 62 (Fig. 1, 2) und die Heizelemente 102 können also einzeln oder zusammenwirkend in der Heizpatrone 14 eingebaut sein. Die Stromeinspeisung erfolgt über den Stecker 60 im Anschlussflansch 104 der Heizpatrone 14.3, 4, a separate heating cartridge 14 is shown, which corresponds in principle to that of FIGS. 1 and 2. The spiral heating coil 62 (FIGS. 1, 2) made of wire or tape is here through on the partition 48, therefore also called heating element, fixed or replaced heating elements 102, for example made of an aluminum body. The heating winding 62 (FIGS. 1, 2) and the heating elements 102 can thus be installed individually or in cooperation with the heating cartridge 14. The current is fed in via the connector 60 in the connecting flange 104 of the heating cartridge 14.

Im oberen Flansch 106 tritt das Druckmedium über die Eingangsarmatur 50 in die rechte Zylinderhälfte 52 der Heizpatrone 14 ein, wird dort absteigend effizient erwärmt, tritt durch die Oeffnung 48 in der Scheidewand 54 in die linke Zylinderhälfte 56 über und erwärmt sich beim Aufstieg weiter. Durch den oberen Flansch 106 und den Austrittsstutzen 58 fliesst das erwärmte Druckmedium direkt in eine Spritzpistole oder in einen kurzen Spezialschlauch zu einer Spritzpistole.In the upper flange 106, the pressure medium enters the right cylinder half 52 of the heating cartridge 14 via the inlet fitting 50, is efficiently heated there in descending fashion, passes through the opening 48 in the partition 54 into the left cylinder half 56 and continues to heat up as it rises. The heated pressure medium flows through the upper flange 106 and the outlet connection 58 directly into a spray gun or into a short special hose to a spray gun.

Die in Fig. 5, 6 dargestellte Heizpatrone 14 zeigt einen Aussenmantel 64 aus eineme Polycarbonat mit innen anliegendem Glas- oder Keramikrohr 108, welches einen direkten Kontakt der mit einer spiralförmigen Heizwicklung 62 im Innenraum 56 bestückten inneren Glas- oder Keramikrohre 110 mit dem Aussenmantel verhindert. Das Druckmedium, die Luft, wird von oben eingeleitet, fliesst zwischen den unten im Flansch abstehenden inneren Rohren 110 und dem Mantelrohr 108 nach unten, wird dort bereits vorgewärmt umgelenkt und steigt, sich auf die vorgegebene Endtemperatur erwärmend, in den Innenrohren 110 nach oben.The heating cartridge 14 shown in FIGS. 5, 6 shows an outer jacket 64 made of a polycarbonate with an inner glass or ceramic tube 108 which prevents direct contact of the inner glass or ceramic tubes 110 equipped with a spiral heating coil 62 in the interior 56 with the outer jacket . The pressure medium, the air, is introduced from above, flows down between the inner tubes 110 protruding from the bottom of the flange and the casing tube 108, is already deflected there preheated and rises in the inner tubes 110 as it heats up to the predetermined final temperature.

Alle Ausführungsformen der Vorrichtung können in an sich bekannter Weise auch explosionssicher hergestellt sein.All embodiments of the device can also be made explosion-proof in a manner known per se.

Claims (10)

  1. Process for application of a flowable, atomisable substance (74) with at least one spray gun (12) using a gaseous pressure medium heated in the area of the gun by means of a heating cartridge (14),
    characterised in that
    the pressure medium is preconditioned without heating and flows at least twice in opposing directions through an externally cold heating cartridge (14) heated by electrical resistance, where the said medium is first preheated and on its last passage brought to a specifiable temperature.
  2. Process according to claim 1, characterised in that the gaseous pressure medium is heated to a final temperature in the range from 30° to 90° C, preferably from 50° to 80° C.
  3. Process according to claim 1 or 2, characterised in that the heating (62) is switched on only when the gaseous pressure medium has a pressure of at least 0.5 bar.
  4. Process according to any of claims 1 to 3, characterised in that the gaseous pressure medium, preferably air, atomises the substance (74) with a pressure of 0.5 to 4 bar, preferably 0.5 to 1 bar.
  5. Device for performance of the process according to any of claims 1 to 4 with at least one manual and/or automatic spray gun (12), a supply line (70) for the atomisable substance (74), a supply line (28) for the pressure medium, an adjustable spray nozzle (72) and a heating cartridge (14) mounted on the gun with electrical resistance heating for the pressure medium,
    characterised in that
    the supply line (22, 28, 66) of the gaseous pressure medium comprises a device (10) for preconditioning without heating and a subsequent exchangeable heating cartridge (14), adapted to the spray gun (12) or integrated into the gun handle (80), with an outer casing (64) of heat-insulating material, and means for diverting the pressure medium in opposing flow directions.
  6. Device according to claim 5, characterised in that the heating cartridge (14) has an insulating outer casing (64) of a polycarbonate arranged between two flanges (104, 106).
  7. Device according to claim 5 or 6, characterised in that lying against the inside of the outer casing (64) is arranged a glass or ceramic tube (108).
  8. Device according to any of claims 5 to 7, characterised in that the interior (52, 56) of the heating cartridge (14) has at least one separating wall (48) or at least one free inner tube (110), preferably three to six glass or ceramic tubes, to divert the gaseous medium.
  9. Device according to claim 8, characterised in that the inner tubes (110) each have an internal helically arranged resistance heater (62).
  10. Device according to any of claims 5 to 9, characterised in that the device (10) for preconditioning the gaseous medium has a temperature regulator (34) for the heating cartridge (14), a pressure (64) and/or humidity regulator (44) for preconditioning the gaseous medium, and a temperature sensor (100) is preferably integrated into the heating cartridge (14).
EP19920810858 1991-11-07 1992-11-05 Application of a pulverizable substance Expired - Lifetime EP0541492B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3247/91 1991-11-07
CH3247/91A CH680655A5 (en) 1991-11-07 1991-11-07

Publications (2)

Publication Number Publication Date
EP0541492A1 EP0541492A1 (en) 1993-05-12
EP0541492B1 true EP0541492B1 (en) 1996-01-24

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DE (1) DE59205156D1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2100474C1 (en) * 1996-11-18 1997-12-27 Общество с ограниченной ответственностью "Обнинский центр порошкового напыления" Apparatus for gasodynamically applying coatings of powdered materials

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB161738A (en) * 1920-01-29 1921-04-21 Walter George Richards Improvements in and relating to paint-spraying and the like apparatus
US2267264A (en) * 1940-05-14 1941-12-23 James G Bland Air conduit heater
DE841864C (en) * 1949-10-18 1953-05-21 Julius Krebber Process for the production of coatings from fusible, in particular combustible, non-metallic substances and device for carrying out the process
DE1016613B (en) * 1955-03-30 1957-09-26 Krautzberger & Co Safety device for paint spray guns with an electrically heated ring heater
FR1324779A (en) * 1962-06-12 1963-04-19 Safety device, thermal and pressure regulation and control, for heated paint gun
DE8406368U1 (en) * 1984-03-01 1984-06-28 Otto, Roland, 8752 Kleinostheim NOZZLE ELEMENT
US5452855A (en) * 1989-11-06 1995-09-26 Hughes Aircraft Company High volume/low pressure spray gun

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DE59205156D1 (en) 1996-03-07
CH680655A5 (en) 1992-10-15

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