EP1280610B1 - External mixing nozzle - Google Patents
External mixing nozzle Download PDFInfo
- Publication number
- EP1280610B1 EP1280610B1 EP02719976A EP02719976A EP1280610B1 EP 1280610 B1 EP1280610 B1 EP 1280610B1 EP 02719976 A EP02719976 A EP 02719976A EP 02719976 A EP02719976 A EP 02719976A EP 1280610 B1 EP1280610 B1 EP 1280610B1
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- EP
- European Patent Office
- Prior art keywords
- surface portion
- flat
- nozzle
- jet cap
- axis
- 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.)
- Expired - Lifetime
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Classifications
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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
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
Definitions
- the invention relates to an external mixing nozzle according to the Preamble of claim 1.
- External mixing nozzles are used in particular for coating pharmaceutical products such as tablets with paint.
- the pharmaceutical products are in a rotatable drum arranged (coating drum), while the outer mixing nozzles are arranged on an axis parallel to the drum axis to atomize the ink material vertically within the drum.
- the paint mist and the products moved by the drum rotation coat them with the paint.
- the external mixing nozzles used for this purpose consist of a nozzle body to which a flat jet cap is attached.
- the flat-jet cap is provided with a substantially planar surface portion having a central receiving opening for receiving the mouth approach of a liquid insert, said central opening defines an annular gap surrounding the mouth approach and acts as an air nozzle.
- horns On both sides of the flat surface portion are located approximately perpendicularly projecting horns from the surface portion, which are each provided with holes which extend obliquely to the axis of the nozzle.
- These diametrically opposite horns thus include air nozzles which extend obliquely to the axis of the nozzle and cause a flattening of the jet of color or liquid, which is produced by the exiting from the mouth approach and atomized through the annular gap liquid.
- the horns are formed on the surface facing the central opening of the jet cap away widening conically. Laterally of the surface portion, the jet cap is chamfered, wherein edges are formed between the surface portion and the chamfer.
- Comparable nozzles and corresponding flat jet caps are known eg from spray guns according to document US-2 475 000.
- a disadvantage of these external mixing nozzles is the fact that on the one hand due to the comparatively large distance between the outlet openings formed in the horns air nozzles and the central opening of the jet cap and as a result of located on the jet cap edges and horns color deposits and beard formation on the surface of the flat jet cap occur , which over time worsen the spray effect or the quality of the color coating or even prevent the spray effect.
- the invention is therefore based on the object, a bornmischdüse according to the preamble of claim 1 so to improve that color deposits or beard on the Flat jet cap can be largely prevented.
- the invention in particular provides an external mixing nozzle a flat jet cap, wherein the flat jet cap a central opening for the mouth approach of the Has liquid insert, wherein the central opening in a substantially flat surface portion without horns is arranged, which extends transversely to the nozzle axis and to the laterally join surfaces that are both symmetrical as are also provided greatly inclined to the nozzle axis, wherein the Transition areas between the surface portion and the Side surfaces are rounded to avoid edges.
- Mirror-symmetric to the nozzle axis and within the plane Surface area lying are laterally to the central opening Air outlet openings provided in comparable short Distance to the central opening are arranged and at an angle to the Open nozzle axis extending holes.
- the known external mixing nozzle according to FIG. 1 has a Flat jet cap 1, which consists of a substantially cylindrical body 2 is made, which at its outward, i.e. pointing in the direction of spraying a cross to Has nozzle axis extending surface 3, which with a central opening 4 is provided for receiving the Mouthpiece approach of a liquid insert, not shown.
- Side of the central opening 3 are horns 6, 7, the each two air outlet openings 9, 10 included, in such a way that the air flow emerging from these openings 9, 10 inclined with respect to the nozzle axis.
- the just or straight extending surface portion 3 is about edges 11 with lateral, obliquely opposite the nozzle axis Surfaces 12 in connection.
- These surfaces 12 are opposite a plane that is perpendicular to the nozzle axis, only slightly beveled.
- the horns 6, 7 are above the surface portion 3 before. As it turns out, the openings 9, 10 receiving surfaces of the horns 6, 7 in the direction of Nozzle axis outwardly conically widening formed.
- FIG. 2 shows a sectional view through the invention External mixing.
- the external mixing nozzle has a nozzle body 10 on which a flat-jet cap 11 is attached.
- the Attachment of the flat-jet cap 11 is preferably carried out by means of a union nut 12, the thread 13 of the Nozzle body is screwed on.
- the flat-jet cap 11 is provided with a central bore 15 provided in accordance with Figure 2 one on a liquid insert 16 tuned shape, such as conical shape, can have and the liquid insert 16 receives.
- One with 17 designated mouth approach of the liquid insert 16 is located within a central opening 18 of the flat-jet cap 11, wherein the mouth attachment 17 according to Figures 2 and 3 with respect to Flat jet cap 11 can protrude.
- the central opening 18 of the Flat-jet cap 11 defines the mouth approach 17th surrounding annular gap 20, through which air emerges, which the atomization of the from the mouth approach 17th leaking liquid material, e.g. Color, causes.
- the flat-jet cap 11 also has a substantially plane or straight surface portion 21 (without Horns), which is perpendicular to the nozzle axis and according to Figure 2 over the entire width of the flat-jet cap 11th runs. Laterally to the surface portion 21 close Surfaces 22, 23, as can be seen in FIG. Of the Transition between the surface portion 21 and the surfaces 22, 23 is rounded, i. without formation of edges, like this is apparent from Figures 3 and 4.
- the air outlet openings 24, 25 are in proportion to the known external mixing nozzle according to Figure 1 in a relatively close distance arranged to the central opening 18.
- the ratio is close Arrangement of the air outlet openings 24, 25 with respect to the central opening 18 on the one hand and the gentle transition from the surface portion 21 to the inclined surfaces 22, 23 prevented Usually a color deposit on the flat-jet cap according to the present invention.
- the inclined surfaces 22, 23 are in a preferred embodiment under a Angle of about 55 ° to the nozzle axis, which is a flow-directed air duct is appropriate, i. that during the coating process, a backflow at the Nozzle can be passed, in such a way streamlined, that the deposition of a color coating on the nozzle cap or flat jet cap 11 practically largely is prevented. It is essential in the present invention Also, that the design of the flat-jet cap no edges which further reduces the deposition of dyes counteracted.
- the center is located in the nozzle body 10 and centrally in the liquid insert 16 in known manner, a nozzle needle 27 whose tip in the Mouth approach 17 extends.
- the nozzle axis is designated 14 in FIGS. 2 and 3.
- the holes 26, 27 are preferably parallel to the Axis 14 extending channels or holes 31, 32 in Connection with corresponding feed channels on the part of Nozzle body 10 are connected and the supply of air serve.
- the flat-jet cap 11 consists, as can be seen from FIGS. 2 to 4 results, essentially from a cylindrical body, to its front by the perpendicular to the nozzle axis extending planar surface portion 21 extends and continues is defined by inclined surfaces 22, 23 which are symmetrical to Nozzle axis of the strip-shaped surface portion 21 in Direction of the union nut 12 widening trapezoidal run.
- the external mixing nozzle according to the invention also has the advantage that by the short distances between the Air outlet openings 24 and 25 on the one hand to the the central opening 18 on the other hand, the result of the Air outlet from this opening resulting forming forces a have a high effect on the color ray that comes from the Mündungsungsansatz 17 of the liquid insert 16 exits, wherein this effect is much stronger than in a External mixing nozzle with a flat jet cap according to FIG. 1.
- the optimal atomization quality of the invention External mixing nozzle is according to a preferred embodiment then reached when the holes 26, 27 has a diameter of 2.0 mm and the central opening 18 has a diameter of about 4.2 mm. In such an optimization will at least Ensures the same atomization quality as one External mixing nozzle with a flat jet cap according to FIG. 1.
- Lacquers such as cellulose finishes and Eudragit atomized.
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- Nozzles (AREA)
- Lubricants (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Die Erfindung betrifft eine Außenmischdüse gemäß dem
Oberbegriff des Patentanspruchs 1.The invention relates to an external mixing nozzle according to the
Preamble of
Außenmischdüsen werden insbesondere zur Beschichtung von
pharmazeutischen Produkten wie Tabletten mit Farbe verwendet.
Hierbei befinden sich die pharmazeutischen Produkte in einer
drehfähig angeordneten Trommel (coating-trommel), während die
Außenmischdüsen auf einer zur Trommelachse parallelen Achse
angeordnet sind, um das Farbmaterial senkrecht innerhalb der
Trommel zu zerstäuben. Durch den Farbnebel und die durch die
Trommelrotation bewegten Produkte werden diese mit der Farbe
beschichtet. Die zu diesem Zweck verwendeten Außenmischdüsen
bestehen aus einem Düsenkörper, an dem eine Flachstrahlkappe
befestigt ist. Die Flachstrahlkappe ist mit einem im
wesentlichen eben verlaufenden Flächenabschnitt versehen, der
mittig eine Aufnahmeöffnung aufweist zur Aufnahme des
Mündungsansatzes eines Flüssigkeitseinsatzes, wobei diese
mittige Öffnung einen Ringspalt definiert, der den
Mündungsansatz umgibt und als Luftdüse wirkt. Beidseitig des
flachen Flächenabschnittes befinden sich vom Flächenabschnitt
etwa senkrecht abstehende Hörner, die jeweils mit Bohrungen
versehen sind, die zur Achse der Düse schräg verlaufen. Diese
diametral einander gegenüber liegenden Hörner beinhalten somit
Luftdüsen, die schräg zur Achse der Düse verlaufen und eine
Abflachung des Farbstrahles bzw. Flüssigkeitsstrahles
hervorrufen, der durch die aus dem Mündungsansatz austretende
und durch den Ringspalt zerstäubte Flüssigkeit erzeugt wird.
Bei dieser bekannten Außenmischdüse sind die Hörner auf ihrer
zur mittigen Öffnung gerichteten Fläche von der Strahlkappe
weg konisch erweiternd ausgebildet.
Seitlich des Flächenabschnittes ist die Strahlkappe
abgeschrägt, wobei zwischen dem Flächenabschnitt und der
Abschrägung Kanten gebildet werden.
Vergleichbare Düsen und entsprechende Flachstrahlkappen sind z.B.
von Sprühpistolen gemäß Dokument US-2 475 000 bekannt.
Nachteilig bei diesen Außenmischdüsen ist die Tatsache, dass
zum einen aufgrund der vergleichsweise großen Distanz zwischen
den Austrittsöffnungen der in den Hörnern ausgebildeten
Luftdüsen und der mittigen Öffnung der Strahlkappe sowie
infolge der an der Strahlkappe befindlichen Kanten und Hörner
Farbablagerungen und Bartbildungen auf der Oberfläche der
Flachstrahlkappe auftreten, die im Laufe der Zeit den
Sprüheffekt bzw. die Qualität der Farbbeschichtung
verschlechtern bzw. den Sprüheffekt sogar verhindern können.External mixing nozzles are used in particular for coating pharmaceutical products such as tablets with paint. Here, the pharmaceutical products are in a rotatable drum arranged (coating drum), while the outer mixing nozzles are arranged on an axis parallel to the drum axis to atomize the ink material vertically within the drum. The paint mist and the products moved by the drum rotation coat them with the paint. The external mixing nozzles used for this purpose consist of a nozzle body to which a flat jet cap is attached. The flat-jet cap is provided with a substantially planar surface portion having a central receiving opening for receiving the mouth approach of a liquid insert, said central opening defines an annular gap surrounding the mouth approach and acts as an air nozzle. On both sides of the flat surface portion are located approximately perpendicularly projecting horns from the surface portion, which are each provided with holes which extend obliquely to the axis of the nozzle. These diametrically opposite horns thus include air nozzles which extend obliquely to the axis of the nozzle and cause a flattening of the jet of color or liquid, which is produced by the exiting from the mouth approach and atomized through the annular gap liquid. In this known external mixing nozzle, the horns are formed on the surface facing the central opening of the jet cap away widening conically.
Laterally of the surface portion, the jet cap is chamfered, wherein edges are formed between the surface portion and the chamfer.
Comparable nozzles and corresponding flat jet caps are known eg from spray guns according to document US-2 475 000.
A disadvantage of these external mixing nozzles is the fact that on the one hand due to the comparatively large distance between the outlet openings formed in the horns air nozzles and the central opening of the jet cap and as a result of located on the jet cap edges and horns color deposits and beard formation on the surface of the flat jet cap occur , which over time worsen the spray effect or the quality of the color coating or even prevent the spray effect.
Der Erfindung liegt daher die Aufgabe zugrunde, eine
Außenmischdüse gemäß dem Oberbegriff des Patentanspruchs 1 so
zu verbessern, dass Farbablagerungen bzw. Bartbildung an der
Flachstrahlkappe weitgehend verhindert werden können.The invention is therefore based on the object, a
Außenmischdüse according to the preamble of
Diese Aufgabe wird erfindungsgemäß durch die im
kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale
gelöst. This object is achieved by the im in the
characterizing part of
Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further embodiments of the invention will become apparent from the Dependent claims.
Die Erfindung schafft insbesondere eine Außenmischdüse mit einer Flachstrahlkappe, bei welcher die Flachstrahlkappe eine mittige Öffnung für den Mündungsansatz des Flüssigkeitseinsatzes aufweist, wobei die mittige Öffnung in einem im wesentlichen ebenen Flächenabschnitt ohne Hörner angeordnet ist, der quer zur Düsenachse verläuft und an den sich seitlich Flächen anschließen, die sowohl symmetrisch als auch stark geneigt zur Düsenachse vorgesehen sind, wobei die Übergangsbereiche zwischen dem Flächenabschnitt und den seitlichen Flächen zur Vermeidung von Kanten abgerundet sind. Spiegelsymmetrisch zur Düsenachse und innerhalb des ebenen Flächenbereichs liegend sind seitlich zur mittigen Öffnung Luftaustrittsöffnungen vorgesehen, die in vergleichbar kurzem Abstand zur mittigen Öffnung angeordnet sind und in schräg zur Düsenachse verlaufenden Bohrungen münden.The invention in particular provides an external mixing nozzle a flat jet cap, wherein the flat jet cap a central opening for the mouth approach of the Has liquid insert, wherein the central opening in a substantially flat surface portion without horns is arranged, which extends transversely to the nozzle axis and to the laterally join surfaces that are both symmetrical as are also provided greatly inclined to the nozzle axis, wherein the Transition areas between the surface portion and the Side surfaces are rounded to avoid edges. Mirror-symmetric to the nozzle axis and within the plane Surface area lying are laterally to the central opening Air outlet openings provided in comparable short Distance to the central opening are arranged and at an angle to the Open nozzle axis extending holes.
Erfindungsgemäß werden Ablagerungen der Flüssigkeit bzw. Farbe auf der Flachstahlkappe vermieden, d.h. ein Belag auf der Flachstahlkappe und/oder eine Bartbildung an den Hörnern, jeweils aus den Flüssigkeitssubstanzen, wird ausgeschlossen oder zumindest weitgehend vermieden.According to the invention deposits of the liquid or color avoided on the flat steel cap, i. a topping on the Flat steel cap and / or a beard on the horns, each from the liquid substances is excluded or at least largely avoided.
Nachfolgend wird eine bevorzugte Ausführungsform der erfindungsgemäßen Außenmischdüse anhand der Zeichnung zur Erläuterung weiterer Merkmale und Vorteile beschrieben. Es zeigen:
- Fig. 1:
- eine Seitenansicht einer bekannten Flachstrahlkappe einer Außenmischdüse,
- Fig. 2:
- eine Schnittansicht durch die erfindungsgemäße Außenmischdüse,
- Fig. 3:
- eine weitere Schnittansicht der Außenmischdüse, wobei
die Darstellung gemäß Figur 3 gegenüber
Figur 2 um 90° gedreht ist, und - Fig. 4:
- eine perspektivische Ansicht der erfindungsgemäßen Außenmischdüse.
- Fig. 1:
- a side view of a known flat-jet cap of an external mixing nozzle,
- Fig. 2:
- a sectional view through the external mixing nozzle according to the invention,
- 3:
- a further sectional view of the outer mixing nozzle, wherein the illustration is rotated according to Figure 3 with respect to Figure 2 by 90 °, and
- 4:
- a perspective view of the external mixing nozzle according to the invention.
Die bekannte Außenmischdüse weist gemäß Figur 1 eine
Flachstrahlkappe 1 auf, die aus einem im wesentlichen
zylindrischen Grundkörper 2 besteht, der an seiner nach außen,
d.h. in Sprührichtung weisenden Richtung eine quer zur
Düsenachse verlaufende Fläche 3 aufweist, die mit einer
mittigen Öffnung 4 versehen ist zur Aufnahme des
Mündungsansatzes eines nicht gezeigten Flüssigkeitseinsatzes.
Seitlich der mittigen Öffnung 3 befinden sich Hörner 6, 7, die
jeweils zwei Luftaustrittsöffnungen 9, 10 enthalten, derart,
dass die aus diesen Öffnungen 9, 10 austretende Luftströmung
gegenüber der Düsenachse geneigt ist. Der eben bzw. gerade
verlaufende Flächenabschnitt 3 steht über Kanten 11 mit
seitlichen, gegenüber der Düsenachse schräg verlaufenden
Flächen 12 in Verbindung. Diese Flächen 12 sind gegenüber
einer Ebene, die senkrecht zur Düsenachse steht, nur leicht
abgeschrägt. Die Hörner 6, 7 stehen über dem Flächenabschnitt
3 vor. Wie sich weiter ergibt, sind die die Öffnungen 9, 10
aufnehmenden Flächen der Hörner 6, 7 in Richtung der
Düsenachse nach außen konisch erweiternd ausgebildet.The known external mixing nozzle according to FIG. 1 has a
Figur 2 zeigt eine Schnittansicht durch die erfindungsgemäße
Außenmischdüse. Die Außenmischdüse weist einen Düsenkörper 10
auf, an welchem eine Flachstrahlkappe 11 befestigt ist. Die
Befestigung der Flachstrahlkappe 11 erfolgt vorzugsweise
mittels einer Überwurfmutter 12, die auf ein Gewinde 13 des
Düsenkörpers aufgeschraubt wird.FIG. 2 shows a sectional view through the invention
External mixing. The external mixing nozzle has a
Die Flachstrahlkappe 11 ist mit einer mittigen Bohrung 15
versehen, die gemäß Figur 2 eine auf einen Flüssigkeitseinsatz
16 abgestimmte Form, beispielsweise konusförmige Gestalt,
haben kann und den Flüssigkeitseinsatz 16 aufnimmt. Ein mit 17
bezeichneter Mündungsansatz des Flüssigkeitseinsatzes 16 liegt
innerhalb einer mittigen Öffnung 18 der Flachstrahlkappe 11,
wobei der Mündungsansatz 17 gemäß Figur 2 und 3 gegenüber der
Flachstrahlkappe 11 vorstehen kann. Die mittige Öffnung 18 der
Flachstrahlkappe 11 legt einen den Mündungsansatz 17
umgebenden Ringspalt 20 fest, durch welchen Luft austritt,
welcher die Zerstäubung des aus dem Mündungsansatz 17
austretenden Flüssigkeitsmaterials, z.B. Farbe, hervorruft.The flat-
Die Flachstrahlkappe 11 weist weiterhin einen im wesentlichen
ebenen bzw. gerade verlaufenden Flächenabschnitt 21 (ohne
Hörner) auf, der senkrecht zur Düsenachse steht und der gemäß
Figur 2 über die gesamte Breite der Flachstrahlkappe 11
verläuft. Seitlich an den Flächenabschnitt 21 schließen sich
Flächen 22, 23 an, wie dies aus Figur 3 ersichtlich ist. Der
Übergang zwischen dem Flächenabschnitt 21 und den Flächen 22,
23 ist abgerundet gestaltet, d.h. ohne Bildung von Kanten, wie
dies aus Figur 3 und 4 hervorgeht.The flat-
Seitlich der mittigen Öffnung 18 befinden sich im
Flächenabschnitt 21 Austrittsöffnungen 24, 25, die jeweils mit
Bohrungen 26, 27 kommunizieren, welche gegenüber der
Düsenachse geneigt verlaufen. Diese Bohrungen 26, 27 sind
unter einem Winkel von vorzugsweise 45° zur Düsenachse
vorgesehen und bewirken eine Abflachung des Sprühkegels in
Richtung auf einen Flachstrahl. Der Sprühkegel ergibt sich
aufgrund des Austritts der Flüssigkeit aus dem Mündungsansatz
17 und der durch den Ringspalt 20 austretenden Luftströmung.
Der Abstand zwischen der Öffnung 24 bzw. 25 gegenüber der
Düsenachse 14 beträgt vorzugsweise 6,5 mm.Side of the
Die Luftaustrittsöffnungen 24, 25 sind im Verhältnis zu der
bekannten Außenmischdüse nach Figur 1 in relativ naher Distanz
zur mittigen Öffnung 18 angeordnet. Die im Verhältnis nahe
Anordnung der Luftaustrittsöffnungen 24, 25 gegenüber der
mittigen Öffnung 18 einerseits sowie der sanfte Übergang von
dem Flächenabschnitt 21 zu den Schrägflächen 22, 23 verhindert
weitgehendst eine Farbablagerung auf der Flachstrahlkappe
gemäß vorliegender Erfindung. Die schrägen Flächen 22, 23
stehen bei einer bevorzugten Ausführungsform unter einem
Winkel von etwa 55° zur Düsenachse, was einer
strömungsgerichteten Luftführung zweckdienlich ist, d.h. dass
während des Beschichtungsvorganges eine Rückströmung an der
Düse vorbeigeführt werden kann, und zwar derart
strömungsgünstig, dass die Ablagerung eines Farbbelages auf
der Düsenkappe bzw. Flachstrahlkappe 11 praktisch weitgehend
verhindert wird. Wesentlich ist bei vorliegender Erfindung
auch, dass die Gestaltung der Flachstrahlkappe keine Kanten
beinhaltet, wodurch weiterhin der Ablagerung von Farbstoffen
entgegengewirkt wird.The
Wie sich aus Figur 2 und 3 weiter ergibt, befindet sich mittig
im Düsenkörper 10 und mittig im Flüssigkeitseinsatz 16 in an
sich bekannter Weise eine Düsennadel 27, deren Spitze in den
Mündungsansatz 17 hineinreicht.As can be seen from FIGS. 2 and 3, the center is located
in the
Die Düsenachse ist in Figur 2 und 3 mit 14 bezeichnet.The nozzle axis is designated 14 in FIGS. 2 and 3.
Die Bohrungen 26, 27 stehen mit vorzugsweise parallel zur
Achse 14 verlaufenden Kanälen oder Bohrungen 31, 32 in
Verbindung, die mit entsprechenden Zuführkanälen seitens des
Düsenkörpers 10 verbunden sind und der Zuführung von Luft
dienen.The
Aus den Figuren 2 und 3 ist ersichtlich, dass eine Flüssigkeit
wie eine Farbe über den Flüssigkeitseinsatz 11 und den
Mündungsansatz 17 in die in den Zeichnungen nicht dargestellte
Trommel austritt und zugleich über den Ringspalt 20 sowie über
die Austrittsöffnungen 24, 25 eine Luftströmung zur Einwirkung
und zur Steuerung des Farbstrahles ausgeblasen wird.From Figures 2 and 3 it can be seen that a liquid
as a color over the
Die Flachstrahlkappe 11 besteht, wie sich aus Figur 2 - 4
ergibt, im wesentlichen aus einem zylindrischen Körper, der an
seiner Stirnseite durch den senkrecht zur Düsenachse
verlaufenden ebenen Flächenabschnitt 21 verläuft und weiterhin
durch Schrägflächen 22, 23 definiert ist, die symmetrisch zur
Düsenachse von dem streifenförmigen Flächenabschnitt 21 in
Richtung auf die Überwurfmutter 12 trapezförmig erweiternd
verlaufen.The flat-
Die erfindungsgemäße Außenmischdüse hat weiterhin zum Vorteil,
dass durch die kurzen Abstände zwischen den
Luftaustrittsöffnungen 24 und 25 einerseits gegenüber der
mittigen Öffnung 18 andererseits die sich in Folge des
Luftaustritts aus diesen Öffnung ergebenden Formierkräfte eine
hohe Wirkung haben auf den Farbstrahl, der aus dem
Mündungsansatz 17 des Flüssigkeitseinsatzes 16 austritt, wobei
diese Wirkung wesentlich stärker ist als bei einer
Außenmischdüse mit einer Flachstrahlkappe gemäß Figur 1.The external mixing nozzle according to the invention also has the advantage
that by the short distances between the
Die optimale Zerstäubungsqualität der erfindungsgemäßen
Außenmischdüse wird gemäß einer bevorzugten Ausführungsform
dann erreicht, wenn die Bohrungen 26, 27 einen Durchmesser von
2,0 mm und die mittige Öffnung 18 einen Durchmesser von etwa
4,2 mm aufweisen. Bei einer solchen Optimierung wird zumindest
die gleiche Zerstäubungsqualität gewährleistet, wie bei einer
Außenmischdüse mit einer Flachstrahlkappe gemäß Figur 1.The optimal atomization quality of the invention
External mixing nozzle is according to a preferred embodiment
then reached when the
Mit der erfindungsgemäßen Außenmischdüse werden insbesondere Lacke wie Zelluloselacke und Eudragit zerstäubt.In particular, with the external mixing nozzle according to the invention Lacquers such as cellulose finishes and Eudragit atomized.
Claims (6)
- An external mixing nozzle, with a flat-jet cap (11) which is fastened to a nozzle body (10), the flat-jet cap (11) being provided with a central bore (15) or the like, pointing towards the nozzle body (10), for receiving a liquid insert (16), and having a central orifice (18) which receives a mouth attachment (17) of the liquid insert (16), at the same time defining an annular gap (20) surrounding the mouth attachment (17), the flat-jet cap (11) defining a planar surface portion (21) which runs perpendicularly to the axis of the nozzle body (10) and within which the central orifice (18) is provided, and, furthermore, the planar surface portion (21) having adjoining it laterally two surfaces (22, 23) running essentially mirror-symmetrically and obliquely to the axis (14) of the nozzle body (10) and adjoining the planar surface portion (21), wherein the flat-jet cap (11) contains, in the region of the surface portion (21), outlet orifices (24, 25) which are provided at an equal distance from the central orifice (18) and which communicate with bores (26, 27) provided so as to run in the flat-jet cap (11) obliquely to the axis of the nozzle body (10), the transitions from the planar surface portion (21) to the lateral surfaces (22, 23) being defined by smooth transitions or roundings.
- The external mixing nozzle as claimed in claim 1, wherein the outlet orifices (24, 25) are provided mirror-symmetrically to the axis (14) of the nozzle body (10).
- The external mixing nozzle as claimed in claim 1 or 2, wherein the distance between the central orifice (18) and the outlet orifices (24, 25) is about 6.5 mm.
- The external mixing nozzle as claimed in at least one of the preceding claims, wherein the mouth attachment (17) of the liquid insert (16) projects with respect to the surface portion (21).
- The external mixing nozzle as claimed in at least one of the preceding claims, wherein the lateral surfaces (22, 23) run at an angle of about 55° to the axis (14) of the nozzle.
- The external mixing nozzle as claimed in at least one of the preceding claims, wherein the diameter of the central orifice (18) is about 4.2 mm and the diameter of the oblique bores (26, 27) is in each case about 2.0 mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10112562 | 2001-03-15 | ||
| DE10112562A DE10112562B4 (en) | 2001-03-15 | 2001-03-15 | external mixing |
| PCT/EP2002/002199 WO2002074446A1 (en) | 2001-03-15 | 2002-02-28 | External mixing nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1280610A1 EP1280610A1 (en) | 2003-02-05 |
| EP1280610B1 true EP1280610B1 (en) | 2005-05-25 |
Family
ID=7677628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02719976A Expired - Lifetime EP1280610B1 (en) | 2001-03-15 | 2002-02-28 | External mixing nozzle |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7051954B2 (en) |
| EP (1) | EP1280610B1 (en) |
| AT (1) | ATE296166T1 (en) |
| CA (1) | CA2408384C (en) |
| DE (2) | DE10112562B4 (en) |
| ES (1) | ES2242850T3 (en) |
| WO (1) | WO2002074446A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10345342A1 (en) * | 2003-09-19 | 2005-04-28 | Engelhard Arzneimittel Gmbh | Producing an ivy leaf extract containing hederacoside C and alpha-hederin, useful for treating respiratory diseases comprises steaming comminuted ivy leaves before extraction |
| US20140069084A1 (en) * | 2008-03-12 | 2014-03-13 | Albonair Gmbh | Metering System for Spraying a Urea Solution into the Exhaust Gas Stream of an Internal Combustion Engine |
| DE102008013960A1 (en) * | 2008-03-12 | 2009-09-17 | Albonair Gmbh | Dosing system for injecting a urea solution into the exhaust stream of an internal combustion engine |
| US20100282866A1 (en) * | 2009-05-06 | 2010-11-11 | Briggs & Stratton Corporation | Chemical injector for spray device |
| DE202010005280U1 (en) | 2010-04-22 | 2010-08-19 | Düsen-Schlick GmbH | two-fluid nozzle |
| GB2491929B (en) * | 2011-06-17 | 2017-07-26 | Earlex Ltd | Spray gun |
| US20150097061A1 (en) * | 2013-10-04 | 2015-04-09 | SYNCRUDE CANADA LTD. in trust for the owners of the Syncrude Project, as such owners exist now and | Disc centrifuge nozzle |
| US9901943B2 (en) | 2013-10-23 | 2018-02-27 | Briggs & Stratton Corporation | Pressure washer gun with chemical injection and foaming capabilities |
| JP6423495B1 (en) * | 2017-07-21 | 2018-11-14 | 株式会社メンテック | NOZZLE CAP, NOZZLE DEVICE PROVIDED WITH THE SAME |
| JP6982698B2 (en) * | 2017-12-12 | 2021-12-17 | パク， ジョン−スＰＡＲＫ， Ｊｏｎｇ−Ｓｕ | Double nozzle for coaxial control |
| DE102019205743A1 (en) | 2019-04-18 | 2020-10-22 | Glatt Gesellschaft Mit Beschränkter Haftung | Method for controlling or regulating the volume flow of a nozzle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1633291A (en) * | 1926-09-07 | 1927-06-21 | Peerless Pneumatic Systems Inc | Spray gun |
| GB508719A (en) * | 1937-01-25 | 1939-07-05 | Albert Krautzberger | Improvements in apparatus for spraying paint and other substances |
| US2475000A (en) * | 1947-02-26 | 1949-07-05 | Eclipse Air Brush Co | Spray gun nozzle |
| GB8327151D0 (en) * | 1983-10-11 | 1983-11-09 | Marshall Sons & Co Ltd | Spray nozzles |
| DE3709543C2 (en) * | 1987-03-24 | 1996-06-05 | Wagner Gmbh J | Device for atomizing a liquid |
| US5209405A (en) * | 1991-04-19 | 1993-05-11 | Ransburg Corporation | Baffle for hvlp paint spray gun |
| US5979787A (en) * | 1997-12-13 | 1999-11-09 | Usbi Co. | Apparatus and method for convergently applying polymer foam to substrate |
| US5964418A (en) * | 1997-12-13 | 1999-10-12 | Usbi Co. | Spray nozzle for applying metal-filled solventless resin coating and method |
-
2001
- 2001-03-15 DE DE10112562A patent/DE10112562B4/en not_active Expired - Lifetime
-
2002
- 2002-02-28 DE DE50203179T patent/DE50203179D1/en not_active Expired - Lifetime
- 2002-02-28 EP EP02719976A patent/EP1280610B1/en not_active Expired - Lifetime
- 2002-02-28 US US10/275,250 patent/US7051954B2/en not_active Expired - Lifetime
- 2002-02-28 AT AT02719976T patent/ATE296166T1/en active
- 2002-02-28 WO PCT/EP2002/002199 patent/WO2002074446A1/en not_active Application Discontinuation
- 2002-02-28 ES ES02719976T patent/ES2242850T3/en not_active Expired - Lifetime
- 2002-02-28 CA CA002408384A patent/CA2408384C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE10112562B4 (en) | 2005-02-17 |
| US20040035952A1 (en) | 2004-02-26 |
| ATE296166T1 (en) | 2005-06-15 |
| ES2242850T3 (en) | 2005-11-16 |
| WO2002074446A1 (en) | 2002-09-26 |
| DE50203179D1 (en) | 2005-06-30 |
| US7051954B2 (en) | 2006-05-30 |
| EP1280610A1 (en) | 2003-02-05 |
| CA2408384A1 (en) | 2002-10-30 |
| CA2408384C (en) | 2005-01-18 |
| DE10112562A1 (en) | 2002-09-19 |
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