EP0408786A1 - T˻te de buse - Google Patents

T˻te de buse Download PDF

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Publication number
EP0408786A1
EP0408786A1 EP89113217A EP89113217A EP0408786A1 EP 0408786 A1 EP0408786 A1 EP 0408786A1 EP 89113217 A EP89113217 A EP 89113217A EP 89113217 A EP89113217 A EP 89113217A EP 0408786 A1 EP0408786 A1 EP 0408786A1
Authority
EP
European Patent Office
Prior art keywords
air
nozzle
omnidirectional
nozzle head
head according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89113217A
Other languages
German (de)
English (en)
Other versions
EP0408786B1 (fr
Inventor
Dr. Schmon
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.)
SATA GmbH and Co KG
Original Assignee
SATA GmbH and Co KG
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 SATA GmbH and Co KG filed Critical SATA GmbH and Co KG
Priority to DE89113217T priority Critical patent/DE58905400D1/de
Priority to EP89113217A priority patent/EP0408786B1/fr
Priority to ES89113217T priority patent/ES2045288T3/es
Priority to AT89113217T priority patent/ATE93417T1/de
Priority to US07/512,316 priority patent/US5088648A/en
Publication of EP0408786A1 publication Critical patent/EP0408786A1/fr
Application granted granted Critical
Publication of EP0408786B1 publication Critical patent/EP0408786B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a nozzle head for a paint spray gun according to the preamble of claim 1.
  • Such nozzle heads are used in high-pressure guns which are operated with an air pressure of the compressed air of approximately 4 bar.
  • the paint is atomized very finely.
  • These nozzle heads therefore work with high air pressure and a relatively small amount of air.
  • the omnidirectional air nozzle of the nozzle head has an outlet area of 2 to 3 mm 2, from which the air emerges at high speed and flows past the cone that protrudes about 0.1 mm above the outlet area. This entrains paint from the paint nozzle and atomizes it. The finer this atomization, the greater the fog formation, i.e. H.
  • the air emerging from the round jet air nozzle forms a sharply defined ring jet which fans out at a distance from the nozzle head.
  • the outside of this round air jet has a very high speed difference to the ambient air. The paint is accelerated to relatively high speeds when atomized.
  • low pressure guns are used which are operated at an air pressure of maximum 0.7 bar and a large amount of air.
  • Such low pressure guns are the subject of DE-A 28, for example 22 650 and DE-A 33 18 205.
  • a common feature is that the compressed air emerging from the omnidirectional air nozzle emerges at low pressure and a large volume.
  • the exit surface of the omnidirectional air nozzle therefore has an area of approximately 15 mm 2.
  • the ink jet is surrounded by an air cone that largely prevents the escape of paint mist.
  • the disadvantage is accepted that the paint is atomized only insufficiently and reaches the surface to be coated in the form of relatively large drops. Parts of these drops leave the spray jet and fall down, which is clearly visible when a paper is placed on the floor under the jet.
  • the object is to design the nozzle head in such a way that fog formation is largely avoided despite fine atomization when it is used with a high-pressure paint spray gun.
  • the lowering ensures that the round air jet is already fanned out before the air flows past the nozzle opening of the paint nozzle.
  • the cone-shaped ring air jet has a high atomization inside color flow flow, which decreases towards the outside of the air cone.
  • the air holes create a ring air screen around the ring air jet.
  • This ring air screen has the effect that color droplets possibly emerging from the jet are transported back into the jet. Since the total cross-sectional area of these air bores is smaller than that of the omnidirectional air nozzle, the energy content of the ring air screen is relatively low, as a result of which its flow velocity is also lower.
  • the ring air screen therefore acts as a sliding layer between the rapidly moving atomized jet and the still ambient air, which largely prevents the tangential inflow of ambient air into the atomized jet.
  • the rebound of paint or the lateral outflow of the paint mist on the object to be coated is also significantly reduced by this ring air screen, which holds the jet together as a whole.
  • the effective nozzle area of the omnidirectional air nozzle is increased by a factor of 2 to 3 compared to the nozzle head of a high-pressure gun, but is approximately a factor of 3 less than that of a low-pressure gun.
  • This increases the omnidirectional air volume and thus the transition area from moving jet air to the ambient air at rest.
  • the premature drop of paint droplets from the jet decreases significantly because the paint is better enveloped by air.
  • the outflow of paint droplets from the jet center to the outside is drastically reduced.
  • the choice of the total cross-sectional area of the horn jet air nozzles has the effect that the energy content and the speed of the air flowing out of these nozzles is greater compared to a high-pressure gun. This gives you a powerful broad jet.
  • the recessed arrangement of the air holes with respect to the round jet air nozzle means that a ring air screen has already formed when the air emerging from the air holes hits the outside of the round air jet.
  • the provision of two differently steep frustoconical surfaces between the omnidirectional air nozzle and the ring of the air holes prevents paint droplets from flowing in the direction of the air holes as a result of the suction effect in the air holes.
  • nozzle head When this nozzle head is used with a high-pressure gun, the paint is atomized finely, fog formation is largely avoided and the outflow of paint droplets from the jet center to the outside is significantly reduced.
  • the nozzle head thus has the advantages of nozzle heads in high and low pressure guns, but avoids their disadvantages.
  • the nozzle head has a paint nozzle body 1 which can be connected to the paint spray gun via a thread 2.
  • This paint nozzle body 1 is surrounded by an air nozzle body 3, which can also be connected to the paint spray gun via a union nut 4.
  • the paint nozzle body 1 has a central bore 5, which merges into a conical paint nozzle 6, which can be closed by a nozzle needle 7.
  • the paint nozzle body 1 ends with a circular cylindrical cone 8.
  • the air nozzle body 3 has two diametrically opposed horns 9, each of which has a horn jet air nozzle 10. These horn jet air nozzles 10 communicate with air supply bores 11 which run through the air nozzle body 3 and open into an annular chamber 12 which is formed between the paint nozzle body 1 and the air nozzle body 3. On the face side, an annular space 13 is formed between the paint nozzle body 1 and the air nozzle body 3, to which three air supply bores 14 run through the paint nozzle body 1. These air supply bores 14 open into a further annular chamber 15 on the rear of the paint nozzle body 1.
  • the air nozzle body 3 has a central bore which surrounds the suppository 8, as a result of which there is between the suppository 8 and this bore forms an omnidirectional air nozzle 16.
  • the bore of the omnidirectional air nozzle 16 on the air nozzle body side is provided on the outside with a depression 17 which diverges outwards.
  • the suppository 8 projects outwards beyond the exit surface of the omnidirectional air nozzle 16.
  • the omnidirectional air nozzle 16 is surrounded by a ring of air holes 18. These air holes open in the annular space 13. These air holes 18 are arranged in a converging incline in the direction of the beam axis 19. In the illustrated embodiment, the inclination is 10 °.
  • the outlet openings of the air bores 18 are arranged recessed with respect to the outlet surface of the omnidirectional air nozzle 16. Between the outer edge of the omnidirectional air nozzle 16 and the rim of the air bores 18, two truncated cone surfaces are provided, specifically a flat truncated cone surface 20 on the inside and a steep truncated cone surface 21 adjoining it.
  • a total of 17 air holes 18 are provided, each of which has a diameter of 0.5 mm.
  • the wall thickness of the suppository 8 is less than 0.5 mm, its projection over the exit surface of the omnidirectional air nozzle 16 is preferably 0.3 mm.
  • the omnidirectional air nozzle 16 has an area of approximately 5.5 mm 2 at its narrowest point. It is thus approximately 1.6 times larger than the total cross-sectional area of the air bores 18.
  • the total cross-sectional area of the three air supply bores 14 is approximately the same size as the total cross-sectional area of the air bores 18 plus the cross-sectional area of the omnidirectional air nozzle 16.
  • the total cross-sectional area of the two horn jet air nozzles 10 is approximately the same size as the total cross-sectional area of omnidirectional air nozzle 16 and the air holes 18.
  • a conical atomization area of the paint emerging from the paint nozzle 6 occurs.
  • the depression 17 ensures that the round jet 23 fuses out in front of the atomization area 22 of the paint and thus has a speed gradient which drops sharply from the inside to the outside.
  • the annular air screen 24 produced by the air bores 18 then strikes the outer surface of the round jet 23 and has an even lower speed to the outer surface of the round jet 23.
  • the inflow of ambient air into the area of the omnidirectional jet 23 is hereby avoided with certainty.
  • the small wall thickness of the suppository 8 and its projection over the exit surface of the omnidirectional air nozzle 16 have the effect that fog formation is largely avoided.
  • the speed curve inside the circular jet and the ring air screen, seen from the inside out prevents paint droplets from getting out of the atomization area.

Landscapes

  • Nozzles (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP89113217A 1989-07-19 1989-07-19 Tête de buse Expired - Lifetime EP0408786B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE89113217T DE58905400D1 (de) 1989-07-19 1989-07-19 Düsenkopf.
EP89113217A EP0408786B1 (fr) 1989-07-19 1989-07-19 Tête de buse
ES89113217T ES2045288T3 (es) 1989-07-19 1989-07-19 Cabeza de toberas
AT89113217T ATE93417T1 (de) 1989-07-19 1989-07-19 Duesenkopf.
US07/512,316 US5088648A (en) 1989-07-19 1990-04-23 Nozzle head for a paint spray gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89113217A EP0408786B1 (fr) 1989-07-19 1989-07-19 Tête de buse

Publications (2)

Publication Number Publication Date
EP0408786A1 true EP0408786A1 (fr) 1991-01-23
EP0408786B1 EP0408786B1 (fr) 1993-08-25

Family

ID=8201643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113217A Expired - Lifetime EP0408786B1 (fr) 1989-07-19 1989-07-19 Tête de buse

Country Status (5)

Country Link
US (1) US5088648A (fr)
EP (1) EP0408786B1 (fr)
AT (1) ATE93417T1 (fr)
DE (1) DE58905400D1 (fr)
ES (1) ES2045288T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208500A1 (de) * 1992-03-17 1993-09-23 Kleinmichel Klaus Gmbh Spritzvorrichtung zum aufbringen eines fluessigen mediums wie farbe
EP0650766A2 (fr) * 1993-10-28 1995-05-03 Ransburg Corporation Buse alimentée par suction pour pistolets de pulvérisation basse pression
US5540385A (en) * 1993-11-22 1996-07-30 Itw Limited Spray nozzle for high volume low pressure air
EP1331037A2 (fr) 2002-01-24 2003-07-30 Dürr Systems GmbH Procédé et pulvérisateur pour le revêtement de pièces en séries

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669557A (en) * 1994-12-14 1997-09-23 Tram-7 Precision, Inc. System and process for spraying air-dryable liquid materials
US5558276A (en) * 1994-12-14 1996-09-24 Tram-7 Precision, Inc. Air gun for spraying and drying air-dryable liquid materials
US6793155B2 (en) * 2002-03-14 2004-09-21 Tiao-Hsiang Huang Spray gun pressure stabilizer
US20060029728A1 (en) * 2004-08-03 2006-02-09 Roger Stull Method of repair for plastic automotive body panels
EP1930084B1 (fr) 2006-12-05 2009-06-03 SATA GmbH & Co. KG Event pour le godet à gravité d'un pistolet à peinture
CN101970127B (zh) 2008-03-12 2014-11-12 杰弗里·D·福克斯 用后可弃的喷枪筒管
DE202008014389U1 (de) * 2008-10-29 2010-04-08 Sata Gmbh & Co. Kg Fließbecher für eine Farbspritzpistole
DE102009032399A1 (de) 2009-07-08 2011-01-13 Sata Gmbh & Co. Kg Farbspritzpistole
DE202010007355U1 (de) 2010-05-28 2011-10-20 Sata Gmbh & Co. Kg Düsenkopf für eine Spritzvorrichtung
US9333519B2 (en) 2010-12-02 2016-05-10 Sata Gmbh & Co. Kg Spray gun and accessories
US10189037B2 (en) 2011-06-30 2019-01-29 Sata Gmbh & Co. Kg Easy-to-clean spray gun, accessories therefor, and mounting and dismounting methods
JP5787407B2 (ja) 2012-08-03 2015-09-30 アネスト岩田株式会社 スプレーガン
JP5787408B2 (ja) 2012-08-08 2015-09-30 アネスト岩田株式会社 スプレーガン
JP5787409B2 (ja) 2012-08-10 2015-09-30 アネスト岩田株式会社 スプレーガン
JP5787411B2 (ja) 2012-08-31 2015-09-30 アネスト岩田株式会社 スプレーガン
JP5787410B2 (ja) 2012-08-31 2015-09-30 アネスト岩田株式会社 スプレーガン
CA155474S (en) 2013-09-27 2015-08-27 Sata Gmbh & Co Kg Spray gun
DE202013105779U1 (de) 2013-12-18 2015-03-19 Sata Gmbh & Co. Kg Luftdüsenabschluss für eine Lackierpistole
CA159961S (en) 2014-07-31 2015-07-17 Sata Gmbh & Co Kg Spray gun
CN105289870B (zh) 2014-07-31 2019-09-24 萨塔有限两合公司 喷枪的制造方法、喷枪、喷枪本体以及盖
USD758537S1 (en) 2014-07-31 2016-06-07 Sata Gmbh & Co. Kg Paint spray gun rear portion
USD768820S1 (en) 2014-09-03 2016-10-11 Sata Gmbh & Co. Kg Paint spray gun with pattern
DE102015006484A1 (de) 2015-05-22 2016-11-24 Sata Gmbh & Co. Kg Düsenanordnung für eine Spritzpistole, insbesondere Farbspritzpistole und Spritzpistole, insbesondere Farbspritzpistole
DE102015016474A1 (de) 2015-12-21 2017-06-22 Sata Gmbh & Co. Kg Luftkappe und Düsenanordnung für eine Spritzpistole und Spritzpistole
CN205995666U (zh) 2016-08-19 2017-03-08 萨塔有限两合公司 喷枪及其扳机
CN205966208U (zh) 2016-08-19 2017-02-22 萨塔有限两合公司 风帽组件以及喷枪
GB2575833B (en) * 2018-07-24 2022-08-10 Carlisle Fluid Tech Uk Ltd Fluid tip
DE102018118737A1 (de) 2018-08-01 2020-02-06 Sata Gmbh & Co. Kg Düse für eine Spritzpistole, Düsensatz für eine Spritzpistole, Spritzpistolen und Verfahren zur Herstellung einer Düse für eine Spritzpistole
DE112018007865A5 (de) 2018-08-01 2021-07-15 Sata Gmbh & Co. Kg Düsensatz für eine Spritzpistole, Spritzpistolensystem, Verfahren zum Ausgestalten eines Düsen-Moduls, Verfahren zur Auswahl eines Düsen-Moduls aus einem Düsensatz für eine Lackieraufgabe, Auswahlsystem und Computerprogrammprodukt
DE102018118738A1 (de) 2018-08-01 2020-02-06 Sata Gmbh & Co. Kg Grundkörper für eine Spritzpistole, Spritzpistolen, Spritzpistolen-Set, Verfahren zur Herstellung eines Grundkörpers für eine Spritzpistole und Verfahren zum Umrüsten einer Spritzpistole
DE102020123769A1 (de) 2020-09-11 2022-03-17 Sata Gmbh & Co. Kg Dichtelement zum Abdichten eines Übergangs zwischen einem Grundkörper einer Spritzpistole und einem Anbauteil einer Spritzpistole, Anbauteil, insbesondere Farbdüsenanordnung, für eine Spritzpistole und Spritzpistole, insbesondere Farbspritzpistole

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539536A (en) * 1922-11-24 1925-05-26 Peerless Pneumatic Systems Inc Spray gun
DE611325C (de) * 1932-05-28 1935-03-27 Knorr Bremse Akt Ges Spritzduese fuer die Zerstaeubung von Farbstoff und aehnlichen Fluessigkeiten
US2303280A (en) * 1940-09-09 1942-11-24 Alexander F Jenkins Spray gun
EP0211372A2 (fr) * 1985-08-05 1987-02-25 Iwata Air Compressor Mfg. Co.,Ltd. Pistolet de pulvérisation automatique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA521511A (fr) * 1956-02-07 P. Dalrymple William Pistolets
US2051210A (en) * 1935-09-13 1936-08-18 Binks Mfg Co Air nozzle for spray appliances
US2204599A (en) * 1936-01-09 1940-06-18 Jenkins Alexander Frederick Spray gun
US3848807A (en) * 1973-12-10 1974-11-19 P Partida Confining nozzle for spray gun

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539536A (en) * 1922-11-24 1925-05-26 Peerless Pneumatic Systems Inc Spray gun
DE611325C (de) * 1932-05-28 1935-03-27 Knorr Bremse Akt Ges Spritzduese fuer die Zerstaeubung von Farbstoff und aehnlichen Fluessigkeiten
US2303280A (en) * 1940-09-09 1942-11-24 Alexander F Jenkins Spray gun
EP0211372A2 (fr) * 1985-08-05 1987-02-25 Iwata Air Compressor Mfg. Co.,Ltd. Pistolet de pulvérisation automatique

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208500A1 (de) * 1992-03-17 1993-09-23 Kleinmichel Klaus Gmbh Spritzvorrichtung zum aufbringen eines fluessigen mediums wie farbe
EP0650766A2 (fr) * 1993-10-28 1995-05-03 Ransburg Corporation Buse alimentée par suction pour pistolets de pulvérisation basse pression
EP0650766A3 (fr) * 1993-10-28 1995-09-20 Ransburg Corp Buse alimentée par suction pour pistolets de pulvérisation basse pression.
US5540385A (en) * 1993-11-22 1996-07-30 Itw Limited Spray nozzle for high volume low pressure air
EP1331037A2 (fr) 2002-01-24 2003-07-30 Dürr Systems GmbH Procédé et pulvérisateur pour le revêtement de pièces en séries
EP1923138A1 (fr) 2002-01-24 2008-05-21 Dürr Systems GmbH Procédé et gicleur pour le revêtement en série de pièces à usiner

Also Published As

Publication number Publication date
EP0408786B1 (fr) 1993-08-25
ATE93417T1 (de) 1993-09-15
ES2045288T3 (es) 1994-01-16
DE58905400D1 (de) 1993-09-30
US5088648A (en) 1992-02-18

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