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EP0459096A1 - Fan spray nozzle - Google Patents

Fan spray nozzle Download PDF

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Publication number
EP0459096A1
EP0459096A1 EP91103965A EP91103965A EP0459096A1 EP 0459096 A1 EP0459096 A1 EP 0459096A1 EP 91103965 A EP91103965 A EP 91103965A EP 91103965 A EP91103965 A EP 91103965A EP 0459096 A1 EP0459096 A1 EP 0459096A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
section
dome
center axis
cross
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.)
Granted
Application number
EP91103965A
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German (de)
French (fr)
Other versions
EP0459096B1 (en
Inventor
Markus Ing. Rohner
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.)
Wagner International AG
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Wagner International AG
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Filing date
Publication date
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Publication of EP0459096A1 publication Critical patent/EP0459096A1/en
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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
    • 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
    • B05B1/04—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 flat form, e.g. fan-like, sheet-like
    • B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet

Definitions

  • the invention relates to a flat jet nozzle according to the preamble of claim 1.
  • Such flat jet nozzles have been on the market and in use for many years.
  • the object of the present invention is therefore to design such flat jet nozzles in such a way that abrasion is reduced and the service life is thus increased.
  • the solution to this problem results from the characterizing features of patent claim 1.
  • the invention is based on the finding that the edge angle of the inner longitudinal edges of the nozzle slot of the nozzle determines the rate of wear, in such a way that the wear is less or the slower the larger this edge angle is. Due to the non-rotationally symmetrical design of the inner dome of the nozzle according to the invention, this edge angle can be significantly increased, with the consequence of a considerably increased service life of the nozzle, without the effectiveness of the nozzle being impaired by these measures.
  • the generally known flat jet nozzle designated 10
  • This nozzle slot 12 communicates with the interior of the nozzle supplying the spray medium during the spraying operation, this interior, viewed in the direction from the back to the front toward the nozzle slot 12, consisting of a cylindrical part 13 of large diameter, a part adjoining it and following it front tapering conical part 14, a cylindrical part 15 and an adjoining dome 16, in which the nozzle slot 12 cuts.
  • the dome 16 is rotationally symmetrical to the central central axis M of the nozzle and has the shape of a semicircle.
  • FIGS. 2 and 3 now show a section through the flat jet nozzle according to the invention and only the front area of interest here in a particularly large magnification.
  • the nozzle blank is shown, i.e. the nozzle slot has not yet been formed.
  • the nozzle 20 of FIGS. 2 and 3 has an interior space which is composed of a cylindrical part of large diameter which cannot be seen, a conical part 24, a cylindrical part 25 of small diameter and a part which closes off the cylinder part Cathedral 26 is composed.
  • Conical part 24 and cylindrical part 25 correspond completely to the conical part 14 and the cylinder part 15 of the known nozzle 10 from FIG. 1.
  • the difference from FIG. 1 lies in the dome 26.
  • the dome 26 of FIGS. 2 and 3 is not rotationally symmetrical.
  • the special shape of the cathedral 26 results from the observation of two sections perpendicular to one another.
  • the dome 26 -A s the one of Fig.
  • This pointed arch is composed of two identical part circles 26a and 26b, which start from a point S on the central axis M symmetrically to this axis and open tangentially into the cylinder part 25.
  • the radii R T of the two partial circles 26a, 26b are larger than the radius R H of the semicircle of the section from FIG. 2, the center points of the circle lying on a line indicated by dashed lines in FIG. 3, which is due to the line of contact between the pointed arch dome 26 and the cylinder part 25 goes through.
  • the mentioned intersection or starting point S of the partial circles 26a, 26b on the central axis M is identical to the intersection point also designated S on FIG. 2 of the cathedral semicircle there.
  • dome 2 and 3 merge continuously into one another, so that there is a spatial shape for the dome which has a constant change in curvature everywhere, with the exception of the pointed arch edge in the sectional plane of FIG. 3, but this edge to the cylinder part 25 runs out into a curve. If the dome 26 is viewed in cross sections (sections perpendicular to the central axis M), then starting from the front, they have the shape of a very narrow lens, which becomes increasingly thicker and finally changes into a circle when the cylinder part 25 is reached.
  • a nozzle slot is formed in the blank 20 of FIG. 2, in such a way that the longitudinal axis of the nozzle slot is in the sectional plane of FIG. 2, that is to say perpendicular to the sectional plane of FIG. 3.
  • the edge angle ⁇ has approximately 80 0
  • the edge angle ⁇ is substantially greater than 90 o is an obtuse angle.
  • the edge angle ⁇ in the nozzle 20 is increased to an obtuse angle, there is a substantially reduced abrasion on the edge K, with the consequence of a considerably increased service life of the nozzle.
  • the edge angle on the narrow sides of the nozzle slot approximately corresponds to that of the known nozzle 10, because these narrow sides are extremely short. In any case, long-term tests have shown that the life of the nozzle can at least be doubled by the shape of the dome according to the invention.
  • the cylinder part 15 or 25 has a radius R Z of 0.1 to 1.5 mm, the at least substantially the same radius R H is then to be used for the semicircle of the section from FIG. 2.
  • the radius R T of the two partial circles of the pointed arch dome of the section according to FIG. 3 is, as mentioned, to be chosen larger, preferably in the range between 1.4: 1 and 3.0: 1.
  • the nozzle according to the invention is intended in particular for so-called airless high-pressure spraying the extremely high liquid pressures are used, but can also be used in spraying processes working with lower pressures, for example in the combined compressed air-high pressure process or even in the pure compressed air process. All conventional nozzle materials, in particular sintered metals, such as hard metals, are suitable as materials.
  • the nozzle slot is also shaped in the usual way by grinding in; but it must be ensured that the longitudinal axis of the nozzle slot actually comes to lie in the sectional plane of FIG. 3.

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Abstract

A fan spray nozzle for surface coating, in particular for high-pressure spraying, is provided whose internal dome is not of rotation-symmetrical construction. In one cutting plane in which the nozzle slot also extends, the dome is semicircular-shaped and, on the other hand, ogive-shaped in the plane perpendicular thereto, these two sections merging constantly with one another about the central axis of the nozzle. …<IMAGE>…

Description

Die Erfindung betrifft eine Flachstrahldüse gemäß dem Oberbegriff des Patentanspruchs 1. Derartige Flachstrahldüsen sind seit vielen Jahren auf dem Markt und im Einsatz.The invention relates to a flat jet nozzle according to the preamble of claim 1. Such flat jet nozzles have been on the market and in use for many years.

Insbesondere bei den mit Drücken bis zu 300 bar arbeitenden Hochdruck-Sprühverfahren und beim Sprühen mit feststoffpartikel enthaltenden Flüssigkeiten (Metalllack) ist die Lebensdauer dieser Flachstrahldüsen infolge Abrieb der Schlitzkanten begrenzt, und zwar auch dann, wenn für die Düsen hochwertige Materialien, etwa Sinter-Hartmetalle, verwendet werden.Particularly in the high-pressure spraying process, which works with pressures of up to 300 bar and when spraying with liquids containing solid particles (metal lacquer), the service life of these flat jet nozzles is limited due to abrasion of the slot edges, even if high-quality materials such as sintered hard metals are used for the nozzles , be used.

Aufgabe der vorliegenden Erfindung ist es deshalb, derartige Flachstrahldüsen so zu gestalten, daß der Abrieb vermindert und damit die Lebensdauer erhöht wird. Die Lösung dieser Aufgabe ergibt sich aus den kennzeichnenden Merkmalen des Patentanspruchs 1.The object of the present invention is therefore to design such flat jet nozzles in such a way that abrasion is reduced and the service life is thus increased. The solution to this problem results from the characterizing features of patent claim 1.

Der Erfindung liegt die Erkenntnis zugrunde, daß der Kantenwinkel der inneren Längskanten des Düsenschlitzs der Düse die Abnutzungsgeschwindigkeit bestimmt, und zwar derart, daß die Abnutzung umso geringer ist, bzw. umso langsamer verläuft, je größer dieser Kantenwinkel ist. Durch die nicht-rotationssymmetrische Gestaltung des Innendoms der Düse gemäß der Erfindung kann dieser Kantenwinkel wesentlich vergrößert werden, mit der Folge einer beträchtlich gesteigerten Lebensdauer der Düse, ohne daß durch diese Maßnahmen die Effektivität der Düse beeinträchtigt wird.The invention is based on the finding that the edge angle of the inner longitudinal edges of the nozzle slot of the nozzle determines the rate of wear, in such a way that the wear is less or the slower the larger this edge angle is. Due to the non-rotationally symmetrical design of the inner dome of the nozzle according to the invention, this edge angle can be significantly increased, with the consequence of a considerably increased service life of the nozzle, without the effectiveness of the nozzle being impaired by these measures.

Die Erfindung wird nachfolgend an Hand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
Im vergrößerten Maßstab einen Schnitt senkrecht zum Düsenschlitz durch eine Flachstrahldüse nach dem stand der Technik,
Fig. 2
in noch stärker vergrößertem Maßstab einen Schnitt durch einen Flachstrahldüsen-Rohling nach der Erfindung, wobei der in den Rohling noch einzuschneidende Düsenschlitz in der Schnittebene liegen wird,
Fig. 3
im Maßstab von Fig. 2 einen Schnitt durch den Flachstrahldüsen-Rohling von Fig. 2, jedoch in einer gegenüber Fig. 2 um 90o verdrehten Schnittebene,
Fig. 4
in noch weiter vergrößertem Maßstab einen Schnitt entsprechend Fig. 1 bzw. 3 zur Erläuterung des Unterschieds zwischen der Düse von Fig. 1 und derjenigen nach den Figuren 2 und 3.
The invention is explained in more detail below with reference to the drawing. Show it:
Fig. 1
On an enlarged scale, a section perpendicular to the nozzle slot through a flat jet nozzle according to the prior art,
Fig. 2
on an even larger scale, a section through a flat jet nozzle blank according to the invention, the nozzle slot still to be cut into the blank lying in the cutting plane,
Fig. 3
2 shows a section through the flat jet nozzle blank from FIG. 2, but in a sectional plane rotated by 90 ° with respect to FIG. 2,
Fig. 4
1 and 3 on an even larger scale to explain the difference between the nozzle of FIG. 1 and that of FIGS. 2 and 3.

Die im ganzen mit 10 bezeichnete Flachstrahldüse bekannter Bauart weist an ihrer -in Spritzrichtung gesehen- äußeren Vorderseite eine kuppelartige Gestalt auf, wobei in die Kuppel 11 ein Düsenschlitz 12 eingeformt ist, der sich auf der Zeichnung senkrecht zur Zeichenebene erstreckt. Dieser Düsenschlitz 12 steht mit dem während des Spritzbetriebs das Spritzmedium zuführenden Innenraum der Düse in Verbindung, wobei sich dieser Innenraum, in Richtung von hinten nach vorne zum Düsenschlitz 12 hin gesehen, aus einem zylindrischen Teil 13 großen Durchmessers, einem sich daran anschließenden und sich nach vorne verjüngenden konischen Teil 14, einem zylindrischen Teil 15 und einem sich daran anschließenden Dom 16, in welchen der Düsenschlitz 12 einschneidet. Der Dom 16 ist zur zentralen Mittelachse M der Düse rotationssymmetrisch und hat die Form eines Halbkreises.The generally known flat jet nozzle, designated 10, has a dome-like shape on its outer front side, as seen in the spraying direction, a dome slot 12 being formed in the dome 11 and extending perpendicularly to the drawing plane in the drawing. This nozzle slot 12 communicates with the interior of the nozzle supplying the spray medium during the spraying operation, this interior, viewed in the direction from the back to the front toward the nozzle slot 12, consisting of a cylindrical part 13 of large diameter, a part adjoining it and following it front tapering conical part 14, a cylindrical part 15 and an adjoining dome 16, in which the nozzle slot 12 cuts. The dome 16 is rotationally symmetrical to the central central axis M of the nozzle and has the shape of a semicircle.

Die Figuren 2 und 3 zeigen nun einen Schnitt durch die Flachstrahldüse nach der Erfindung und zwar nur den hier interessierenden vordersten Bereich in besonders starker Vergrößerung. Dabei ist der Düsenrohling dargestellt, d.h. der Düsenschlitz ist noch nicht eingeformt. Wie die Düse 10 von Fig. 1 weist die Düse 20 der Fig. 2 und 3 einen Innenraum auf, der sich aus einem -nicht zu sehendenzylindrischen Teil großen Durchmessers, einem konischen Teil 24,einem zylindrischen Teil 25 kleinen Durchmessers und einem den Zylinderteil abschließenden Dom 26 zusammensetzt. Konischer Teil 24 und zylindrischer Teil 25 entsprechen dabei vollständig dem konischen Teil 14 und dem Zylinderteil 15 der bekannten Düse 10 von Fig. 1. Der Unterschied zur Fig. 1 liegt im Dom 26.Figures 2 and 3 now show a section through the flat jet nozzle according to the invention and only the front area of interest here in a particularly large magnification. The nozzle blank is shown, i.e. the nozzle slot has not yet been formed. Like the nozzle 10 of FIG. 1, the nozzle 20 of FIGS. 2 and 3 has an interior space which is composed of a cylindrical part of large diameter which cannot be seen, a conical part 24, a cylindrical part 25 of small diameter and a part which closes off the cylinder part Cathedral 26 is composed. Conical part 24 and cylindrical part 25 correspond completely to the conical part 14 and the cylinder part 15 of the known nozzle 10 from FIG. 1. The difference from FIG. 1 lies in the dome 26.

Im Gegensatz zum zur Achse M rotationssymmetrischen Dom 16 von Fig. 1 ist der Dom 26 der Fig. 2 und 3 nicht rotationssymmetrisch. Die besondere Gestalt des Doms 26 ergibt sich durch die Betrachtung von zwei zueinander senkrechten Schnitten. In der einen, in Fig. 2 dargestellten Schnittebene weist der Dom 26 -wie derjenige von Fig. 1- die Form eines Halbkreises auf, mit einem Radius RH gleich dem Radius Rz des Zylinderteils 25. In der um 90o verdrehten Schnittebene der Fig. 3 weist der Dom 26 die Form eines Spitzbogens auf. Dieser Spitzbogen setzt sich aus zwei gleichen Teilkreisen 26a und 26b zusammen, die von einem Punkt S auf der Mittelachse M symmetrisch zu dieser Achse ausgehen und tangierend in den Zylinderteil 25 einmünden. Die Radien RT der beiden Teilkreise 26a, 26b sind größer als der Radius RH des Halbkreises des Schnitts von Fig. 2, wobei die Kreismittelpunkte auf einer in Fig. 3 gestrichelt angedeuteten Linie liegen, welche durch die Berührungslinie zwischen Spitzbogendom 26 und Zylinderteil 25 hindurchgeht. Der erwähnte Schnitt- bzw. Ausgangspunkt S der Teilkreise 26a,26b auf der Mittelachse M ist identisch mit dem auf Fig. 2 ebenfalls mit S bezeichneten Schnittpunkt des dortigen Dom-Halbkreises. Die beiden Querschnitte der Fig. 2 und 3 gehen kontinuierlich ineinander über, so daß sich für den Dom eine Raumform ergibt, die überall eine stetige Krümmungsänderung besitzt, mit Ausnahme der Spitzbogenkante in der Schnittebene der Fig. 3, wobei diese Kante jedoch zum Zylinderteil 25 hin in eine Rundung ausläuft. Betrachtet man den Dom 26 in Querschnitten (Schnitten senkrecht zur Mittelachse M ), dann haben diese, von vorne ausgehend, die Form einer sehr schmalen Linse, die immer dicker wird und schließlich bei Erreichen des Zylinderteils 25 in einen Kreis übergeht.In contrast to the dome 16 of FIG. 1, which is rotationally symmetrical to the axis M, the dome 26 of FIGS. 2 and 3 is not rotationally symmetrical. The special shape of the cathedral 26 results from the observation of two sections perpendicular to one another. In the one in Fig. 2 depicted sectional plane 1, the dome 26 -As the one of Fig. The shape of a semicircle on, with a radius R H equal to the radius R for the cylinder part 25 in the 90 o twisted sectional plane of the 3, the dome 26 has the shape of a pointed arch. This pointed arch is composed of two identical part circles 26a and 26b, which start from a point S on the central axis M symmetrically to this axis and open tangentially into the cylinder part 25. The radii R T of the two partial circles 26a, 26b are larger than the radius R H of the semicircle of the section from FIG. 2, the center points of the circle lying on a line indicated by dashed lines in FIG. 3, which is due to the line of contact between the pointed arch dome 26 and the cylinder part 25 goes through. The mentioned intersection or starting point S of the partial circles 26a, 26b on the central axis M is identical to the intersection point also designated S on FIG. 2 of the cathedral semicircle there. The two cross sections of FIGS. 2 and 3 merge continuously into one another, so that there is a spatial shape for the dome which has a constant change in curvature everywhere, with the exception of the pointed arch edge in the sectional plane of FIG. 3, but this edge to the cylinder part 25 runs out into a curve. If the dome 26 is viewed in cross sections (sections perpendicular to the central axis M), then starting from the front, they have the shape of a very narrow lens, which becomes increasingly thicker and finally changes into a circle when the cylinder part 25 is reached.

In den Rohling 20 der Fig. 2,3 wird zur Fertigstellung der Düse ein Düsenschlitz eingeformt, und zwar derart, daß sich die Längsachse des Düsenschlitzes in der Schnittebene der Fig. 2 befindet, also zur Schnittebene der Fig. 3 senkrecht steht.For the completion of the nozzle, a nozzle slot is formed in the blank 20 of FIG. 2, in such a way that the longitudinal axis of the nozzle slot is in the sectional plane of FIG. 2, that is to say perpendicular to the sectional plane of FIG. 3.

An Hand der Fig. 4 soll nun die Auswirkung der besonderen Gestaltung des Doms 26 bei fertiggestellter Düse, also eingeschnittenem Düsenschlitz, erläutert werden, und zwar in Gegenüberstellung zur bekannten Düse 10 von Fig. 1. Dabei ist auf der linken Seite der Mittelachse M die bekannte Düse 10, auf der rechten Seite die erfindungsgemäße Düse 20 dargestellt. Vorauszuschicken ist nun, daß die Kante K, die sich -beidseits- über die gesamte Schlitzlänge erstreckt, die Schlitzbreite definiert und offensichtlich während des Spritzbetriebs dem stärksten Abrieb ausgesetzt ist. Anders ausgedrückt, diese Kante, welche die Durchbruchslinie des Düsenschlitzes durch den Dom darstellt, bestimmt die Lebensdauer der Düse, d.h., diese Kante K nützt sich vergleichsweise schnell ab, mit der Folge, daß die Düse ausgetauscht werden muß, obwohl noch alle anderen Wandbereiche von Schlitz und Dom wenig Abrieb zeigen. Vergleicht man nun die linke und die rechte Seite von Fig. 4, dann zeigt sich, daß bei der Düse 10 mit halbkreisförmigem Dom 16 der Kantenwinkel α in etwa 800 aufweist, wohingegen dieser Kantenwinkel β bei der erfindungsgemäßen Düse 20 mit Spitzbogendom 26 der Kantenwinkel β wesentlich grösser als 90o, also ein stumpfer Winkel ist. Dadurch, daß bei der Düse 20 der Kantenwinkel β zu einem strumpfen Winkel vergrößert ist, ergibt sich an der Kante K ein wesentlich verminderter Abrieb, mit der Folge einer beträchtlich gesteigerten Lebensdauer der Düse. Daß dabei der Kantenwinkel an den Schmalseiten des Düsenschlitzes in etwa demjenigen der bekannten Düse 10 entspricht, spielt dabei keine Rolle, weil diese Schmalseiten extrem kurz sind. Jedenfalls haben Langzeitversuche ergeben, daß die Lebensdauer der Düse durch die erfindungsgemäße Formgebung des Doms zumindest verdoppelt werden kann.The effect of the special design of the dome 26 when the nozzle is finished, that is to say a cut-in nozzle slot, will now be explained with reference to FIG. 4, specifically in comparison to the known nozzle 10 from FIG. 1 Known nozzle 10, the nozzle 20 according to the invention is shown on the right side. It must now be said that the edge K, which extends on both sides over the entire slot length, defines the slot width and is obviously exposed to the greatest abrasion during the spraying operation. In other words, this edge, which represents the breakthrough line of the nozzle slot through the dome, determines the service life of the nozzle, ie this edge K wears out comparatively quickly, with the result that the nozzle has to be replaced, although all other wall areas of Slit and dome show little abrasion. If you now compare the left and the right side of Fig. 4, then it shows that in the nozzle 10 with a semicircular dome 16, the edge angle α has approximately 80 0 , whereas this edge angle β in the nozzle 20 according to the invention with pointed arch dome 26, the edge angle β is substantially greater than 90 o is an obtuse angle. Because the edge angle β in the nozzle 20 is increased to an obtuse angle, there is a substantially reduced abrasion on the edge K, with the consequence of a considerably increased service life of the nozzle. It does not matter that the edge angle on the narrow sides of the nozzle slot approximately corresponds to that of the known nozzle 10, because these narrow sides are extremely short. In any case, long-term tests have shown that the life of the nozzle can at least be doubled by the shape of the dome according to the invention.

Nachdem Flachstrahldüsen in den unterschiedlichsten Größen gefertigt werden, können hier keine allgemein gültigen Maßangaben erfolgen, bzw. sind die nachfolgenden Maßangaben lediglich als bevorzugte Beispiele zu betrachten. Bei den meisten derartigen Düsen weist der Zylinderteil 15 bzw. 25 einen Radius RZ von 0,1 bis 1,5 mm auf, der jeweils zumindest im wesentlichen gleiche Radius RH ist dann für den Halbkreis des Schnitts von Fig. 2 anzusetzen. Der Radius RT der beiden Teilkreise des Spitzbogendoms des Schnitts nach Fig. 3 ist, wie erwähnt, jeweils größer zu wählen, vorzugsweise im Bereich zwischen 1,4:1 und 3,0:1.Since flat jet nozzles are manufactured in a wide variety of sizes, no generally applicable dimensions can be given here, or the following dimensions are only to be regarded as preferred examples. In most of such nozzles, the cylinder part 15 or 25 has a radius R Z of 0.1 to 1.5 mm, the at least substantially the same radius R H is then to be used for the semicircle of the section from FIG. 2. The radius R T of the two partial circles of the pointed arch dome of the section according to FIG. 3 is, as mentioned, to be chosen larger, preferably in the range between 1.4: 1 and 3.0: 1.

Die erfindungsgemäße Düse ist insbesondere für das sogenannte luftlose Hochdruckspritzen bestimmt, bei dem mitextrem hohen Flüssigkeitsdrücken gearbeitet wird, kann aber auch bei mit niedrigeren Drücken arbeitenden Sprühverfahren eingesetzt werden, etwa beim kombinierten Druckluft-Hochdruck-Verfahren bzw. sogar beim reinen Druckluftverfahren. Als Materialien eignen sich alle üblichen Düsenmaterialien, insbesondere Sintermetalle, wie etwa Hartmetalle. Das Einformen des Düsenschlitzs erfolgt ebenfalls in üblicher Weise durch Einschleifen; es ist aber darauf zu achten, daß die Längsachse des Düsenschlitzes tatsächlich in der Schnittebene der Fig. 3 zu liegen kommt.The nozzle according to the invention is intended in particular for so-called airless high-pressure spraying the extremely high liquid pressures are used, but can also be used in spraying processes working with lower pressures, for example in the combined compressed air-high pressure process or even in the pure compressed air process. All conventional nozzle materials, in particular sintered metals, such as hard metals, are suitable as materials. The nozzle slot is also shaped in the usual way by grinding in; but it must be ensured that the longitudinal axis of the nozzle slot actually comes to lie in the sectional plane of FIG. 3.

Claims (2)

Flachstrahldüse für Sprühgeräte zum Beschichten von Werkstücken mit Flüssigkeiten, insbesondere zum Hochdrucksprühen, mit einem zylindrischen Flüssigkeits-Zuführkanal und einem Düsenschlitz, wobei der Zylinderkanal einen domartigen Abschluß mit halbkreisförmigem Querschnitt in einer durch die Düsenmittelachse hindurchgehenden Schnittebene aufweist und der Düsenschlitz in den Dom einschneidet, dadurch gekennzeichnet, daß der Dom (26) bezüglich der Düsenmittelachse (M) rotationsunsymmetrisch ausgebildet ist, derart, daß der Dom (26) nur in der mit der Düsenschlitzebene zusammenfallenden Schnittebene durch die Düsenmittelachse (M) halbkreisförmigen Querschnitt aufweist, in der dazu senkrechten Schnittebene durch die Düsenmittelachse (M) dagegen einen Querschnitt in Form eines Spitzbogens' der aus zwei Teilkreisen (26a,26b) besteht, die von einem gemeinsamen, mit dem Schnittpunkt des Halbkreises der erstgenannten Schnittebene mit der Düsenmittelachse (M) zusammenfallenden Punkt (S) auf der Düsenmittelachse (M) ausgehen und symmetrisch beidseits dieser Achse verlaufend tangierend in den Zylinderteil (25) einmünden, wobei der Radius (RT) der Teilkreise (26a, 26b) größer ist als der Radius (RH) des Halbkreises der erstgenannten Schnittebene, und daß der halbkreisförmige und der spitzbogenförmige Querschnitt um die Düsenmittelachse (M) herum stetig ineinander übergehen.Flat jet nozzle for spraying devices for coating workpieces with liquids, in particular for high pressure spraying, with a cylindrical liquid supply channel and a nozzle slot, the cylinder channel having a dome-like termination with a semicircular cross section in a sectional plane passing through the nozzle center axis and the nozzle slot cutting into the dome, thereby characterized in that the dome (26) is rotationally asymmetrical with respect to the nozzle center axis (M), such that the dome (26) has a semicircular cross section only in the section plane coinciding with the nozzle slot plane, and in the section plane perpendicular thereto the nozzle center axis (M), on the other hand, has a cross section in the form of an ogive 'which consists of two part circles (26a, 26b) which coincide with the nozzle center axis (M) from a common one, with the intersection of the semicircle of the first-mentioned cutting plane end the point (S) on the nozzle center axis (M) and flow into the cylinder part (25) tangentially running tangentially on both sides of this axis, the radius (R T ) of the pitch circles (26a, 26b) being larger than the radius (R H ) of the semicircle of the first-mentioned sectional plane, and that the semicircular and the ogival cross section continuously merge into one another around the nozzle center axis (M). Düse nach Anspruch 1, dadurch gekennzeichnet, daß das Verhältnis des Teilkreisradius (RT) des Spitzbogen-Querschnitts zum Halbkreisradius (RH) des Halbkreis-Querschnitts zwischen 1,4:1 und 3,0:1 liegt.Nozzle according to Claim 1, characterized in that the ratio of the pitch circle radius (R T ) of the ogival cross section to the semicircle radius (R H ) of the semicircle cross section is between 1.4: 1 and 3.0: 1.
EP91103965A 1990-05-31 1991-03-14 Fan spray nozzle Expired - Lifetime EP0459096B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4017594A DE4017594A1 (en) 1990-05-31 1990-05-31 FLAT JET NOZZLE
DE4017594 1990-05-31

Publications (2)

Publication Number Publication Date
EP0459096A1 true EP0459096A1 (en) 1991-12-04
EP0459096B1 EP0459096B1 (en) 1994-12-21

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ID=6407579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103965A Expired - Lifetime EP0459096B1 (en) 1990-05-31 1991-03-14 Fan spray nozzle

Country Status (4)

Country Link
US (1) US5167371A (en)
EP (1) EP0459096B1 (en)
JP (1) JPH04227869A (en)
DE (2) DE4017594A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3609109B2 (en) * 1992-12-08 2005-01-12 フロー インターナショナル コーポレイション Super high pressure fan jet nozzle
US5464154A (en) * 1993-09-29 1995-11-07 Union Carbide Chemicals & Plastics Technology Corporation Methods for spraying polymeric compositions with compressed fluids and enhanced atomization
DE19541174C2 (en) * 1995-11-04 1998-11-26 Spraying Systems Deutschland G High performance jet nozzle
US20040155125A1 (en) * 2003-02-11 2004-08-12 Kramer Martin S. High pressure fluid jet nozzles and methods of making
FR2928567B1 (en) * 2008-03-14 2012-11-02 Exel Ind LIQUID SPRAY NOZZLE AND LIQUID SPRAYER COMPRISING SUCH A NOZZLE
US9138753B1 (en) 2010-09-02 2015-09-22 Hiroshi Takahara Spray nozzle and the application
US10350617B1 (en) * 2016-02-12 2019-07-16 Konstantin Dragan Composition of and nozzle for spraying a single-component polyurethane foam
US10702876B2 (en) * 2016-06-03 2020-07-07 Konstantin Dragan System, composition, and method for dispensing a sprayable foamable product
US10815353B1 (en) 2016-06-03 2020-10-27 Konstantin Dragan Composition of and nozzle for spraying a single-component polyurethane foam

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE1435393A1 (en) * 1960-12-01 1969-01-23 Celanese Corp Spinneret
US3843055A (en) * 1973-07-18 1974-10-22 Nordson Corp Spray nozzle
DE3414880A1 (en) * 1984-04-19 1985-10-24 Lechler Gmbh & Co Kg FLAT JET SPRAY NOZZLE, ESPECIALLY FOR SPRAYING PLANT PROTECTION PRODUCTS

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US1753443A (en) * 1927-05-31 1930-04-08 John D Murray Tip for spraying nozzles
US2305210A (en) * 1940-10-28 1942-12-15 Spraying Systems Co Spray shaper
US2743138A (en) * 1952-05-31 1956-04-24 Spraying Systems Co Spray nozzle with side vented discharge end
US2985386A (en) * 1958-07-18 1961-05-23 William F Steinen Spray nozzle
JPS53413B2 (en) * 1971-08-07 1978-01-09
US4097000A (en) * 1975-07-07 1978-06-27 Derr Bernard A Spray nozzle
JPS6079563U (en) * 1983-11-02 1985-06-03 株式会社いけうち spray nozzle
DE3339222C2 (en) * 1983-10-28 1986-10-09 J. Wagner Gmbh, 7990 Friedrichshafen High pressure nozzle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1435393A1 (en) * 1960-12-01 1969-01-23 Celanese Corp Spinneret
US3843055A (en) * 1973-07-18 1974-10-22 Nordson Corp Spray nozzle
DE3414880A1 (en) * 1984-04-19 1985-10-24 Lechler Gmbh & Co Kg FLAT JET SPRAY NOZZLE, ESPECIALLY FOR SPRAYING PLANT PROTECTION PRODUCTS

Also Published As

Publication number Publication date
US5167371A (en) 1992-12-01
DE59103956D1 (en) 1995-02-02
EP0459096B1 (en) 1994-12-21
DE4017594A1 (en) 1991-12-12
JPH04227869A (en) 1992-08-17

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