WO2015144867A1 - Procédé et dispositif de production d'un brouillard de liquide - Google Patents

Procédé et dispositif de production d'un brouillard de liquide Download PDF

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Publication number
WO2015144867A1
WO2015144867A1 PCT/EP2015/056676 EP2015056676W WO2015144867A1 WO 2015144867 A1 WO2015144867 A1 WO 2015144867A1 EP 2015056676 W EP2015056676 W EP 2015056676W WO 2015144867 A1 WO2015144867 A1 WO 2015144867A1
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WO
WIPO (PCT)
Prior art keywords
liquid
nozzle
point
impact
distance
Prior art date
Application number
PCT/EP2015/056676
Other languages
German (de)
English (en)
Inventor
Helmut Bauser
Joerg Scriba
Michael Sollinger
Original Assignee
Dieffenbacher GmbH Maschinen- und Anlagenbau
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dieffenbacher GmbH Maschinen- und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen- und Anlagenbau
Publication of WO2015144867A1 publication Critical patent/WO2015144867A1/fr

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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
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • 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
    • B05B7/0853—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 one single gas jet and several jets constituted by a liquid or a mixture containing a liquid

Definitions

  • the invention relates to a method and apparatus for generating liquid mist with a predetermined component of movement, wherein at least two angularly aligned sharply focused liquid jets S 1 , S 2 in an impingement point P which is spatially away from the jet nozzles D 1 , D 2 , meet one another, in particular according to the preambles of claims 1 and 11.
  • the liquid mist N is commonly used for wetting or coating substrates. Particularly preferably, different types of liquids are to be mixed in an impact point or in the liquid mist, possibly in conjunction with other fluids, gases, low-viscosity liquids or the like.
  • a method of the aforementioned type is known from DE 10 2012 204 426 A1.
  • the method for spray coating an article with a hot melt adhesive described in this document teaches ejecting a molten hot melt adhesive through a first die and a second die such that a first melt stream exiting the first die and a second melt stream exiting the second die are sharpened Angle meet each other so that forms a Sprühfambaer, wherein the nozzles are maintained at a predetermined target temperature.
  • a desired viscosity of the hot melt adhesive should be achieved to thereby maintain the desired droplet size of the spray fan.
  • the angle of inclination of the melt jets should always be an acute angle between 10 ° and 80 °. About the distance of the nozzle orifices of the melt jets are given in the aforementioned document no information.
  • Object of the present invention is to improve the generic method and a device so that such a backflow and thus contamination of the nozzle orifices is excluded.
  • the user should be allowed to set a mixing ratio and the degree of mixing in the spray as a function of different liquids. Also, the wear of the nozzles over the useful life
  • a 2 shows the distances of the nozzle orifices DM of the jet nozzles D 1 , D 2 to the solder from the point of impact P on the connecting line V of the nozzle orifices DM of the jet nozzles D 1 , D 2 , b is the distance of the point of impact P from the connecting line V of the nozzle orifices DM and ⁇ 1 , ⁇ 2, the angle of inclination of the liquid jets S 1 , S 2 to the solder from the point of impact P on the connecting line V of the nozzle orifices DM,
  • the distances a 1 , a 2 , the inclination angle ⁇ 1 , ⁇ 2 and the distance b are coordinated so that the nozzle orifices DM remain free from the generated liquid mist.
  • a n , ⁇ n and b can be carried out empirically by experiments.
  • the inclination angle ⁇ of the liquid jets S 1 , S 2 is between 30 ° and 120 °. Especially the range of larger angles of inclination between 80 ° and 120 ° brings, as far as the nebulization, particularly good results in terms of achievable small droplet size of the liquid.
  • the liquid pressure in the nozzle and the nozzle orifice cross-section should be coordinated so that a jet velocity v at the nozzle orifice of 15 - 150 m / sec. results.
  • the number of liquid jets which can be made to produce directional liquid mist N at the point of impact P, can be more than two, as already indicated above by the phrase "at least two".
  • At least one of the liquid jets should be controllable with respect to the direction and / or the jet velocity.
  • a gas jet GS is directed onto the point of impact P.
  • the atomization can be improved by the use of an additional gas jet GS.
  • the use of an additional gas jet GS creates the possibility of finely distributing substance components, for example glue for glue, which is mixed with the gas jet GS into the liquid mist N, which can bring advantages depending on the use or environment of the liquid mist.
  • the liquid jets S 1 ... S n consist of different liquids.
  • the liquid jets S 1 ... S n consist of different liquids.
  • the invention relates to a device, in particular for carrying out the method, with at least two spaced apart on a nozzle carrier DT arranged jet nozzles D 1 , D 2 , which are adapted so that they produce bundled liquid jets S 1 , S 2 and the are aligned at an angle to each other, that the liquid jets S 1 , S 2 meet at a point of impact P on each other.
  • a device is again known from the above-mentioned document DE 10 2012 204 426 A1, FIG. 2 and associated description.
  • the distances a 1 , a 2 of the nozzle mouths DM of the jet nozzles D 1 , D 2 to the solder from the impact point P on the connecting line V of the nozzle orifices DM, and the inclination angle ⁇ 1 , ⁇ 2 of the liquid jets S 1, S 2 to the solder from the point of impact P on the connecting line V of Nozzle mouths DM be coordinated with each other so that the point of impact P is located at such a distance from the nozzle orifices that they remain free from the liquid mist N generated when the liquid jets S 1 , S 2 meet.
  • a further embodiment undergoes the device according to the invention in that a plurality of jet nozzles D 1 - D n , preferably regularly and / or annularly distributed on the nozzle carrier DT are arranged so that all exiting liquid jets lie on the mantle of a cone whose tip is the point of impact P.
  • the angles of inclination ⁇ 1 ... ⁇ n of the liquid jets S 1 ... S n to the perpendicular from the point of impact P to the nozzle plane, which are defined by the nozzle orifices DM are preferably between 15 ° and 60 °.
  • the opening angle of the cone is 2 x ⁇ 1 and should preferably be between 30 ° and 120 °.
  • At least one of the jet nozzles D 1 - D n on the nozzle carrier DT is to be arranged variable in their position and / or their orientation.
  • the orientation or the shape of the generated liquid mist N can be selected depending on the setting of the variable nozzle DV.
  • a gas nozzle DG suitable for a gaseous fluid be provided for liquids.
  • a gas nozzle DG suitable for a gaseous fluid be provided for liquids.
  • the arrangement of the gas nozzle DG for gaseous fluid is preferably selected centrally with respect to the arranged jet nozzles D 1 ... D n for liquids. In this case, the gas nozzle DG has the smallest distance b to the impact point P.
  • a further possibility would be to arrange one of the nozzles D 1 -D n for liquids centrally with respect to the other jet nozzles D 1 -D n in order to meter an additional liquid, preferably discontinuously, without influencing the liquid mist N in its direction and extent.
  • the device can be operated independently, but is preferably suitable for carrying out the method.
  • control and regulation mechanisms valves, measuring instruments, flow meters, control and / or regulating means
  • the method and apparatus in the course of the production of material plates can be used, in which case the adhesive liquor (glue, hardener, aggregates ...) is sprayed onto the still loose material (chips, fibers, nonwoven .9)
  • the glue isocyanate or the like
  • the degree of mixing and the impact with the invention can be adapted to the circumstances.
  • FIG. 1 is a basic schematic representation of the method for generating liquid mist N from two liquid jets S 1 , S 2
  • FIG. 2 shows a first embodiment of a device for carrying out the method as shown in FIG. 1
  • FIG. 3 shows an alternative embodiment of a device according to FIG. 2 with a positionally variable alignment nozzle DV
  • FIG. Fig. 4 shows a further alternative embodiment of the device according to Fig. 2 with a central gas nozzle DG
  • Fig. 5 is a plan view against the nozzle carrier DT in the direction of jet nozzle mouths DM on a device according to FIG. 2, however, with three jet nozzles.
  • the distances a, b and angle ⁇ are once again defined.
  • the distance a defines the distance between the nozzle orifices DM.
  • a 1 is the distance of the nozzle orifice DM from the nozzle D 1 to the solder from the point of impact P on the connecting line V.
  • a 2 is the distance of the nozzle orifice DM of the nozzle D 2 to the solder of Impact point P on the connecting line V.
  • b defined the distance of the connecting line V to the impact point P.
  • the angle ⁇ shows the tilt angle between the liquid jets S 1 - S 2, 1 ⁇ the angle of inclination of the liquid jet S1 to the perpendicular from the impact point P on the connecting line V, ⁇ 2 is the angle of inclination of the liquid jet S 2 to the vertical corresponding to the impact point P on the connecting line V and for several angle ⁇ n the angle of inclination of the liquid jet S n to the solder from the point of impact P on the connecting line V.
  • FIG. 1 In the schematic representation according to FIG. 1, two jet nozzles D 1 and D 2 arranged at a distance from one another are shown, from which bundled liquid jets S 1 , S 2 can emerge.
  • the direction of the liquid jets S 1 , S 2 is indicated by vectors.
  • the vectors are not true to scale, but partly serve in their different length in the figures as an indication of different jet velocities v.
  • the pressure necessary for the production of the bundled liquid jets S 1 , S 2 is established in a conventional manner above the nozzle orifices, which is not shown in detail.
  • the jet nozzles D 1 and D 2 are arranged so that their nozzle orifices DM have a distance of a.
  • the liquid jets S 1 , S 2 meet at the point of impact P, they are atomized in very fine droplets to form a liquid mist N.
  • the liquid mist N extends substantially within the angle of the downwardly continued beam directions S 1 , S 2 .
  • a certain uncontrolled backflow in the direction of the jet nozzles D 1 , D 2 can not be prevented by the meeting of the two bundled liquid jets S 1 , S 2 .
  • the device comprises a substantially cylindrical nozzle carrier DT whose central axis is denoted by TM.
  • TM central axis
  • nozzles D 1 and D 2 are arranged in such a way that the exiting bundled liquid jets S 1 , S 2 meet again in the point of impact P at an angle ⁇ of substantially 90 °.
  • the resulting liquid mist is denoted by N.
  • Fig. 3 of a device according to the invention is shown in a view as it corresponds to FIG. 2.
  • One of the jet nozzles D n which is denoted by DV in the figure, should be changeable in its position and its orientation, which is indicated in Fig. 3, that the nozzle orifice DM is located eccentrically to the nozzle main axis H of the nozzle DV.
  • the vector of the liquid jet and thus the position of the point of impact could be changed.
  • the appearance of the liquid mist N then also changes.
  • the nozzle can be pivoted, which is shown with a pivoting range W as a bow arrow on the nozzle DV.
  • the nozzle DV along a linear movement X can be moved to adjust the impact point P accordingly.
  • an asymmetrically formed liquid mist N results, both as regards the shape and its position in space.
  • the setting of the variable nozzle DV takes place depending on the desired position and shape of the liquid mist N.
  • the arrangement of a variable nozzle DV is possible in combination with one or more other nozzles D N (eg in FIG. 5).
  • Also occurring with the help of adjustable jet nozzles DV wear or other occurring during production changes to the devices can be compensated and a uniform possible spraying over time to be ensured.
  • the gas jet GS also on the impact point P of the liquid jets S n from the jet nozzles D n is addressed.
  • a, in particular central, gas jet GS can once again increase or at least adapt the fogging quality. It may also be useful in the course of atomization to increase the energy content of the individual components in the liquid mist N, for example with steam, in particular in order to improve the mixing itself.
  • a total of three jet nozzles (denoted by D n in FIG. 5) are provided, which are regularly distributed on a circular ring, so that the angular distance from a nozzle D n until the next 120 °.

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  • Nozzles (AREA)

Abstract

L'invention concerne un procédé et un dispositif de production d'un brouillard de liquide (N) ayant une composante de mouvement prédéfinie. Pour cela, on provoque la collision d'au moins deux jets de liquide (S1, S2), disposés en faisceaux faisant un angle entre eux, au niveau d'un point de collision (P) qui est éloigné dans l'espace des buses de projection (D1, D2). La distance (a) entre les orifices de buses (DM) et l'angle d'inclinaison (β) entre les jets de liquide (S1, S2) sont ajustés l'un en fonction de l'autre de telle façon que les orifices (DM) des buses restent dépourvus du brouillard de liquide (N) produit.
PCT/EP2015/056676 2014-03-27 2015-03-27 Procédé et dispositif de production d'un brouillard de liquide WO2015144867A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014104341.3 2014-03-27
DE202014101462.4U DE202014101462U1 (de) 2014-03-27 2014-03-27 Vorrichtung zur Erzeugung von Flüssigkeitsnebel
DE102014104341.3A DE102014104341A1 (de) 2014-03-27 2014-03-27 Verfahren und Vorrichtung zur Erzeugung von Flüssigkeitsnebel

Publications (1)

Publication Number Publication Date
WO2015144867A1 true WO2015144867A1 (fr) 2015-10-01

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PCT/EP2015/056676 WO2015144867A1 (fr) 2014-03-27 2015-03-27 Procédé et dispositif de production d'un brouillard de liquide

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WO (1) WO2015144867A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109195698A (zh) 2016-03-30 2019-01-11 特温特大学 空中制造单一液滴、复合液滴和形状受控(复合)颗粒或纤维的方法和装置
CH713113A1 (de) * 2016-11-08 2018-05-15 Chemspeed Tech Ag Sprühverfahren zur Beschichtung eines Substrats mit einer in einem Gasstrom zerstäubten Substanz.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125298A (en) * 1963-01-31 1964-03-17 Harukichi iwata
US3986672A (en) * 1975-01-31 1976-10-19 Smith Robert L Spray gun system
US5704548A (en) * 1996-05-01 1998-01-06 Graves Spray Supply, Inc. Spray nozzle having air shaping orifices and reversing structure for cleaning
DE102006058756A1 (de) * 2006-07-10 2008-01-17 Bartels Mikrotechnik Gmbh Düsenanordnung
DE102012204426A1 (de) 2012-03-20 2013-09-26 Baumer Hhs Gmbh Vorrichtung und Verfahren zum Sprühbeschichten eines Gegenstands mit einem Heißkleber

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125298A (en) * 1963-01-31 1964-03-17 Harukichi iwata
US3986672A (en) * 1975-01-31 1976-10-19 Smith Robert L Spray gun system
US5704548A (en) * 1996-05-01 1998-01-06 Graves Spray Supply, Inc. Spray nozzle having air shaping orifices and reversing structure for cleaning
DE102006058756A1 (de) * 2006-07-10 2008-01-17 Bartels Mikrotechnik Gmbh Düsenanordnung
DE102012204426A1 (de) 2012-03-20 2013-09-26 Baumer Hhs Gmbh Vorrichtung und Verfahren zum Sprühbeschichten eines Gegenstands mit einem Heißkleber

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DE202014101462U1 (de) 2015-05-29
DE102014104341A1 (de) 2015-10-01

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