SE524216C2 - Spray head with convex arched front shield with air nozzles - Google Patents
Spray head with convex arched front shield with air nozzlesInfo
- Publication number
- SE524216C2 SE524216C2 SE0104222A SE0104222A SE524216C2 SE 524216 C2 SE524216 C2 SE 524216C2 SE 0104222 A SE0104222 A SE 0104222A SE 0104222 A SE0104222 A SE 0104222A SE 524216 C2 SE524216 C2 SE 524216C2
- Authority
- SE
- Sweden
- Prior art keywords
- front shield
- liquid
- opening
- spray head
- nozzle
- Prior art date
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
-
- 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
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
Landscapes
- Nozzles (AREA)
Abstract
Description
25 524 216 2 kända spruthuvuden är att vätska från sprayen avsätter sig på frontskölden och efterhand bygger upp ett vätskeskikt, som så småningom stör luftutströmningen genom luftmunstycket. Known spray heads is that liquid from the spray settles on the front shield and gradually builds up a liquid layer, which eventually disrupts the air outflow through the air nozzle.
Ett ändamål med uppfinningen är därför att anvisa ett sprut- huvud med en frontsköld, vilken helt eller delvis undanröjer de nämnda problemen. Ändamålet uppnås genom uppfinningen.An object of the invention is therefore to provide a spray head with a front shield, which completely or partially obviates the mentioned problems. The object is achieved by the invention.
Uppfinningen anges i det bilagda självständiga patentkravet.The invention is set out in the appended independent claim.
Enligt ett centralt särdrag hos uppfinningen är frontskölden allmänt konvex utåt, varvid tillplattningsmunstyckena vardera innefattas av en genomloppskanal genom skölden. Kanalen har på sin närmast det ringformiga munstycket belägna sida, en ledyta, vilken är anordnad att med coandaeffekt stabilt rikta ett genom kanalen strömmande luftflöde mot vätskespraykonen.According to a central feature of the invention, the front shield is generally convex outwards, the flattening nozzles each being enclosed by a passage channel through the shield. The channel has on its side located closest to the annular nozzle, a guide surface, which is arranged to stably direct a flow of air flowing through the channel towards the liquid spray cone with coanda effect.
Genom uppfinningen minimeras avsättningen av vätska på frontsköldens utsida, och vidare kan frontskölden enkelt avtorkas vid behov. Ledytan har företrädesvis formen av ett V-format spår, varvid spåren i de båda ledytorna har ett gemensamt symmetriplan och varvid spåren har sina bottnar vända mot varandra.The invention minimizes the deposition of liquid on the outside of the front shield, and furthermore the front shield can be easily wiped off if necessary. The joint surface preferably has the shape of a V-shaped groove, the grooves in the two joint surfaces having a common plane of symmetry and the grooves having their bottoms facing each other.
Frontsköldens kanal bildar ett munstycke för tillplattnings- luftströmmen och har på sköldens frontsida en urtagning, vars vägg är fjärmad från den passerande luftströmmen, utom vid ledytan.The channel of the front shield forms a nozzle for the flattening air flow and has a recess on the front side of the shield, the wall of which is spaced from the passing air flow, except at the joint surface.
Uppfinningen kommer i det följande att beskrivas i exempel- form med hänvisning till den bilagda ritningen. visar UI chematiskt en axialsektion genom en front- sköld med tillhörande luft- och vätskemunstycken för ett spruthuvud. 10 15 20 25 30 35 524 216 3 Fig. 2 visar frontskölden i perspektivvy, Fig. 3 visar schematiskt ena halvan av en frontvy över frontsköldens exponerade yta, Fig. 4 visar en schematisk perspektivisk vy över frontskölden.The invention will be described in the following in an exemplary form with reference to the accompanying drawing. UI chemically shows an axial section through a front shield with associated air and liquid nozzles for a spray head. Fig. 2 shows the front shield in perspective view, Fig. 3 schematically shows one half of a front view of the exposed surface of the front shield, Fig. 4 shows a schematic perspective view of the front shield.
I Fig 1 visas en del av en rörformig stomme 1 tillhörande ett spraysprutningshuvud. En frontsköld 2 är buren pá stom- men 1 och är fasthällen vid denna medelst en montagefläns 3, vilken är medelst ett gängförband ansluten till stommen.Fig. 1 shows a part of a tubular body 1 belonging to a spray spray head. A front shield 2 is carried on the frame 1 and is attached to it by means of a mounting flange 3, which is connected to the body by means of a threaded connection.
Skölden 2 har en allmänt sfärisk välvd ytteryta 21 och har i sitt centrumomràde en cirkulär öppning 22. Centralt i öppningen 22 mynnar ett koniskt avsmalnande färgmunstycke 24, vars utlopp 25 är beläget strax utanför sköldens 2 ytteryta. En axiellt förskjutbar nål 26 i munstycket 24 reglerar flödet av en vätska som framleds genom munstycket respektive kan försluta munstycket 24.The shield 2 has a generally spherically curved outer surface 21 and has in its center area a circular opening 22. Central to the opening 22 opens a conically tapered paint nozzle 24, the outlet 25 of which is located just outside the outer surface of the shield 2. An axially displaceable needle 26 in the nozzle 24 regulates the flow of a liquid which is passed through the nozzle or can close the nozzle 24, respectively.
Mellan munstycket 24 och sköldöppningens 22 vägg etableras ett ringformigt luftmunstycke 28, som tillföres luft via en därtill anslutande kanal 29.Between the nozzle 24 and the wall of the shield opening 22, an annular air nozzle 28 is established, which is supplied with air via a channel 29 connected thereto.
Vid början av sprayningsförloppet framledes luft genom ringkanalen 28, varefter nålen 26 àterdras så att vätska utsprutas centralt i det ringformade luftflödet, som avgår genom spalten 28, varvid en finfördelad konformig vätskedimma etableras och bortströmmar i spruthuvudets axelriktning A.At the beginning of the spraying process, air is passed through the annular channel 28, after which the needle 26 is retightened so that liquid is sprayed out centrally in the annular air flow, which exits through the gap 28, whereby a finely divided conical liquid mist is established and flows away in the axis direction A.
I ett axialplan innehållande axeln A finns pä motsatta sidor om öppningen 22 genomloppskanaler 40 genom skölden 2.In an axial plane containing the shaft A, on opposite sides of the opening 22 there are passage channels 40 through the shield 2.
Kanalerna ansluter till en bakre djupare ände av ett V-spår 10 15 20 25 30 35 524 216 4 42, som är riktat mot axeln A, och som löper ut mot sköl- dens frontyta på ett ringa avstånd från öppningen 22. I en praktisk utföringsform kan detta avstånd vara exempelvis 2 mm. Spårets 42 bakre vägg är väsentligen vinkelrät mot den såsom borrning utförda kanalen 40. Spåret är utmed hela sin längd exponerat på sköldens frontsida. Borrningen 40 sträcker sig med en ringa vinkel mot normalplanet till axeln A, och spårets väggar bildar inbördes en vinkel unge- fär 90° i en utföringsform. Spåret bildar en styrningsläpp för luftströmmen något från borrningens riktning. Styrläp- parna är formade för att i sin längdriktning stabilt leda den avgående luftströmmen medelst en coandaeffekt.The channels connect to a rear deeper end of a V-groove 10 15 20 25 30 35 524 216 4 42, which is directed towards the axis A, and which extends towards the front surface of the shield at a small distance from the opening 22. In a practical embodiment, this distance can be, for example, 2 mm. The rear wall of the groove 42 is substantially perpendicular to the channel 40 designed as a bore. The groove is exposed along its entire length on the front side of the shield. The bore 40 extends at a slight angle to the normal plane to the axis A, and the walls of the groove form an angle of approximately 90 ° with each other in one embodiment. The groove forms a control lip for the air flow slightly from the direction of the bore. The guide lips are shaped to stably direct the outgoing air flow in their longitudinal direction by means of a coanda effect.
Luften till munstyckena 40 kan ledas från en luftkälla, som är oberoende av den luftkälla, vilken levererar luft till ringkanalen 28, så att luftflöden enkelt kan regleras var för sig.The air to the nozzles 40 can be led from an air source which is independent of the air source which supplies air to the annular duct 28, so that air flows can be easily regulated individually.
De av coandaläpparna stabiliserade och styrda luftströmmar- na från kanalerna 40 tillplattar den initiala koniska sprayen mot en tillplattad form.The air streams stabilized and controlled by the coandal lips from the channels 40 flatten the initial conical spray against a flattened shape.
I en föredragen utföringsform finns två eller flera kanaler 40 med tillhörande styrläppar symmetriskt anordnade på var- dera sidan om öppningen 22, och grupperna av kanaler med styrläppar kan vara anordnade spegelsymmetriskt relativt ett axialplan innehållande axeln A. Vinkeln a mellan kana- lerna 40 på respektive sida av öppningen är, i en frontvy mot skölden, ungefär så stor som den i Fig. 3 visade före- dragna vinkeln. Vinkeln mellan axeln A och riktningen för respektive luftstrále, som lämnar styrläppen är nära rät vinkel och visas i utföringsexemplet vara av storleksord- ningen 80°. I skenet av att spåren 40 slutar endast ett par mm från öppningen 22, kommer det inte att uppträda något ”lugnt” område mellan sköldens frontyta, luftströmmarna som 524 216 5 följer de spåren och färgsprayen som avgår från spruthuvu- det. Härigenom elimineras mängden färg som avsätter sig på frontskölden.In a preferred embodiment there are two or more channels 40 with associated guide lips symmetrically arranged on each side of the opening 22, and the groups of channels with guide lips may be arranged mirror-symmetrically relative to an axial plane containing the axis A. The angle α between the channels 40 on the respective side of the opening is, in a front view towards the shield, approximately as large as the preferred angle shown in Fig. 3. The angle between the axis A and the direction of the respective air jet leaving the guide lip is close to the right angle and is shown in the exemplary embodiment to be of the order of 80 °. In the light of the grooves 40 ending only a few mm from the opening 22, no “quiet” area will appear between the front surface of the shield, the air currents following the grooves and the paint spray departing from the spray head. This eliminates the amount of paint that settles on the front shield.
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0104222A SE524216C2 (en) | 2001-12-14 | 2001-12-14 | Spray head with convex arched front shield with air nozzles |
PCT/SE2002/002326 WO2003051524A1 (en) | 2001-12-14 | 2002-12-13 | Spray head for spraying a liquid spray |
AU2002358383A AU2002358383A1 (en) | 2001-12-14 | 2002-12-13 | Spray head for spraying a liquid spray |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0104222A SE524216C2 (en) | 2001-12-14 | 2001-12-14 | Spray head with convex arched front shield with air nozzles |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0104222D0 SE0104222D0 (en) | 2001-12-14 |
SE0104222L SE0104222L (en) | 2003-06-15 |
SE524216C2 true SE524216C2 (en) | 2004-07-13 |
Family
ID=20286327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0104222A SE524216C2 (en) | 2001-12-14 | 2001-12-14 | Spray head with convex arched front shield with air nozzles |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002358383A1 (en) |
SE (1) | SE524216C2 (en) |
WO (1) | WO2003051524A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0605105D0 (en) * | 2006-03-14 | 2006-04-26 | Bwi Plc | Spray gun heads |
KR101729793B1 (en) | 2009-01-26 | 2017-04-24 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Liquid spray gun, spray gun platform, and spray head assembly |
ES2710575T3 (en) * | 2011-02-09 | 2019-04-25 | 3M Innovative Properties Co | Nozzle tips and spray head units for liquid spray guns |
EP2736651B2 (en) | 2011-07-28 | 2024-01-10 | 3M Innovative Properties Company | Spray head assembly with integrated air cap/nozzle for a liquid spray gun |
KR102005127B1 (en) | 2011-10-12 | 2019-07-29 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Spray head assemblies for liquid spray guns |
RU2608490C9 (en) | 2012-03-06 | 2017-06-14 | 3М Инновейтив Пропертиз Компани | Sprayer with built-in pressure channel |
US11167298B2 (en) | 2012-03-23 | 2021-11-09 | 3M Innovative Properties Company | Spray gun barrel with inseparable nozzle |
CA2918141A1 (en) | 2013-07-15 | 2015-01-22 | 3M Innovative Properties Company | Air caps with face geometry inserts for liquid spray guns |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985302A (en) * | 1975-06-12 | 1976-10-12 | Barry Wright Corporation | Variable two stage air nozzle |
JPS6265758A (en) * | 1985-09-18 | 1987-03-25 | Diesel Kiki Co Ltd | Nozzle device |
US5080283A (en) * | 1986-07-14 | 1992-01-14 | Glas-Craft, Inc. | Multi-component application system |
US5178326A (en) * | 1986-07-14 | 1993-01-12 | Glas-Craft, Inc. | Industrial spraying system |
JPH04131155A (en) * | 1990-09-25 | 1992-05-01 | Tonen Corp | Liquid atomizer |
-
2001
- 2001-12-14 SE SE0104222A patent/SE524216C2/en not_active IP Right Cessation
-
2002
- 2002-12-13 AU AU2002358383A patent/AU2002358383A1/en not_active Abandoned
- 2002-12-13 WO PCT/SE2002/002326 patent/WO2003051524A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
SE0104222D0 (en) | 2001-12-14 |
AU2002358383A1 (en) | 2003-06-30 |
SE0104222L (en) | 2003-06-15 |
WO2003051524A1 (en) | 2003-06-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |