EP2595759B1 - Statischer sprühmischer - Google Patents

Statischer sprühmischer Download PDF

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Publication number
EP2595759B1
EP2595759B1 EP11718397.0A EP11718397A EP2595759B1 EP 2595759 B1 EP2595759 B1 EP 2595759B1 EP 11718397 A EP11718397 A EP 11718397A EP 2595759 B1 EP2595759 B1 EP 2595759B1
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EP
European Patent Office
Prior art keywords
mixer
longitudinal axis
accordance
mixer housing
static spray
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.)
Active
Application number
EP11718397.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2595759A1 (de
Inventor
Andreas Hiemer
Carsten Dr STEMICH
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.)
Medmix Switzerland AG
Original Assignee
Sulzer Mixpac AG
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Publication date
Application filed by Sulzer Mixpac AG filed Critical Sulzer Mixpac AG
Priority to EP11718397.0A priority Critical patent/EP2595759B1/de
Publication of EP2595759A1 publication Critical patent/EP2595759A1/de
Application granted granted Critical
Publication of EP2595759B1 publication Critical patent/EP2595759B1/de
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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
    • B05B7/0861—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 jet constituted by a liquid or a mixture containing a liquid and several gas jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
    • B01F25/4321—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa the subflows consisting of at least two flat layers which are recombined, e.g. using means having restriction or expansion zones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/72—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles
    • 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
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • 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
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
    • 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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00503—Details of the outlet element
    • B05C17/00506—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container
    • B05C17/00509—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container of the bayonet type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00503—Details of the outlet element
    • B05C17/00506—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container
    • B05C17/00513—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container of the thread type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components

Definitions

  • the invention relates to a static spray mixer for mixing and spraying of at least two flowable components according to the preamble of the independent claim.
  • Static mixers for mixing at least two flowable components are for example in the EP-A-0 749 776 and in the EP-A-0 815 929 described. Despite their simple, material-saving construction of their mixer structure, these very compact mixers produce good mixing results, especially when mixing highly viscous substances such as sealants, two-component foams, or two-component adhesives. Typically, such static mixers are designed for single use and are often used for curing products in which the mixer practically can not be cleaned.
  • the two components are atomized at the outlet of the mixer by exposure to a medium such as air and can then be applied in the form of a spray or spray on the desired substrate.
  • a medium such as air
  • the mixed components are atomized at the outlet of the mixer by exposure to a medium such as air and can then be applied in the form of a spray or spray on the desired substrate.
  • this technology can in particular also higher-viscosity coating media, for.
  • polyurethanes, epoxy resins or the like can be processed.
  • a device for such applications is for example in the US-B-6,951,310 disclosed.
  • a tubular mixer housing is provided, which receives the mixing element for the static mixture and which has an external thread at one end, onto which an annular nozzle body is screwed.
  • the nozzle body also has an external thread.
  • a cone-shaped Zerstäuberelement is placed, which has on its conical surface a plurality of longitudinal grooves.
  • a cap is inverted, the inner surface is also designed conical, so that it rests against the conical surface of the atomizer. Consequently, the grooves form flow channels between the atomizer element and the cap.
  • the cap is fixed together with the atomizer element by means of a union nut, which is screwed onto the external thread of the nozzle body, on the nozzle body.
  • the nozzle body has a connection for compressed air. In operation, the compressed air flows from the nozzle body through the flow channels between the atomizer element and the cap and atomizes the material emerging from the mixing element.
  • a structurally much simpler static spray mixer is in the European Patent Application No. 09168285 Sulzer Mixpac AG.
  • the mixer housing and the atomizing nozzle are each designed in one piece, wherein the grooves forming the flow channels are provided in the inner surface of the atomizing sleeve or in the outer surface of the mixer housing.
  • the invention thus proposes a static spray mixer for mixing and spraying at least two flowable components, comprising a tubular mixer housing extending in the direction of a longitudinal axis up to a distal end having an outlet opening for the components, with at least one arranged in the mixer housing Mixing element for mixing the components as well as with a Zerstäubungshülse having an inner surface which encloses the mixer housing in its end region, wherein the Zerstäubungshülse having an inlet channel for a pressurized sputtering medium, wherein in the outer surface of the mixer housing or in the inner surface of the Zerstäubungshülse several themselves each extending to the distal end grooves are provided which form separate flow channels between the atomizing sleeve and the mixer housing through which the atomizing medium from the inlet channel of the atomizer Bung sleeve can flow to the distal end of the mixer housing.
  • the inlet channel is arranged asymmetrically with respect to the longitudinal axis, such that the inlet channel has a central axis and is arranged such that the central axis does not intersect the longitudinal axis, but has a vertical distance from the longitudinal axis.
  • the flow channels are provided in the mixer housing or in the atomizing sleeve, a particularly simple structure of the static spray mixer results, without concessions to the quality of mixing or atomization being necessary for this purpose.
  • the optimal use of the individual components enables a cost-effective and economical production of the spray mixers, which moreover can-at least largely-be carried out automatically.
  • the inventive static spray mixer requires only three components, namely the one-piece mixer housing, the atomizer sleeve and the mixing element, which may also be configured in one piece. This results in a low complexity and ease of manufacture or assembly.
  • the inlet channel opens into the inner surface of the atomizing sleeve perpendicular to the longitudinal axis.
  • the mixer housing has a distal end region, which tapers towards the distal end and in which the inner surface of the atomization sleeve is designed to cooperate with the distal end region.
  • This rejuvenation improves the atomization effect. In particular, this can realize a conical flow of the atomizing medium.
  • the outer surface of the mixer housing in the distal end region is at least partially designed as a frustoconical surface or as a curved surface in the axial direction in order to realize a particularly good interaction with the atomizing sleeve.
  • the extension of the grooves also has a component in the circumferential direction.
  • the rotational movement of the atomizing medium can be amplified about the longitudinal axis when flowing through the flow channels, which has an advantageous effect on a uniform and reproducible spraying.
  • the grooves have a substantially spiral profile with respect to the longitudinal axis A.
  • the flow channels are preferably designed according to the principle of a Laval nozzle with a first narrowing in the flow direction and then widening flow cross-section. This measure results in an additional acceleration of the sputtering medium, for example on supersonic speed, resulting in the higher energy input.
  • An advantageous measure for realizing the principle of a Laval nozzle is that the grooves narrow in the direction of flow with respect to the circumferential direction.
  • the circumferential direction is meant the direction in which the inner surface of the atomizing sleeve or the outer surface of the mixer housing extends in the direction perpendicular to the longitudinal axis direction.
  • each groove is delimited by two walls, of which at least one is curved in the direction of flow.
  • each flow channel in the flow direction in each case a changing inclination to the longitudinal axis.
  • the changing inclination of the flow channels is realized in that each groove seen in the flow direction has three consecutively arranged sections, wherein the central portion has an inclination to the longitudinal axis, which is greater than the inclination of the two adjacent sections. It is particularly preferred if the central portion has an inclination to the longitudinal axis, which is greater than 45 ° and in particular less than 50 °.
  • each groove seen in the flow direction has a portion in which the inclination to the longitudinal axis changes continuously.
  • the bottom of the respective groove is designed curved, which can be achieved in particular by the fact that the inner surface of the atomizing sleeve or the outer surface of the mixer housing is formed curved in the direction of the longitudinal axis.
  • the sputtering sleeve is connected thread-free with the mixer housing, for example, the sputtering sleeve is fastened by means of a sealing snap connection to the mixer housing
  • the mixer housing outside the distal end region has a substantially rectangular, preferably square, cross-sectional area perpendicular to the longitudinal axis (A) and the mixing element is rectangular, preferably square, configured perpendicular to the longitudinal direction. This allows the proven mixers, available under the brand name Quadro®, to be used with the static spray mixer.
  • the mixer housing and / or the atomizing sleeve are injection-molded, preferably made of a thermoplastic.
  • Fig. 1 shows a longitudinal section of a first embodiment of an inventive static spray mixer, which is generally designated by the reference numeral 1.
  • the spray mixer is used for mixing and spraying of at least two flowable components.
  • Fig. 2 shows a perspective view of the distal end portion of the first embodiment.
  • the spray mixer 1 comprises a tubular, one-piece mixer housing 2 which extends in the direction of a longitudinal axis A to a distal end 21 extends.
  • the distal end 21 is meant that end at which the mixed components leave the mixer housing 2 in the operating state.
  • the distal end 21 is provided with an outlet opening 22.
  • the mixer housing 2 has a connecting piece 23, by means of which the mixer housing 2 can be connected to a reservoir for the components.
  • This reservoir can be, for example, a known two-component cartridge, designed as a coaxial or side-by-side cartridge, or two tanks in which the two components are kept separate from each other.
  • the connector is configured, for example as a snap connection, as a bayonet connection, as a threaded connection or combinations thereof.
  • At least one static mixing element 3 is arranged in a manner known per se, which rests against the inner wall of the mixer housing 2, so that the two components can only pass through the mixing element 3 from the proximal end to the outlet opening 22.
  • Either several, successively arranged mixing elements 3 may be provided, or as in the present embodiment, a one-piece mixing element 3, which is preferably injection molded and consists of a thermoplastic.
  • Such static mixers or mixing elements 3 per se are well known to the person skilled in the art and therefore require no further explanation.
  • Such mixing elements are for example in the already cited documents EP-A-0 749 776 and EP-A-0 815 929 described.
  • Such a mixing element 3 of the Qudro® type has a rectangular, in particular a square cross section, perpendicular to the longitudinal direction A. Accordingly, the one-piece mixer housing 2 at least in the area in which it has the mixing element. 3 encloses, a substantially rectangular, in particular square cross-sectional area perpendicular to the longitudinal axis A.
  • the mixing element 3 does not extend all the way to the distal end 21 of the mixer housing 2, but ends at a stop 25 (see Fig. 2 ), which is realized here by the transition of the mixer housing 2 from a square to a round cross-section. Seen in the direction of flow, therefore, the interior of the mixer housing 2 up to this stop 25 has a substantially square cross-section for receiving the mixing element 3.
  • the interior of the mixer housing 2 is in a circular cone shape, which realizes a taper in the mixer housing 2.
  • the interior thus has a circular cross section and forms an exit region 26, which tapers in the direction of the distal end 21 and there opens into the outlet opening 22.
  • the static spray mixer 1 further comprises a sputtering sleeve 4 having an inner surface which encloses the mixer housing 2 in its end region.
  • the atomizing sleeve 4 is designed in one piece and is preferably injection-molded, in particular made of a thermoplastic. It has an inlet channel 41 for a pressurized atomizing medium, which is in particular gaseous. Preferably, the atomization medium is compressed air.
  • the inlet channel 41 can be designed for all known connections, in particular also for a Luer lock.
  • the atomizing sleeve 4 is preferably connected thread-free with the mixer housing, in the present embodiment by means of a snap connection.
  • a flange-like elevation 24 is provided on the mixer housing 2 (see Fig. 2 ), which extends over the entire circumference of the mixer housing 2.
  • a circumferential groove 43 is provided, which is designed to cooperate with the survey 24. If the atomizing sleeve 4 is pushed over the mixer housing 2, the projection 24 snaps into the circumferential groove 43 and ensures a stable connection of the atomizing sleeve 4 to the mixer housing 2.
  • this snap connection is designed sealing, so that the Zerstäubungsmedium- here the compressed air can not escape through this existing from the circumferential groove 43 and the survey 24 compound.
  • the atomizing sleeve 4 lies with its inner surface in a region between the mouth of the inlet channel 41 and the elevation 24 closely on the outer surface of the mixer housing 2, so that also a sealing effect is achieved, which prevents leakage or reverse flow of the atomizing medium.
  • connection between the atomizing sleeve 4 and the mixer housing 2 is designed such that the atomizing sleeve 4 connected to the mixer housing 2 is rotatable about the longitudinal axis A. This is ensured for example in a snap connection with the fully circumferential circumferential groove 43 and the survey 24.
  • the rotatability of the atomizing sleeve 4 has the advantage that the inlet channel 41 can always be aligned so that it can be connected as simply as possible to a source for the atomizing medium.
  • grooves 5 which form separate flow channels 51 between the Zerstäubungshülse 4 and the mixer housing 2, through which the Zerstäubungsmedium from the inlet channel 41 of the atomizing 4 can flow to the distal end 21 of the mixer housing 2.
  • the grooves 5 are provided in the inner surface of the atomizing sleeve 4, they can of course also be provided in a similar manner analogously or in addition in the outer surface of the mixer housing 2.
  • the grooves 5 may be curved, for example, arcuate or rectilinear or may be configured by combinations of curved and rectilinear sections.
  • FIG. 3 another perspective view of the atomizing sleeve 4 of the first embodiment, wherein the view into the atomizing sleeve 4 takes place in the flow direction.
  • Fig. 4 is a longitudinal section through the atomizing sleeve 4 is shown.
  • each flow channel 51 and the associated grooves 5 is formed so that it has seen in the direction of flow in each case a changing inclination to the longitudinal axis A.
  • each groove 5 seen in the flow direction comprises three consecutively arranged sections 52, 53, 54 (see also Fig. 3 and Fig. 4 ), wherein the central portion 53 has an inclination ⁇ 2 to the longitudinal axis A, which is greater than the inclination ⁇ 1 , ⁇ 3 of the two adjacent sections 52 and 54.
  • the inclination of the grooves 5 with respect the longitudinal axis A respectively constant.
  • the inclination ⁇ 1 may also be zero (see Fig. 4 ), that is, this section 52 may extend in the direction of the longitudinal axis A seen parallel to the longitudinal axis A.
  • the bottom of each groove 5 is part of a conical or truncated cone surface, wherein the cone angle ⁇ 2 in the central portion 53 is greater than the cone angle ⁇ 1 , ⁇ 3 in the adjacent sections 52 and 54.
  • the inclination with respect to the longitudinal axis may also be zero;
  • the grooves 5 in this first section 52 are each part of a cylindrical surface, the angle ⁇ 1 has the value 0 °.
  • the inclination ⁇ 2 is preferably greater than 45 ° and less than 50 °. In the embodiment described here, the inclination is ⁇ 2 against the longitudinal axis A in the middle section 46 °. In the first section 52, the inclination ⁇ 1 here is 0 °. In the third section 54, which lies at the distal end 21, the inclination ⁇ 3 egen the longitudinal axis A is preferably less than 20 °, in the present example, it is about 10 ° to 11 °.
  • Each of the grooves 5 is bounded laterally by two walls, which are formed by ribs 55, which are each arranged between two adjacent grooves 5. How this particular out Fig. 3 and Fig. 4 As can be seen, change these ribs 55 seen in the direction of flow their height H, which means their extension in the direction perpendicular to the longitudinal axis A radial direction. The ribs begin in the region of the mouth of the inlet channel 41 and in the first section 52 with a height of zero and then rise continuously until they have reached their maximum height in the central portion 53.
  • the inlet channel 41 through which the atomizing medium enters the flow channels 51, is arranged asymmetrically with respect to the longitudinal axis A.
  • the inlet channel 41 has a central axis Z.
  • the inlet channel 41 is arranged so that its central axis Z does not intersect the longitudinal axis A, but has a vertical distance e from the longitudinal axis A.
  • This asymmetric or even eccentric arrangement of the inlet channel 41 with respect to the longitudinal axis A has the consequence that the atomizing medium, in this case the compressed air, when entering the annular space 6 in a rotational or swirling motion about the longitudinal axis A is added.
  • the inlet channel 41 is as in Fig. 8 shown - arranged that it opens perpendicular to the longitudinal axis A in the inner surface of the atomizing sleeve 4.
  • the inlet channel 41 opens at an angle different from 90 °, ie obliquely to the longitudinal axis A.
  • the grooves 5, in this embodiment, eight grooves 5, are evenly distributed over the inner surface of the atomizing sleeve 4.
  • the grooves 5, which form the flow channels 51 do not extend exactly in the axial direction defined by the longitudinal axis A or inclined not only on the longitudinal axis, but the extension of the grooves 5 also has a component in the circumferential direction of the atomizing sleeve 4. Dies is particular from the illustration in Fig. 3 and in Fig. 6 seen.
  • the course of the grooves 5 is at least approximately helical or helical about the longitudinal axis A.
  • the ribs 55 which form the walls of the grooves 5 .
  • the ribs 55 are formed so that at least in the central portion 53 a of the two walls, which laterally delimit the grooves 5 in each case, are curved in the direction of flow or are approximately curved by a polygon.
  • the respective other wall is formed linearly but extends obliquely to the longitudinal axis A, that they each have a component in the circumferential direction. Due to the curvature of one wall, the generation of the twist can be positively influenced.
  • Fig. 5 shows a perspective view of the distal end portion 27 of the mixer housing 2 with the distal end 21.
  • the distal end portion 27 of the mixer housing 2 tapers toward the distal end 21.
  • the distal end region 27 is conical and comprises two successively arranged regions, namely an upstream flat region 271 and a steeper region 272 adjoining it means in the areas 271 and 272, the outer surface of the mixer housing 2 is configured in each case as a frustoconical surface, wherein the measured against the longitudinal axis cone angle of the flat portion 271 is smaller than the measured against the longitudinal axis A cone angle of the steeper region 272.
  • the flat portion 271 is configured with a cone angle of 0 °, that is, the flat portion 271 is then cylindrical.
  • the outer surface of the mixer housing 2 is then in the flat region 271, the lateral surface of a cylinder whose cylinder axis coincides with the longitudinal axis A.
  • FIG. 1 shows that sticks out in Fig. 5 illustrated distal end 21 of the mixer housing 2 on the sputtering 4 also.
  • the inner surface of the atomizing sleeve 4 is configured to cooperate with the distal end portion 27 of the mixer housing 2.
  • the provided between the grooves 5 ribs 55 of the atomizing sleeve 4 and the outer surface of the mixer housing 2 are close and sealing to each other so that the grooves 5 in each case a separate flow channel 51st form between the inner surface of the atomizing sleeve 4 and the outer surface of the mixer housing 2 (see Fig. 6 ).
  • the height H of the ribs 55 is so small that an annular space 6 exists between the outer surface of the mixer housing 2 and the inner surface of the atomizer sleeve 4.
  • the annular space 6 is in fluid communication with the inlet channel 41 of the atomizer sleeve 4.
  • the height H of the ribs 55 within the annular space 6 is not necessarily everywhere zero. As this particular from the Fig.
  • the flow channels 51 In order to increase the energy input from the sputtering medium to the exiting from the outlet opening 22 components, it is a particularly advantageous measure to design the flow channels 51 according to the principle of a Laval nozzle with a first narrowing in the flow direction and then expanding flow cross-section.
  • two dimensions are available, namely the two directions of the plane perpendicular to the longitudinal axis A.
  • One direction is referred to as a radial direction, which means the direction perpendicular to the longitudinal axis A, which points radially outward from the longitudinal axis A.
  • the other direction is referred to as the circumferential direction, which means the direction which is perpendicular both in the direction defined by the longitudinal axis A and in the radial direction.
  • the extent of the flow channels 51 in the radial direction is referred to as their depth.
  • the principle of the Laval nozzle can be realized in that in the middle steep section 53, the depth of the flow channels 51 in the flow direction decreases sharply. The depth is there minimal, where at the mixer housing 2, the transition from the flat portion 271 in the steeper area 272 takes place. Downstream of this transition, the depth of the flow channels 51 increases again, mainly due to the fact that here the outer surface of the mixer housing 2 part of a steeper truncated cone and the inclination of the inner surface of the Zerstäubungshülse 4 in the third section 54 remains substantially constant.
  • the flow channels 51 may also be configured with respect to the circumferential direction according to the principle of a Laval nozzle. This is best in the presentation of Fig. 3 to recognize.
  • the grooves 5 are designed in the central portion 53 so that they narrow in the flow direction with respect to the circumferential direction. This is realized in that the walls of the grooves 5 formed by the ribs 55 do not run parallel for each groove 5, but the one wall extends to the other, so that a reduction of the extent of the groove 5 in the circumferential direction.
  • the one wall is formed linearly in each groove 5, while the other wall is designed curved in the flow direction in such a way that the flow channel 51 narrows with respect to the circumferential direction.
  • the air used as a sputtering medium can be additionally applied with kinetic energy and thus accelerate downstream of the narrowest point. As with a Laval nozzle, this happens through the flow cross-section widening again in the direction of flow. This results in a higher energy input into the components to be atomized.
  • the beam is stabilized by this realization of the lavaline principle.
  • the diverging, that is again widening opening of the respective flow channel 51 also has the positive effect of avoiding or at least a significant reduction of fluctuations in the beam.
  • this first embodiment operates as follows.
  • the static spray mixer is connected by means of its connecting piece 23 to a storage vessel containing the two components separated from each other, for example with a two-component cartridge.
  • the inlet channel 41 of the atomizing sleeve 4 is connected to a source of the atomizing medium, for example a compressed air source.
  • the two components are discharged, get into the static spray mixer 1 and are intimately mixed there by means of the mixing element 3.
  • the two components after flowing through the mixing element 3, pass through the outlet region 26 of the mixer housing 2 to the outlet opening 22.
  • the compressed air flows through the inlet channel 41 of the atomizing sleeve 4 into the annular space 6 between the inner surface of the atomizing sleeve 4 and the outer surface of the mixer housing 2 , Obtained by the asymmetric arrangement a twist and passes from there through the grooves 5, which form the flow channels 51, to the distal end 21 and thus to the outlet opening 22 of the mixer housing 3.
  • the stabilized by the swirl compressed air flow meets the through the outlet opening 22 exiting mixed material, atomizes it evenly and transports it as a spray to the substrate to be treated or coated. Since in some applications the discharge of the components from the storage vessel takes place with compressed air or compressed air, the compressed air can also be used for the atomization.
  • An advantage of the static spray mixer 1 according to the invention can be seen in its particularly simple construction and production.
  • only three parts namely a one-piece mixer housing 2, an integral mixing element 3 and a one-piece atomizing sleeve 4 are required, wherein each of these parts can be produced in a simple and economical manner by injection molding.
  • the particularly simple design also allows for - at least largely - automated assembly of the parts of the static spray mixer 1. In particular, no screwing these three parts are necessary.
  • the mixer housing and / or the atomizing sleeve are injection-molded, preferably made of a thermoplastic.
  • the mixing element is configured in one piece and injection-molded, preferably of a thermoplastic.
  • Fig. 9 shows a longitudinal section of the second embodiment, analogous to Fig. 1
  • Fig. 10 shows a perspective sectional view of the distal end portion of the second embodiment.
  • Fig. 11 is analogous to Fig. 3
  • Fig. 12 shows in one too Fig. 5 analog representation of the distal end portion 27 of the mixer housing.
  • Fig. 11 in the Fig. 13-15 in each case a cross section perpendicular to the longitudinal axis A shown, in Fig. 13 along the section line XIII-XIII in Fig. 9 ; in Fig. 14 along the line XIV-XIV; and in Fig. 15 along the section line XV-XV in Fig. 9 ,
  • a changing inclination of the flow channels 51 to the longitudinal axis A is realized, but by a continuous change.
  • the atomizing sleeve 4 has a portion 56 (see Fig. 11 ), in which the inclination of the grooves 5 in the direction of flow changes continuously. This is the inner surface the sputtering sleeve 4 at least in the section 56 curved in the flow direction configured so that here the inclination of the grooves 5 changes continuously.
  • the flow channels 51 extend spirally about the longitudinal axis A, their extent in the circumferential direction in the section 56 decreasing in the direction of flow.
  • Fig. 12 shows a perspective view of the distal end portion 27 of the mixer housing 2 with the distal end 21.
  • the distal end portion 27 of the mixer housing 2 tapers toward the distal end 21.
  • the distal end region 27 is configured as part of an ellipsoid of revolution, ie, in addition to the curvature in the circumferential direction, a curvature is also provided in the axial direction defined by the longitudinal axis A.
  • the two successively arranged in the direction of the longitudinal axis A arranged areas, namely the upstream flat portion 271 and the subsequent steeper area 272. are each curved in the axial direction, that is, in the areas 271 and 272 is the outer surface of the mixer housing.
  • the measure according to the invention allows the inlet channel 41 to be arranged asymmetrically with respect to the longitudinal axis A so as to produce a swirling movement when the atomizing medium flows in, is not restricted to the exemplary embodiments of a static spray mixer described here, but can also be used for other embodiments.
  • the asymmetrical arrangement of the inlet channel 41 is also suitable for such static spray mixers as described in the already cited European patent application no. 09168285 Sulzer Mixpac AG.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
EP11718397.0A 2010-07-20 2011-05-09 Statischer sprühmischer Active EP2595759B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11718397.0A EP2595759B1 (de) 2010-07-20 2011-05-09 Statischer sprühmischer

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10170139 2010-07-20
PCT/EP2011/057378 WO2012010337A1 (de) 2010-07-20 2011-05-09 Statischer sprühmischer
EP11718397.0A EP2595759B1 (de) 2010-07-20 2011-05-09 Statischer sprühmischer

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EP2595759A1 EP2595759A1 (de) 2013-05-29
EP2595759B1 true EP2595759B1 (de) 2015-03-18

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KR (1) KR101912726B1 (zh)
CN (2) CN107376686B (zh)
BR (1) BR112012031013B1 (zh)
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ES (1) ES2533589T3 (zh)
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KR101912726B1 (ko) 2018-10-29
RU2570005C2 (ru) 2015-12-10
RU2570005C9 (ru) 2016-05-20
CN103140294B (zh) 2017-10-17
US20180001332A1 (en) 2018-01-04
US9770728B2 (en) 2017-09-26
CN107376686B (zh) 2021-02-09
DK2595759T3 (en) 2015-06-08
CN103140294A (zh) 2013-06-05
EP2595759A1 (de) 2013-05-29
RU2013107372A (ru) 2014-08-27
TW201233447A (en) 2012-08-16
CN107376686A (zh) 2017-11-24
MX2013000683A (es) 2013-02-27
US20130112778A1 (en) 2013-05-09
ES2533589T3 (es) 2015-04-13
JP2013535318A (ja) 2013-09-12
TWI554333B (zh) 2016-10-21
US10265713B2 (en) 2019-04-23
JP6033773B2 (ja) 2016-11-30
BR112012031013B1 (pt) 2021-03-09
KR20130092547A (ko) 2013-08-20
CA2805940A1 (en) 2012-01-26
WO2012010337A1 (de) 2012-01-26
CA2805940C (en) 2018-02-13
BR112012031013A2 (pt) 2016-10-25

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